The way JavaScript sorts tables or elements by text, numbers, or dates.

This example describes how JavaScript sorts tables or elements by text, numbers, or dates. Share to everyone for your reference. The implementation methods are as follows:

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Sorting table columns correctly by text, number or date. There are other//versions, plugins, etc., for this but they the either are restricted to specific//date formats, or Requir E EVERY row-element to be given a sort attribute; Mine//can handle many different date and number formats, and even allows for specific//cells ' may not ' conform to T He overall date/number the format for that column. My version also enables sorting of element Hierarchies:such as a DIV containing//p-paragraphs and Spans-this could Even is an image-gallery containing prices//or dates within spans. Very Efficient as well!! example:andrew.dx.am/sortgallerydel.html//Addsorttotables (); 'll make the table headers clickable, to sort columns in//ascending or descending order, for any tables with class= "Sor Tit ". SortTable (TBL, col); Would sort the table (TBL is a ID or Table object) by//The supplied column index (indexed from 0) in ascending or Descen Ding order. Addsortbydate (TBL, col, DAtemask); Enables sorting of a column by date,///specified by a date-mask such as ' Dd-mmm-yy '. Addsortbynumber (TBL, col); Enables sorting of a column by number. This assumes A//period. As the decimal separator (if present); It ignores any other non-numeric//characters. Sortelements (Parentel, Childtag, Coltag, Colindex); would sort (non-table)//elements in ascending or descending order. For example, an UL containing LIs//and spans. COLINDEX specifies which span to sort; There may is more than one in//the LI (0 indexed). Example:sortelements (' divID ', ' p ', ' span ', 2); 3rd span within each paragraph. AddSortByDate2 (Parentel, Childtag, Coltag, Colindex, Datemask); and//AddSortByNumber2 (Parentel, Childtag, Coltag, Colindex)//provide the same feature-set as Addsortbydate and AddSort Bynumber does//for tables, but for element hierarchies. If There are dates or numbers in a column (or element) which don ' t meet the//Date-mask or number formatting necessary To sort correctly, then these individual//elements can is given the attribute "sort" and they would still sort correctly ! For example, with a date column <td sort= "2012/12/20" > would still sort A//cell correctly. This format ' YYYY/MM/DD ' is converted into a Date () object.) var monthnames = ["January", "February", "March", "April", "may", "June", "July", "August", "September", "October", "Novem ber "," December "]; var daynames = ["Sunday", "Monday", "Tueday", "Wednesday", "Thursday", "Friday", "Saturday"]; var shortmths = ["No More", "Feb", "Mar", "APR", "may", "June", "O", "Aug", "Sep", "Oct", "Nov", "Dec"]; var shortdays = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"]; var addevent = function (Elem, EventType, func) {//Helper function. if (elem.addeventlistener) addevent = function (el EM, EventType, func) {Elem.addeventlistener (EventType, Func, false); else if (elem.attachevent) addevent = function (Elem, EventType, func) {elem.attachevent (' on ' + EventtypE, func); }; else addevent = function (Elem, EventType, func) {elem[' on ' + eventtype] = func;}; Addevent (Elem, EventType, func); }; Sort methods/algorithms Attributed:var sorttable = function (tbl, col) {//could