Patent Application
20090313287
Computer systems often represent data as multidimensional data. For example, spreadsheets, tables, data grids, data bases, and other computer structures manage data in multidimensional arrays. Managing data in a multidimensional array often involves storing each object of the multidimensional array. This allows users or computer applications to locate and access the objects within the multidimensional array. An example is a spreadsheet comprising cells. A computer application may search each stored cell to find a specific cell. Another example is when a user or computer application applies various actions to the objects such as rendering the objects, inserting new objects, determine if an object exists within the stored array, or enumerating the objects of the multidimensional array. These actions require locating and accessing the objects. As the amount of multidimensional data increase, the resources needed to store, locate, and perform actions on the data increase. This scenario does not scale well as the number of dimensions increase.
This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key factors or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
This disclosure relates to identifying a set of selected objects within a multidimensional array. The set of selected objects may be cells within a spreadsheet having a red background, user selected cells, currently visible cells, or any other designation of a set of selected objects. Users or computer applications many times request objects or perform operations on objects within a multidimensional array. These requests are efficiently performed by managing a sorted index of ranges, representing a subset of the entire multidimensional array data. The index of ranges identifies (e.g. addresses, coordinates, etc.) a set of selected objects within the multidimensional array. One possible format for specifying the index of ranges is to designate a start index and an end index of a dimension (e.g. a row range comprising a start row index and an end row index). This format may be extrapolated to any number of dimensions (e.g. row range comprising a column range).
The index of ranges is maintained in a sorted order, thus allowing a binary search to be performed to efficiently locate and access objects. For example, a computer application may check to see if a specific cell within a spreadsheet is selected (e.g. highlighted). A binary search is performed to determine whether the selected cell is within the index of ranges (the cell is specified). This provides an efficient manner of locating and accessing objects because only a subset of an entire multidimensional array is searched and the index of ranges are sorted allowing for a binary search. The index of ranges is associated with the multidimensional array and is updated depending on operation performed on the array (e.g. selecting new cells, deselecting cells, inserting cells, etc.).
To the accomplishment of the foregoing and related ends, the following description and annexed drawings set forth certain illustrative aspects and implementations. These are indicative of but a few of the various ways in which one or more aspects may be employed. Other aspects, advantages, and novel features of the disclosure will become apparent from the following detailed description when considered in conjunction with the annexed drawings.
The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the claimed subject matter. It may be evident, however, that the claimed subject matter may be practiced without these specific details. In other instances, structures and devices are shown in block diagram form in order to facilitate describing the claimed subject matter.
Data is often stored and managed within multidimensional arrays (e.g. tables, spreadsheets, arrays, databases, etc.). Multidimensional arrays may comprise of one-dimension, two-dimensions, or any number of dimensions. When the amount of data that is associated within a multidimensional array increases, the resources needed to store the data increase and the time needed to manipulate the data becomes increasingly slower. The performance issues become more significant when data is associated in a greater number of dimensions. For example, performance issues may be acceptable for one-dimensional data (e.g. ListBox), but performance issues increase when scaling to two-dimensional data (e.g. DataGrid).
These performance issues, such as increased memory storage, may occur when every object, including empty cells, within a multidimensional array is maintained. A user or a computer application that interacts (e.g. insert cells, remove cells, select cells, locate cells, enumerate cells, etc.) with objects in a multidimensional array may experience decreased performance because the entire set of objects may be searched to locate and provide access to the objects. For example, when a website renders a table (e.g. a DataGrid), the table may determine what cells a user selected. The table searches the entire collection of cells within the table to determine if a cell is selected. The table is rendered with the selected cells shaded grey. As more cells are associated with the table, the time to render the table is increased because the table searches and interacts with more cells.
Data within a multidimensional array may be represented as a set of objects or cells. One method to mitigate performance issues when interacting with a large amount of multidimensional data is to store references (e.g. addresses, indexed rows, indexed columns, etc.) of a subset of selected objects within the multidimensional array. Examples of a subset of selected cells within a spreadsheet are: cells that have the property of a red background; user selected cells; cells currently rendered within the spreadsheet; and cells that comprise a numerical value.
