We are pleased to announce the release of version 2.5.0. Featured are a handful of new areas of functionality and numerous bug fixes.

A summary of changes is available in the Release Notes. A full list of changes is available in the changelog.

Release Notes

The most notable changes in this release are:

Breaking Change

• Close spreadsheet and row's iterator required, the user should be close the stream after using the row's iterator, and close the spreadsheet after opening an existing spreadsheet
• Change ReadZipReader as an implementation of the File, extract spreadsheet with given options, and support extract in memory or touching the filesystem
• Remove unnecessary exported variable XMLHeader, we can using encoding/xml package's xml.Header instead of it
• Remove unused exported error variable ErrToExcelTime

Notable Features

• New API: SetRowStyle support for set style for the rows, related issue #990
• New API: GetCellType support for get the cell's data type, related issue #417 and #520
• New API: SetAppProps and GetAppProps support to set and get document application properites, related issue #1095
• GetCellValue, GetRows, GetCols, Rows and Cols support to specify read cell with raw value, related issue #621
• New support 95 formula functions: ACCRINT, ACCRINTM, ADDRESS, AMORDEGRC, AMORLINC, AVEDEV, AVERAGEIF, CHIDIST, CONFIDENCE, CONFIDENCE.NORM, COUNTIF, COUNTIFS, COUPDAYBS, COUPDAYS, COUPDAYSNC, COUPNCD, COUPNUM, COUPPCD, DATEVALUE, DAY, DAYS, DELTA, DEVSQ, DISC, DURATION, ERF, ERF.PRECISE, ERFC, ERFC.PRECISE, GEOMEAN, GESTEP, IFNA, IFS, INDEX, INTRATE, ISFORMULA, ISLOGICAL, ISREF, ISOWEEKNUM, MATCH, MAXA, MAXIFS, MDURATION, MINIFS, MINUTE, MONTH, ODDFPRICE, PERCENTILE.EXC, PERCENTRANK.EXC, PERCENTRANK.INC, PERCENTRANK, PRICE, PRICEDISC, PRICEMAT, PV, QUARTILE.EXC, RANK, RANK.EQ, RATE, RECEIVED, RRI, SHEETS, SLN, STANDARDIZE, STDEV.P, STDEVP, SWITCH, SYD, TBILLEQ, TBILLPRICE, TBILLYIELD, TEXTJOIN, TIME, TRANSPOSE, TRIMMEAN, VALUE, VAR, VAR.S, VARA, VARPA, VDB, WEEKDAY, WEIBULL, WEIBULL.DIST, XIRR, XLOOKUP, XNPV, XOR, YEAR, YEARFRAC, YIELD, YIELDDISC, YIELDMAT, Z.TEST, ZTEST, related issue #1002
• Formula calculation engine support nested calc for IF formula, related issue #987
• Formula calculation engine support get shared formula, related issue #844
• Formula calculation engine support text comparison, related issue #998
• Support specify the formula in the data validation range, related issue #1012
• Support specified unzip size limit on open file options, avoid zip bombs vulnerability attack
• SetCellFormula now support set the shared formula
• UpdateLinkedValue will skip macro sheet, related issue #1014
• Fix AddPicture created duplicate image in some cases, caused by incorrect internal relationships ID calculation, related issue #1017
• AddShape support set line width of add the shape, related issue #262
• New options UnzipXMLSizeLimit have been added, support to specifies the memory limit on unzipping worksheet and shared string table in bytes
• An error will be returned if given an invalid custom number format when creating a new style, related issue #1028
• Now support set row style in the stream writer
• Stream writer will create a time number format for time type cells, related issue #1107
• Now support specify compact and outline for the pivot table, related issue #1029
• Support get current rows/columns and total rows/columns in the stream reader, related PR #1054
• Now support time zone location when set cell value, related issue #1069
• Export 7 errors so users can act differently on different type of errors

Improve the Compatibility

• Improve compatibility with row element with r="0" attribute
• Preserve XML control character
• Improve the compatibility of style settings with Apple Numbers, related issue #1059
• Support multi-byte language on set header footer, related issue #1061
• Preserve horizontal tab character when set the cell value, related issue #1108

Bug Fixes

• Fix the data validation deletion failed, resolve issue #979
• Fix set data validation drop list failed in some cases, resolve issue #986
• Fix formula calculation engine LOOKUP doesn't handle array form correctly, resolve issue #994
• Fix formula calculation engine LOOKUP can only find exact match, resolve issue #997
• Fix formula percentages calculated incorrectly, resolve issue #993
• Fix panic caused by incorrect cell read on some case
• Fix conditional format bottom N not working
• Fix time parse accuracy issue, resolve issue #1026 and #1030
• Fix build-in scientific number format failed, resolve issue #1027
• Fix small float parse error in some case, resolve issue #1031
• Fix worksheet deletion failed in some case
• Fix build-in time number format parse error, resolve issue #1060
• Fix NewStyle returned incorrect style ID in some case
• Fix merged cell range error after row/column insert/deletion in some corner case

Performance

• Merge cell time cost speed up, based on the previously released version time cost decrease over 90%
• Improve streaming reading performance, unzip shared string table to system temporary file when large inner XML, based on the previously released version, memory usage decreased about 60% at most, related issue #1096
• Worksheet list read speed up
• Merge column styles to reduce spreadsheet size, resolve issue #1057

Miscellaneous

• The dependencies module has been updated
• Unit tests and godoc updated
• Documentation website with multilingual: Arabic, German, Spanish, English, French, Russian, Chinese, Japanese, and Korean, which has been updated