Array.sort() Possibilities : Array « Language Basics « JavaScript DHTML






  1. JavaScript DHTML
  2. Language Basics
  3. Array

Array.sort() Possibilities

  
<HTML>
<HEAD>
<TITLE>Array.sort()</TITLE>
<SCRIPT LANGUAGE="JavaScript1.1">
solarSys = new Array(9)
solarSys[0] = "M"
solarSys[1] = "V"
solarSys[2] = "E"
solarSys[3] = "M"
solarSys[4] = "J"
solarSys[5] = "S"
solarSys[6] = "U"
solarSys[7] = "N"
solarSys[8] = "P"

// comparison functions
function compare1(a,b) {
    // reverse alphabetical order
    if (a > b) {return -1}
    if (b > a) {return 1}
    return 0
}
function compare2(a,b) {
    // last character of planet names
    var aComp = a.charAt(a.length - 1)
    var bComp = b.charAt(b.length - 1)
    if (aComp < bComp) {return -1}
    if (aComp > bComp) {return 1}
    return 0
}
function compare3(a,b) {
    return a.length - b.length
}


function sortIt(form, compFunc) {
    var delimiter = ";"
    if (compFunc == null) {
        solarSys.sort()
    } else {
        solarSys.sort(compFunc)
    }
    form.output.value = unescape(solarSys.join(delimiter))
}
</SCRIPT>
<BODY onLoad="document.forms[0].output.value = unescape(solarSys.join(';'))">
<H2>Sorting array elements</H2>
This document contains an array of planets in our solar system.<HR>
<FORM>
Click on a button to sort the array:<P>
<INPUT TYPE="button" VALUE="Alphabetical A-Z" onClick="sortIt(this.form)">
<INPUT TYPE="button" VALUE="Alphabetical Z-A" onClick="sortIt(this.form,compare1)">
<INPUT TYPE="button" VALUE="Last Character" onClick="sortIt(this.form,compare2)">

<INPUT TYPE="button" VALUE="Name Length" onClick="sortIt(this.form,compare3)">
<INPUT TYPE="button" VALUE="Reload Original" onClick="self.location.reload()">
<INPUT TYPE="text" NAME="output" SIZE=62>
</TEXTAREA>
</FORM>
</BODY>
</HTML>








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