One implementation of a method for storing references to a subset of selected objects within a multidimensional array is a data structure that stores the address of the subset of selected objects in indexed ranges sorted by row and then by column. Performance may increase by keeping the indexed ranges sorted. Objects can be located and accessed using fewer resources because a binary search may be performed on the sorted indexed ranges. A binary search may mitigate the time needed to locate an object by searching first by the row index and then by column index. Performance may also increase because the search comprises the subset of selected objects (not the entire multidimensional array).
The data structure also adds, removes, or modifies indexed ranges to reflect a change of selected objects within the multidimensional array. For example, if a user performs an operation that adds selected objects to the multidimensional array, the data structure updates the indexed ranges to store a set of ranges, in sorted order, corresponding to the new select objects. The data structure may merge overlapping ranges, split ranges, perform intersection operations, or perform compliment operations to the indexed ranges to optimize and maintain a sorted order of the indexed ranges.
An example of a merge operation is a data structure that stores selected objects within in a two-dimensional array (this example may be extrapolated to any number of dimensions) as row ranges and column ranges. The data structure may contain 2 ranges: Row1<start1,end1,column ranges1>and Row2<start2,end2,column ranges2>. The merge is performed when the value of end1 plus 1 is equal to end2, and column ranges1 is equal to column ranges2. The resulting range is Row3<start1,end2,column ranges1>(Row3 replaces Row1 and Row2). The range Row3 is sorted.
Another feature of the data structure is the ability to efficiently query or enumerate the selected objects within the indexed ranges because the indexed ranges are sorted. An example of the data structure enumeration is when selected objects are copied into a clipboard (storage space for copied data). The data structure enumerates the selected objects by column ranges (left to right) and then by row ranges (top to bottom). Because the data structure maintains ranges (e.g. column range, row range, a third dimension range, etc.) in sorted order, the enumeration does not need additional operations, such as, search or sort.
One embodiment of indentifying a set of selected objects in a multidimensional array is illustrated by an exemplary method 140 in
A first selection specifier 168 comprises a first black cells range 170 and a second black cells range 172. The first black cells range 170 and the second black cells range 172 identifies the set of selected black cells (selected objects) 164. The first black cells range 170 indentifies the black cells starting at row 8 and ending at row 8, which start at column 2 and end at column 6 (start row index of 8, end row index of 9, start column index of 2, and end column index of 6). The second black cells range 172 identifies the black cells starting at row 9 and ending at row 10, which start at column 2 and end at column 3 The second black cells range 172 also identifies black cells starting at row 9 and ending at row 10, which start at column 6 and end at column 6. The second black cells range 171 comprises a start row index of 9, and end row index of 10, a start column index of 2, and end column index of 3, a second start column index of 6, and a second end column index of 6.
A second selection specifier 174 comprises a stripped cells range 176. The stripped cells range 176 identifies the set of stripped cells (selected objects) 166. The stripped cells range 176 indentifies the stripped cells starting at row 3 and ending at row 5, which start at column 1 and end at column 3 (start row index of 3, end row index of 3, start column index of 1, and end column index of 3). The first selection specifier 168 and the second selection specifier 174 maintain the ranges in sorted order by a sort criterion (e.g. ascending order by starting row index, then within each row, ascending order by start column index).
A selection specifier 204 (original) specifies an original range 206 of the original set of selected cells 202 within the spreadsheet 220. The original range 206 comprises references (e.g. addresses) indexed by row and column to the original set of selected cells 202. The selection specifier 204 comprises an updating component 222 configured to detect operations (e.g. scrolling, inserting cells, removing cells, rendering cells, etc.) within the spreadsheet 220. An updating component may be configured to receive an operation; identify a set of new selected objects within a multidimensional array; and update a selection specifier with at least one range of the set of new selected objects. The updating component 222 comprises a range removing interface 210 and a range adding interface 216. A range removing interface removes ranges from a selection specifier when objects are deselected (removed) from a multidimensional array. A range adding interface adds ranges to a selection specifier when new objects are selected (inserted) within a multidimensional array.
