A method by which JavaScript sorts tables or elements by text, numbers, or dates _javascript tips

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Author: User
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This article describes how JavaScript sorts tables or elements by text, numbers, or dates. Share to everyone for your reference. The implementation method is as follows:

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 requ IRE EVERY row-element to be given a sort attribute;  Mine//can handle many different date and number formats, and even allows for specific//cells 
The overall date/number format for that column. My version also enables sorting of element Hierarchies:such as a DIV containing//p-paragraphs and Spans-this Coul D even be a image-gallery containing prices//or dates within.
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 all tables with class= ' so
Rtit ". 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 desce
Nding 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 Addsor
Tbynumber 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 this individual//elements can be given the attribute "sort" and they'll s
Till 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", "No
Vember "," 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 (Elem, 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 to be called directly sortelements (
TBL, ' 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, child
  Len, Achild, 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), Ynu
      m = parsefloat (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));
  }; var desctext = function (A, B) {//Sort () by. data var x = a.data, y = b.data, Xnum = parsefloat (x), ynum = par
      Sefloat (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, Childlen = Ctags.lengt H 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!= ' undefined ')? ' Number ': ((typeof elem.datevalue!= ' undefined ')?
      ' Date ': ' Text ');
      Switch (sortby) {//Can supply ' sort ' attributes to enable sorting of numbers, etc.
        For example, <td sort= ' 2011/02/12 ' > 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.prevcol = = Colindex) {//sorting by the same column as previously Paren T.prevsort = (Parent.prevsort = = ' ASC ')?
    ' desc ': ' ASC ';
      else {//sorting by no 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:coltag);
    Parent.prevcol = Colindex;
  Parent.prevsort = ' ASC ';
    } if (Parent.prevsort = = ' desc ') {//' desc ' is the previous sort order ...
      Switch (sortby) {case ' text ': Elems.sort (Desctext); 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); 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.appendchild (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, HDRs
  Len;
      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 ', Prese
          Rvesortscope (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-mm
  M-yy ')//Adds a sortby = ' Date ' property to the ' the ' the ' the ' the ' the ', ' ignore the ' 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] | |
  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 switching from a # to a date sort//(although v. unlikely) if (Cell.getattribute ('
      Sort ')) {//Use 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.D
      Atevalue = 0;
} 
    }
  }
};  var addsortbynumber = function (tbl, col) {//COL is a column index or array of indices//would ignore the
  Assuming 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; 
    var parent = (typeof Parentel = = ' string ')?
  document.getElementById (Parentel): Parentel;
    if (parent.nodeName.toLowerCase () = = ' table ') {parent = Parent.tbodies[0] | |
  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 switching from a date to a number sort//(although v. unlikely) Tempnum = Cell.getattrib Ute (' 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.
  ' Dd-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,
  DDM, 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 = shortmth
      S.indexof (M.charat (0). toUpperCase () + M.SUBSTR (1, 2). toLowerCase ()) + 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 return $ + ' 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
  ()) + sparsed;
  } if (Sparsed.charat (sparsed.length-1) = = '/') {//If no date, assume the 1st of the month sparsed = ' 01 ';
  }//should end up with characters. return (Sparsed.length = 10)?
sparsed: ';

 };

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