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Javascript String 字符串操作包

　　本文标签：String,字符串

<script> 
if (typeof jscript == undefined) { 
jscript = function() { } 
} 
jscript.string = function() { } 
jscript.string.substrCount = function(inStr, inSearchStr) { 
if (inStr == null || inStr == "" || 
inSearchStr == null || inSearchStr == "") { 
return 0; 
} 
var splitChars = inStr.split(inSearchStr); 
return splitChars.length - 1; 
} // End substrCount(). 
jscript.string.stripChars = function(inStr, inStripOrAllow, inCharList) { 
if (inStr == null || inStr == "" || 
inCharList == null || inCharList == "" || 
inStripOrAllow == null || inStripOrAllow == "") { 
return ""; 
} 
inStripOrAllow = inStripOrAllow.toLowerCase(); 
var outStr = ""; 
var i; 
var j; 
var nextChar; 
var keepChar; 
for (i = 0; i < inStr.length; i++) { 
nextChar = inStr.substr(i, 1); 
if (inStripOrAllow == "allow") { 
keepChar = false; 
} else { 
keepChar = true; 
} 
for (j = 0; j < inCharList.length; j++) { 
checkChar = inCharList.substr(j, 1); 
if (inStripOrAllow == "allow" && nextChar == checkChar) { 
keepChar = true; 
} 
if (inStripOrAllow == "strip" && nextChar == checkChar) { 
keepChar = false; 
} 
} 
if (keepChar == true) { 
outStr = outStr + nextChar; 
} 
} 
return outStr; 
} // End stripChars(). 
jscript.string.strContentValid = function(inString, inCharList, inFromExcept) { 
if (inString == null || inCharList == null || inFromExcept == null || 
inString == "" || inCharList == "") { 
return false; 
} 
inFromExcept = inFromExcept.toLowerCase(); 
var i; 
if (inFromExcept == "from_list") { 
for (i = 0; i < inString.length; i++) { 
if (inCharList.indexOf(inString.charAt(i)) == -1) { 
return false; 
} 
} 
return true; 
} 
if (inFromExcept == "not_from_list") { 
for (i = 0; i < inString.length; i++) { 
if (inCharList.indexOf(inString.charAt(i)) != -1) { 
return false; 
} 
} 
return true; 
} 
} // End strContentValid(). 
jscript.string.replace = function(inSrc, inOld, inNew) { 
if (inSrc == null || inSrc == "" || inOld == null || inOld == "" || 
inNew == null || inNew == "") { 
return ""; 
} 
while (inSrc.indexOf(inOld) > -1) { 
inSrc = inSrc.replace(inOld, inNew); 
} 
return inSrc; 
} // End replace(). 
jscript.string.leftTrim = function(inStr) { 
if (inStr == null || inStr == "") { 
return null; 
} 
var j; 
for (j = 0; inStr.charAt(j) == " "; j++) { } 
return inStr.substring(j, inStr.length); 
} // End leftTrim(). 
jscript.string.rightTrim = function(inStr) { 
if (inStr == null || inStr == "") { 
return null; 
} 
var j; 
for (j = inStr.length - 1; inStr.charAt(j) == " "; j--) { } 
return inStr.substring(0, j + 1); 
} // End rightTrim(). 
jscript.string.fullTrim = function(inStr) { 
if (inStr == null || inStr == "") { 
return ""; 
} 
inStr = this.leftTrim(inStr); 
inStr = this.rightTrim(inStr); 
return inStr; 
} // End fullTrim(). 
</script> 
<div style="padding-bottom: 4px; background-color: #ffffe0; padding-left: 4px; padding-right: 4px; font-family: arial; font-size: 10pt; font-weight: bold; padding-top: 4px" id="jscript_string_div">substrCount()-Count how many times the string "wo" appears in the string "How much wood would a woodchuck chuck if a woodchuck could chuck wood" (5)  
<br><br>stripChars()-Strip the characters aeio from the string "Denny Crane is cool!", then strip all characters EXCEPT DenyCran  
<br><br>strContentValid()-Validate that the string "12345" only contains numbers (true), and then that the string "abc123" does not contain the character b (false)  
<br><br>replace()-Replace "wood" with "metal" in the string "How much wood would a woodchuck chuck if a woodchuck could chuck wood"  
<br><br>leftTrim()-Trim leading spaces from the string "  test" (will display length before (6) and after (4)  
<br><br>rightTrim()-Trim trailing spaces from the string "test  " (will display length before (6) and after (4))  
<br><br>fullTrim()-Trim both leading and trailing spaces from the string "  test  " (will display length before (8) and after (4))  
<br><br>breakLine()-Break up the string "All work and no play makes Homer go crazy" into 10 character chunks  
<br><br></div> 
<div id="c_jquery_test" style="display:none"></div>

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