In the example of system 200, the updating component 222 detects and receives the scrolling operation 218 within the spreadsheet 220 by the user 208. The updating component detects that the set of new selected cells 212 is selected. The updating component 222 updates the selection specifier 204 (after operation) by means of the range removing interface 210 and the range adding interface 216. The original set selected cells 202 are not rendered within the spreadsheet 220 (therefore are deselected within the spreadsheet) after the scrolling operation 218 occurs. The range removing interface 210 removes from the selection specifier 204 the original set of selected cells 202. The range adding interface 216 adds the set of new ranges 214 (corresponding to the set of new selected cells) into the selection specifier 204. The set of new selected cells 212 are rendered (selected) within the spreadsheet 220 after the scrolling operation 218 occurs. The selection specifier 204 (after operation) now comprises a set of new ranges 214 that indentify the set of new selected cells 212 within the spreadsheet 220.
A selection specifier 236 (original) specifies an original range 242 of the original set of selected cells 232 within the multidimensional array 254. The original range 242 comprises references (e.g. addresses) indexed by row and column to the original set of selected cells 232. The selection specifier 236 comprises an updating component 250 configured to receive an operation; identify a set of new selected objects within a multidimensional array; and update a selection specifier with at least one range of the set of new selected objects. The updating component 250 comprises a range removing interface 252 and a range adding interface 248. A range removing interface removes ranges from a selection specifier when objects are deselected (removed) from a multidimensional array. A range adding interface adds ranges to a selection specifier when new objects are selected (inserted) within a multidimensional array.
In the example of system 230, the updating component 250 detects and receives an insert selected cells operation 240. The updating component 250 identifies that a set of operated on cells 234 has been inserted into the multidimensional array 254. The set of operated on cells 234 has an operated on cell range 244. The updating component 250 updates the selection specifier 236 (after operation) by means of the range adding interface 248. The range adding interface 248 receives the operated on cell range 244 and adds the operated on cell range 244 to the selection specifier 236 (after operation). The selection specifier 236 (after operation) now comprises a set of new ranges 246 that identifies the set of new selected cells 256 within the multidimensional array 254.
A selection specifier 272 (original) specifies an original range 274 of the original set of selected cells 270 within the multidimensional array 262. The selection specifier 272 comprises an updating component 280 configured to receive an operation; identify a set of new selected objects within a multidimensional array; and update a selection specifier with at least one range of the set of new selected objects. The updating component 280 comprises a range removing interface 282 and a range adding interface 284. A range removing interface removes ranges from a selection specifier when objects are deselected (removed) from a multidimensional array. A range adding interface adds ranges to a selection specifier when new objects are selected (inserted) within a multidimensional array.
In the example of system 260, the updating component 280 detects and receives an insert selected cells operation 264. The updating component 280 identifies that the set of operated on cells 268 has been inserted (selected) into the multidimensional array 262. The set of operated on cells 268 has an operated on cell range 276. The operated on cell range 276 overlaps the original range 274 of the original set of selected cells 270. The range adding interface 282 merges the appropriate ranges of the original range 274 with the operated on cell range 276 (there is an overlap of row 8 column 3 that creates a Row(8,8,<Col(2,4)>), so that a set of new ranges 278 remains in sorted order. The range removing interface 284 splits the appropriate ranges of the original range 274 and the operated on cell range 276 (row 6 and row 7 now have separate column designations than row 10 and 11, therefore two subselection ranges are created: Row(6,7<Col(3,4)>) and Row(9,10,<Col(2,3)>)). The selection specifier 272 (after operation) now comprises the set of new ranges 278, in sorted order, that identifies the set of new selected cells 266 within the multidimensional array 262.
A selection specifier 308 (original) specifies an original range 310 of selected cells within the multidimensional array 302. The selection specifier 308 comprises an updating component 312. The updating component 312 comprises a range removing interface 314 and a range adding interface 316.
