Nodejs String Format format(i, safe, arg)

Method Source Code

// Inspired by http://bit.ly/juSAWl
// Augment String.prototype to allow for easier formatting.  This implementation 
// doesn't completely destroy any existing String.prototype.format functions,
// and will stringify objects/arrays.
String.prototype.format = function(i, safe, arg) {

  function format() {
    var str = this, len = arguments.length+1;

    // For each {0} {1} {n...} replace with the argument in that position.  If 
    // the argument is an object or an array it will be stringified to JSON.
    for (i=0; i < len; arg = arguments[i++]) {
      safe = typeof arg === 'object' ? JSON.stringify(arg) : arg;
      str = str.replace(RegExp('\\{'+(i-1)+'\\}', 'g'), safe);
    }//from   w ww . j a v a2 s  . c o  m
    return str;
  }

  // Save a reference of what may already exist under the property native.  
  // Allows for doing something like: if("".format.native) { /* use native */ }
  format.native = String.prototype.format;

  // Replace the prototype property
  return format;

}();

Related

1. format(data)

   String.prototype.format = function(data) {
       return this.replace(/{(.+?)}/g, function(match, name) {
           return data[name] || match;
       });
   };
   

2. format(dict)

   String.prototype.format = function(dict) {
     var result = this;
     if(typeof(dict) === "object") {
       Object.keys(dict).forEach(function(key) {
         result = result.replace("{" + key + "}", dict[key]);
       });
       return result;
     var args = [];
   ...
   

3. format(fmt)

   String.prototype.format = function (fmt) {
       if (fmt==null) fmt = "yyyy-MM-dd";
       var myDate = new Date(this);
       var o = {
           "M+": myDate.getMonth() + 1,
           "d+": myDate.getDate(),
           "h+": myDate.getHours(),
           "m+": myDate.getMinutes(),
           "s+": myDate.getSeconds(),
   ...
   

4. format(format)

   String.prototype.format = function (format) {
       const holders = JSON.parse(format),
           regex = new RegExp('(#{(\\w+)})', 'g');
       let transformed = this,
           currentMatch = '';
       while ((currentMatch = regex.exec(this)) !== null) {
           transformed = transformed.replace(currentMatch[1], holders[currentMatch[2]]);
       return transformed;
   ...
   

5. format(format)

   String.format = function (format) {
       var args = Array.prototype.slice.call(arguments, 1);
       return format.replace(/{(\d+)}/g, function (match, number) {
           return typeof args[number] != 'undefined'
           ? args[number]
           : match;
       });
   };
   String.prototype.format = function () {
   ...
   

6. format(i, safe, arg)

   String.prototype.format = function(i, safe, arg) {
     function format() {
       var str = this, len = arguments.length+1;
       for (i=0; i < len; arg = arguments[i++]) {
         safe = typeof arg === 'object' ? JSON.stringify(arg) : arg;
         str = str.replace(RegExp('\\{'+(i-1)+'\\}', 'g'), safe);
       return str;
     format.native = String.prototype.format;
     return format;
   }();
   

7. format(o)

   String.prototype.format = function (o) {
       return this.replace(/{([^{}]*)}/g,
           function (a, b) {
               var r = o[b];
               return typeof r === 'string' || typeof r === 'number' ? r : a;
       );
   };
   

8. format(o)

   String.prototype.format = function(o){
       var self = this;
       for(var i in o)self = self.replace(new RegExp("\\$\\{" + i + "\\}", "g"), o[i]);
       return self;
   };
   

9. format(obj)

   String.prototype.format = function(obj) {
     var args = arguments;
     var str = this;
     return str.replace(/\{[\w\d_-]+\}/g, function(part) {
       part = part.slice(1, -1);
       var index = parseInt(part, 10);
       if (isNaN(index)) {
         return obj[part];
       } else {
   ...