Javascript String 字符串操作包
2024-05-06 14:26:53
供稿：网友
核心代码:
代码如下:
/**
* jscript.string package
* This package contains utility functions for working with strings.
*/
if (typeof jscript == 'undefined') {
jscript = function() { }
}
jscript.string = function() { }
/**
* This function searches a string for another string and returns a count
* of how many times the second string appears in the first.
*（返回字符串中某子串出现的次数）
* @param inStr The string to be searched.
* @param inSearchStr The string to search for.
* @return The number of times inSearchStr appears in inStr,
* or 0 if inStr or inSearchStr is null or a blank string.
*/
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().
/**
* This function will take take an input string and either strip any
* character that appears in a given list of characters, or will strip any
* character that does NOT appear in a given list of characters.
*（此函数用来屏蔽或者保留 "inCharList" 中的字符，取决于参数 "inStripOrAllow"）
* @param inStr The string to strip characters.
* @param inStripOrAllow Either the value "strip" or "allow".
* @param inCharList This is either (a) the list of characters that
* will be stripped from inStr (when inStripOrAllow ==
* "strip"), or (b) the list of characters that will
* NOT be stripped from inStr (when inStripOrAllow ==
"allow".
* @return The value of inStr after characters have been
* stripped as specified.
*/
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().
/**
* This function can check is a given string either only contains characters
* from a list, or does not contain any characters from a given list.
*（此函数用来判断 inString 是否为 inCharList 中的字符，或者进行相反的判断，取决于参数 inFromExcept）
* @param inString The string to validate.
* @param inCharList A list of characters that is either (a) the only