In the example of system 300, the updating component 312 detects and receives a deselected cells operation 306 (e.g. removing cells from the multidimensional array). The updating component 312 identifies an operated on cell range 320 of the deselected cells. The range removing interface 314 receives the operated on cell range 320 of the deselected cells and removes the corresponding operated on cell range 320 from the selection specifier 308. The updating component 312 may merge ranges, split ranges, perform intersect operations, and/or perform compliment operations to maintain a set of new ranges 318 in sorted order. The selection specifier 308 (after operation) now comprises the set of new ranges 318 that identifies the set of new selected cells 304 within the multidimensional array 302.
A multidimensional array store 410 (e.g. a data structure, memory addresses, array of cells, collection of cells, etc.) stores objects comprised within each cell of the multidimensional array 402. A selection specifier 414 specifies a range 418 of selected cells 404 within the multidimensional array 402. The selection specifier 414 comprises an enumerator component 406 configured to receive an enumeration request 408 and produce an enumeration 416 over the range 418 of the set of selected cells 404. The enumeration 416 may return the address of each cell within the range 418. The enumeration 416 may also return the object of each cell within the range 418.
In the example of system 400, the enumerator component 406 detects and receives an enumeration request 408. The enumerator component 406 retrieves the objects (F,G,H,J) contained within the range 418 (addresses (8,2)(8,3)(9,2)(9,3)) from the multidimensional array store 410. The enumerator component 406 returns an enumeration 416 of the objects and addresses of the selected cells 404 in sorted order by row then column.
A multidimensional array store 510 (e.g. a data structure, memory addresses, array of cells, collection of cells, etc.) stores objects comprised within each cell of the multidimensional array 502. A selection specifier 514 specifies a range 518 of selected cells 504 within the multidimensional array 502. The selection specifier 514 comprises a query component 506 configured to receive a query request 508 (e.g. contains(x,y)) and determine whether the query cell (8,3) is contained within the range 518 of selected cells 504. The query component 506 may return a value or any other identification (e.g. Boolean value) indicating if the query cell is contained within the range 518 of selected cells 504.
In the example of system 500, the query component 506 detects and receives a query request 508 from a computer application 512. The query component 506 determines whether the cell address (8,3) is contained within the range 518 of selected cells 504. The query component 506 determines (8,3) is within the range 518 and returns True 516 to the computer application 512. One method the selection specifier can perform to make the query determination is by performing a binary search for 8 (x coordinate) by row ranges within the range 518. If 8 (x coordinate) is found within the row ranges, then the selection specifier performs a binary search for 3 (y coordinate) by column ranges within the range 518. This method illustrates a two-dimensional query determination, but can be extrapolated to any set of dimensions (such as illustrated in the three-dimensional illustration of
Still another embodiment involves a computer-readable medium comprising processor-executable instructions configured to implement one or more of the techniques presented herein. An exemplary computer-readable medium that may be devised in these ways is illustrated in
Although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.
As used in this application, the terms “component,” “module,” “system”, “interface”, and the like are generally intended to refer to a computer-related entity, either hardware, a combination of hardware and software, software, or software in execution. For example, a component may be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer. By way of illustration, both an application running on a controller and the controller can be a component. One or more components may reside within a process and/or thread of execution and a component may be localized on one computer and/or distributed between two or more computers.
Furthermore, the claimed subject matter may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques to produce software, firmware, hardware, or any combination thereof to control a computer to implement the disclosed subject matter. The term “article of manufacture” as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. Of course, those skilled in the art will recognize many modifications may be made to this configuration without departing from the scope or spirit of the claimed subject matter.
Although not required, embodiments are described in the general context of “computer readable instructions” being executed by one or more computing devices. Computer readable instructions may be distributed via computer readable media (discussed below). Computer readable instructions may be implemented as program modules, such as functions, objects, Application Programming Interfaces (APIs), data structures, and the like, that perform particular tasks or implement particular abstract data types. Typically, the functionality of the computer readable instructions may be combined or distributed as desired in various environments.
In other embodiments, device 712 may include additional features and/or functionality. For example, device 712 may also include additional storage (e.g., removable and/or non-removable) including, but not limited to, magnetic storage, optical storage, and the like. Such additional storage is illustrated in
The term “computer readable media” as used herein includes computer storage media. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions or other data. Memory 718 and storage 720 are examples of computer storage media. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVDs) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by device 712. Any such computer storage media may be part of device 712.