be called directly (sortelements, ' TR ', ' TD ', Col; }; var sortelements = function (Parentel, Childtag, Coltag, Colindex) {//Example use:sortelements (' table1 ', ' tr ', ' TD ', 2)// or sortelements (' List1 ', ' li ')//or sortelements (' divname ', ' p ', ' span ', 3) var i, J, cTags = {}, startAt = 0, Childlen, aCh ILD, Elem, sortby, content, Elems = [], Sortedlen, Frag, Hdrslen, HDR; var parent = (typeof Parentel = = ' string ')? document.getElementById (Parentel): Parentel; var asctext = function (A, B) {//Sort () by. data as text var x = a.data, y = b.data, Xnum = parsefloat (x), ynum = Parsef Loat (y); Check if each begin with a number ... if (!isnan (xnum) &&!isnan (ynum) && (xnum-ynum)) return xnum-ynum; Return ((x < y)?-1: ((x > Y)? 1:0)); }; VarDesctext = function (A, B) {//Sort () by. data var x = a.data, y = b.data, Xnum = parsefloat (x), ynum = parsefloat (y); Check if each begin with a number ... if (!isnan (xnum) &&!isnan (ynum) && (ynum-xnum)) return ynum-xnum; Return ((x > Y)?-1: ((x < y)? 1:0)); }; var ascnum = function (A, B) {//used with dates as OK return a.data-b.data;}; var descnum = function (A, b) {return b.data-a.data;}; if (parent.nodeName.toLowerCase () = = ' table ') {if (Childtag = = ' tr ') {sortby = Parent.rows[0].cells[colindex].sortby | | ' Text '; Parent = Parent.tbodies[0] | | Parent if (parent.rows[0].cells[0].nodename.tolowercase () = = ' th ') {startAt = 1;}} CTags = Parent.getelementsbytagname (Childtag); if (typeof Colindex = = ' undefined ') {sortby = ' text ';//Sort simple lists or paragraphs as text} for (i = startAt, ch Ildlen = Ctags.length; i < Childlen; i++) {///.. Go forward examining each child achild = ctags[i]; Elem = (coltag)? Achild.geteleMentsbytagname (Coltag) [Colindex]: achild; if (elem) {if (!sortby) {//sorting non-table columns. SortBy = (typeof elem.numbervalue '!= ')? ' Number ': ((typeof elem.datevalue!= ' undefined ')? ' Date ': ' Text '); Switch (sortby) {//Can supply ' sort ' attributes to enable sorting of numbers, etc./For example, <td sort= ' 20 11/02/12 ' > for a date. Case ' text ': content = (Elem.getattribute (' sort ') | | elem.firstChild.nodeValue). toLowerCase (); Break Case ' number ': content = Elem.numbervalue; Break Case ' Date ': content = Elem.datevalue; Break Default:content = (Elem.getattribute (' sort ') | | | elem.firstChild.nodeValue). toLowerCase (); Break } j = Elems.length; if (!achild.id) achild.id = ' Tempsortid ' + j; Elems[j] = {data:content, tempID:aChild.id}; }//The following'll determine if the TABLE/ETC has already been//by the sorted column or tag. If So, it would sort in ascending or descending//order. It creates custom element properties to the Parent element to//Remember the previous sort details. if (typeof Colindex = = ' undefined ') colindex = 0; if (parent.prevtag && Parent.prevtag = = (typeof Coltag = = ' undefined ') (Childtag:coltag)) {if (PARENT.PREVC OL = = Colindex) {//sorting by the same column as previously parent.prevsort = (Parent.prevsort = ' asc ')? ' desc ': ' ASC '; else {//sorting by any other column Parent.prevcol = colindex; parent.prevsort = ' ASC ';}} else {//sorting for the "1st time" or by a different tag Parent.prevtag = (typeof Coltag = ' undefined ')? childtag:col TAG); Parent.prevcol = Colindex; Parent.prevsort = ' ASC '; } if (Parent.prevsort = = ' desc ') {//' desc ' is the previous sort order ... switch (sortby) {case ' text ': elems.sor T (Desctext); Break