Nodejs String Sub String substrReplace(replaceWith, start, length)

Method Source Code

/**/*w  ww  .ja  v a2 s. c o m*/
@Name: String.prototype.substrReplace
@Author: Paul Visco
@Version: 1.0 11/19/07
@Description: Mimics php substrReplace replacing part of the string with another string from an index to a length
@Param: String replaceWith The string to replace with
@Param: Integer start The index to start at
@Param: Integer start The length to replace
@Return: String The string with the replacement
@Example:
var myString = 'hello world';
var answer = myString.substrReplace('girl', 0, 4);
answer = 'girlo world';
*/
String.prototype.substrReplace = function(replaceWith, start, length){
   return this.replace(this.substring(start, (start+length)), replaceWith );
};

Related

1. subst(replacements)

   String.prototype.subst = function (replacements) {
       "use strict";
       return this.replace(/%[A-Z][A-Z0-9_]+%/g, function (placeholder) {
           return placeholder in replacements ? replacements[placeholder] : placeholder;
       });
   };
   

2. substitute(object, regexp)

   String.prototype.substitute = function(object, regexp){
     return String(this).replace(regexp || (/\\?\{([^{}]+)\}/g), function(match, name){
       if (match.charAt(0) == '\\') return match.slice(1);
       return (object[name] !== null) ? object[name] : '';
     });
   };
   

3. substr(begin, end)

   String.prototype.substr = function(begin, end) {
     if (end === null) { end = this.length;           }
     if (begin <  0)   { begin = this.length + begin; }
     if (end <= 0)     { end = this.length + end;     }
     if (begin < 1)    { begin = end - 1/begin;       }
     if (end < 1)      { end = begin + 1/end;         }
     return this.substring(begin, end);
   

4. substr(start, length)

   String.prototype.substr = function(start, length) {
     if (start < 0) {
       start = start + this.length;
     if (!length) {
       length = this.length - start;
     var s = "";
     for (var i = start, len = this.length; i < start + length && i < len; i+) {
   ...
   

5. substrCount(needle)

   String.prototype.substrCount = function(needle){
     var cnt = 0;
     for (var i=0;i<this.length;i++) {
     if (needle == this.substr(i,needle.length))
       cnt++;
     return cnt;
   };
   

6. substrWoR(c)

   String.prototype.substrWoR = function(c){
     var n=1,o=0;
     while(o!=n){
       s=this.substr(0,c+(o=n)-1);
       n=s.split("\r").length;
     return s;
   

7. substrb(len)

   String.prototype.substrb = function(len){
     var str1;
     if(this.lengthb() <= len)
       return this;
     for(var i = len/2; i < this.length; i++)
       str1 = this.substr(0,i);
   ...
   

8. substring(start, end)

   String.prototype.substring = function(start, end) {
     if (start < 0) {
       start = start + this.length;
     if (!end) {
       end = this.length;
     } else if (end < 0) {
       end = end + this.length;
     var s = "";
     for (var i = start, len = this.length; i < end && i < len; i++) {
       s += this[i];
     return s;
   };
   

9. substrings()

   String.prototype.substrings = function () {
     subs = [];
     for(var i = 0; i < this.length; i++) {
       for( var j = i+1; j < this.length+1; j++) {
         subs.push(this.slice(i,j));
       };
     };
     return subs;
   };
   ...