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JavaScript Tutorial/String/String comparisons - История изменений
2026-04-04T04:39:52Z
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Admin: 1 версия
2010-05-26T08:24:31Z
<p>1 версия</p>
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Admin
http://wbex.ru/index.php?title=JavaScript_Tutorial/String/String_comparisons&diff=8720&oldid=prev
в 18:52, 25 мая 2010
2010-05-25T18:52:56Z
<p></p>
<p><b>Новая страница</b></p><div>== Compare two strings==<br />
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<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<HTML><br />
<BODY><br />
<SCRIPT language="JavaScript"><br />
<!--<br />
var myVar="AA";<br />
<br />
if(myVar=="AA") {<br />
window.alert("AA");<br />
} else {<br />
window.alert("Not AA");<br />
}<br />
//--><br />
</SCRIPT><br />
</BODY><br />
</HTML></source><br />
<br />
<br />
<br />
== localeCompare==<br />
<br />
<p>localeCompare() helps sort string values</p><br />
<p>localeCompare() method takes the string to compare to.</p><br />
<p>localeCompare() returns one of three values:</p><br />
<p>If the String object comes alphabetically before the string argument, a negative number is returned.</p><br />
<p>If the String object is equal to the string argument, 0 is returned.</p><br />
<p>If the String object comes alphabetically after the string argument, a positive number is returned.</p><br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
var oStringObject = new String("yellow");<br />
alert(oStringObject.localeCompare("brick")); //outputs "1"<br />
alert(oStringObject.localeCompare("yellow")); //outputs "0"<br />
alert(oStringObject.localeCompare ("zoo")); //outputs "-1"</source><br />
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<br />
<br />
== String comparisons==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<html><br />
<head><br />
<title>String comparisons</title><br />
<script type="text/javascript" language="javascript"><br />
<!-- //<br />
onload = function(){<br />
var firstString = new String("AAA");<br />
var secondString = new String("aaA");<br />
document.write("<h3>Direct comparison of the two strings</h3>");<br />
var comparison = (firstString==secondString);<br />
document.write(comparison);<br />
}<br />
// --><br />
</script><br />
</head><br />
<body><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== String comparisons by converting strings to its uppercase form==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
<html><br />
<head><br />
<title>String comparisons</title><br />
<script type="text/javascript" language="javascript"><br />
<!-- //<br />
onload = function(){<br />
var firstString = new String("AAA");<br />
var secondString = new String("aaA");<br />
document.write("<h3>Comparison after conversion to upper case</h3>");<br />
var firstUpperString = firstString.toUpperCase();<br />
var secondUpperString = secondString.toUpperCase();<br />
document.write((firstUpperString==secondUpperString));<br />
}<br />
// --><br />
</script><br />
</head><br />
<body><br />
</body><br />
</html></source><br />
<br />
<br />
<br />
== Use if statement with String.localeCompare==<br />
<br />
<br />
<br />
<br />
<!-- start source code --><br />
<br />
<source lang="javascript"><br />
var oStringObject1 = new String("yellow");<br />
var oStringObject2 = new String("brick");<br />
var iResult = sTestString.localeCompare("brick");<br />
if(iResult < 0) {<br />
alert(oStringObject1 + "comes before "+ oStringObject2);<br />
} else if (iResult > 0) {<br />
alert(oStringObject1 + "comes after "+ oStringObject2);<br />
} else {<br />
alert("The two strings are equal");<br />
}</source></div>