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printf()/format() for JavaScript String
/*
* Extend JavaScript String object with printf() like functionality
* "{0} is dead, but {1} is alive!".format("This", "that");
*/
String.prototype.format = function() {
var formatted = this;
for(arg in arguments) {
formatted = formatted.replace("{" + arg + "}", arguments[arg]);
}
return formatted;
};
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