Device 712 may also include communication connection(s) 726 that allows device 712 to communicate with other devices. Communication connection(s) 726 may include, but is not limited to, a modem, a Network Interface Card (NIC), an integrated network interface, a radio frequency transmitter/receiver, an infrared port, a USB connection, or other interfaces for connecting computing device 712 to other computing devices. Communication connection(s) 726 may include a wired connection or a wireless connection. Communication connection(s) 726 may transmit and/or receive communication media.
The term “computer readable media” may include communication media. Communication media typically embodies computer readable instructions or other data in a “modulated data signal” such as a carrier wave or other transport mechanism and includes any information delivery media. The term “modulated data signal” may include a signal that has one or more of its characteristics set or changed in such a manner as to encode information in the signal.
Device 712 may include input device(s) 724 such as keyboard, mouse, pen, voice input device, touch input device, infrared cameras, video input devices, and/or any other input device. Output device(s) 722 such as one or more displays, speakers, printers, and/or any other output device may also be included in device 712. Input device(s) 724 and output device(s) 722 may be connected to device 712 via a wired connection, wireless connection, or any combination thereof. In one embodiment, an input device or an output device from another computing device may be used as input device(s) 724 or output device(s) 722 for computing device 712.
Components of computing device 712 may be connected by various interconnects, such as a bus. Such interconnects may include a Peripheral Component Interconnect (PCI), such as PCI Express, a Universal Serial Bus (USB), firewire (IEEE 1394), an optical bus structure, and the like. In another embodiment, components of computing device 712 may be interconnected by a network. For example, memory 718 may be comprised of multiple physical memory units located in different physical locations interconnected by a network.
Those skilled in the art will realize that storage devices utilized to store computer readable instructions may be distributed across a network. For example, a computing device 730 accessible via network 728 may store computer readable instructions to implement one or more embodiments provided herein. Computing device 712 may access computing device 730 and download a part or all of the computer readable instructions for execution. Alternatively, computing device 712 may download pieces of the computer readable instructions, as needed, or some instructions may be executed at computing device 712 and some at computing device 730.
Various operations of embodiments are provided herein. In one embodiment, one or more of the operations described may constitute computer readable instructions stored on one or more computer readable media, which if executed by a computing device, will cause the computing device to perform the operations described. The order in which some or all of the operations are described should not be construed as to imply that these operations are necessarily order dependent. Alternative ordering will be appreciated by one skilled in the art having the benefit of this description. Further, it will be understood that not all operations are necessarily present in each embodiment provided herein.
Moreover, the word “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous over other aspects or designs. Rather, use of the word exemplary is intended to present concepts in a concrete fashion. As used in this application, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise, or clear from context, “X employs A or B” is intended to mean any of the natural inclusive permutations. That is, if X employs A; X employs B; or X employs both A and B, then “X employs A or B” is satisfied under any of the foregoing instances. In addition, the articles “a” and “an” as used in this application and the appended claims may generally be construed to mean “one or more” unless specified otherwise or clear from context to be directed to a singular form.
Also, although the disclosure has been shown and described with respect to one or more implementations, equivalent alterations and modifications will occur to others skilled in the art based upon a reading and understanding of this specification and the annexed drawings. The disclosure includes all such modifications and alterations and is limited only by the scope of the following claims. In particular regard to the various functions performed by the above described components (e.g., elements, resources, etc.), the terms used to describe such components are intended to correspond, unless otherwise indicated, to any component which performs the specified function of the described component (e.g., that is functionally equivalent), even though not structurally equivalent to the disclosed structure which performs the function in the herein illustrated exemplary implementations of the disclosure. In addition, while a particular feature of the disclosure may have been disclosed with respect to only one of several implementations, such feature may be combined with one or more other features of the other implementations as may be desired and advantageous for any given or particular application. Furthermore, to the extent that the terms “includes”, “having”, “has”, “with”, or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term “comprising.”