Case ' number ': Elems.sort (Descnum); Break Case ' Date ': Elems.sort (Descnum); Break Default:elems.sort (Desctext); Break } else {switch (sortby) {case ' text ': Elems.sort (Asctext), break, case ' number ': Elems.sort (ascnum); BreaK Case ' Date ': Elems.sort (Ascnum); Break Default:elems.sort (Asctext); Break } Frag = Document.createdocumentfragment (); for (i = 0, Sortedlen = elems.length i < Sortedlen; i++) {elem = document.getElementById (elems[i].tempid); Frag.appen Dchild (Elem); if ((elem.id). substr (0,10) = = ' Tempsortid ') elem.removeattribute (' id '); } parent.appendchild (Frag); Elems = null; return parent.prevsort; not currently used}; var addsorttotables = function () {//.. If table has Class-name ' sortit ' var tables = document.getelementsbytagname (' table '), I, J, Tbllen, TBL, HDRs, Hdrslen; function Preservesortscope (a,b,c,d) {return function () {//Assign-sortelements fn. to a table header sortelements (a , B, C, D); }//Add sorting to table headers for (i = 0, Tbllen = tables.length i < Tbllen; i++) {tbl = Tables[i]; if (tbl. Classname.indexof (' sortit ') + 1) {HDRs = tbl.getelementsbytagname (' th '); if (HDRs) {for (j = 0, Hdrslen = hdrs.length ; J < Hdrslen; J + +) {addevent(Hdrs[j], ' click ', Preservesortscope (TBL, ' tr ', ' TD ', j)); If there ' s no title already, add "click to sort" if (!hdrs[j].title) hdrs[j].setattribute (' title ', ' Click to sort '); } } } } }; var addsortbydate = function (tbl, col, datemask) {//Input:the table name (or object), a column index (or array)//and A date mask (' dd-mmm-yy ')//Adds a sortby = ' Date ' property to the ' the ' the ' the ' the ' the ' the ' the ' the ' the ' the ' I s a header row var i, Rlen, cell; while (col.length) addsortbydate (Tbl,col.pop (), datemask); if ((col instanceof Array) | | | isNaN (COL)) return; var tbl = (typeof tbl = = ' string ')? document.getElementById (TBL): TBL; Tbl.rows[0].cells[col].sortby = ' Date '; AddSortByDate2 (TBL, ' tr ', ' TD ', Col, Datemask); }; var AddSortByDate2 = function (Parentel, Childtag, Coltag, Colindex, datemask) {var kids, startAt = 0, I, Rlen, cell; var Parent = (typeof Parentel = = ' string ')? document.getElementById (Parentel): Parentel; if (parent.nodeName.toLowerCase () = = ' table ') { Parent = Parent.tbodies[0] | | Parent StartAt = (parent.rows[0].cells[0].nodename.tolowercase () = = ' th ') * 1; } kids = Parent.getelementsbytagname (Childtag); for (i = startAt, Rlen = Kids.length i < Rlen; i++) {cell = Kids[i].getelementsbytagname (Coltag) [Colindex]; if (cell {if (typeof cell.numbervalue!= ' undefined ') delete cell.numbervalue;//The above enables A date sort//(although v. unlikely) if (Cell.getattribute (' sort ')) {//Use the sort attribute if present Cell.datevalue = New Date (Cell.getattribute (' sort ')); else {cell.datevalue = new Date (Stringtodate (Cell.firstChild.nodeValue, Datemask));} if (cell.dateValue.toString () = "NaN" | | cell.dateValue.toString () = = "Invalid Date") {cell.datevalue = 0;}} } }; var addsortbynumber = function (tbl, col) {//COL is a column index or array of indices/would ignore the Uming It is a header row var i, Rlen, cell, tempnum; while (col.length) Addsortbynumber (Tbl,col.pop ()); IF ((col instanceof Array) | | | isNaN (COL)) return; TBL = (typeof tbl = = ' string ')? document.getElementById (TBL): TBL; Tbl.rows[0].cells[col].sortby = ' number '; AddSortByNumber2 (TBL, ' tr ', ' TD ', COL); }; var AddSortByNumber2 = function (Parentel, Childtag, Coltag, Colindex) {var kids, startAt = 0, I, Rlen, cell, tempnum; VA R parent = (typeof Parentel = = ' string ')? document.getElementById (Parentel): Parentel; if (parent.nodeName.toLowerCase () = = ' table ') {parent = Parent.tbodies[0] | | parent; startAt = (parent.rows[0].cells[0) . nodename.tolowercase () = = ' th ') * 1; } kids = Parent.getelementsbytagname (Childtag); for (i = startAt, Rlen = Kids.length i < Rlen; i++) {cell = Kids[i].getelementsbytagname (Coltag) [Colindex]; if (cell) {if (typeof cell.datevalue!= ' undefined ') delete cell.datevalue;//The above enables the switching from a date to a numb ER sort//(although v. unlikely) Tempnum = Cell.getattribute (' sort ') | | Cell.firstChild.nodeValue; Tempnum = Tempnum.replace (/[^0-9.-)/g, ""); Cell.numbervalue = parsefloat (tempnum); if (isNaN (cell.numbervalue)) Cell.numbervalue = 0.0; } } }; var stringtodate = function (Sdate, Sformat, cutOff) {//Input:a date value as a string, it ' s format as a string e.g. ' d D-mmm-yy '//optional:a cutoff (integer) for 2 digit years. If no ' d ' appears in the format string then the 1st of the month is assumed. If the cut-off is then the value would be converted//to 2020; If the then this would be converted to 1940. If no cut-off is supplied then ' would be pre-pended to the year (YY). Output:a string in the format ' yyyy/mm/dd ' or '/won't be attempt to convert certain combinations e.g. DMM, MDD, DD M, Yyyyd. var sparsed, Fndsingle; Sparsed would be constructed in the format ' yyyy/mm/dd ' sdate = sdate.tostring (). toUpperCase (); Sformat = Sformat.touppercase (); if (Sformat.search (/mmmm| mmm/) + 1) {//replace mar/march with, etc. sdate = sdate.replace (new RegExp (' + shortmths.Join (' | ') + ') [a-z]* ', ' gi '], function (m) {var i = shortmths.indexof (M.charat (0). toUpperCase () + M.SUBSTR (1, 2). Tolowerc ASE ()) + 1; Return ((I < 10)? "0" + I: "" + i). toString (); Sformat = Sformat.replace (/mmmm| mmm/g, ' MM '); } if (Sformat.search (/dddd| ddd/) + 1) {//replace Tue/tuesday, etc. with ' Sdate = Sdate.replace (new RegExp (' + shortdays.join (' | ') + ') [a-z]* ', ' GI '), '); Sformat = Sformat.replace (/dddd| Ddd/g, ""); } sdate = Sdate.replace (/(^| d) (d) (=d|$)/g, function ($, $, $) {//single digits 2 with 0 ' + $}); Sformat = Sformat.replace (/(^|[ ^dmy]) (d| M) (=[^dmy]|$)/g, function ($, $) {return $ + $ + $//replace D or M with DD and MM}); Are there still single Ds or Ms? Fndsingle = Sformat.search (/(^|[ ^D]) D ([^d]|$) | (^| [^m]) M ([^m]|$)/) +1; if (Fndsingle) return "; Don't attempt to parse, for example, ' DMM ' Sformat = Sformat.replace (/(^|[ ^y]) (YY) (? =[^y]|$)/g, function ($, $, $, index) {var tempdate = sdate.substr (0, Index +1); Tempdate + = (cutOff)? ((parseint (SDATE.SUBSTR (index + 1, 2), ten) > CutOff)? ' 19 ': ' 20 '): ' 20 '; Tempdate + = SDATE.SUBSTR (index + 1); Sdate = tempdate; Return $ + $ + $; }); sparsed = (' Yyyy/mm/dd '). Replace (/yyyy| mm| dd/g, function (m) {return (Sformat.indexof (m) + 1)? Sdate.substr (Sformat.indexof (M), m.length): ";}"; if (Sparsed.charat (0) = = '/') {//If no specified, assume the current year sparsed = (new Date (). getFullYear ()) + SP arsed; } if (Sparsed.charat (sparsed.length-1) = = '/') {//If no date, assume the 1st of month sparsed + + ';}//should End up with characters ... return (Sparsed.length = 10)? sparsed: '; };

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