Skip to content

Instantly share code, notes, and snippets.

@caspahouzer
Created March 12, 2015 12:03
Show Gist options
  • Save caspahouzer/a447fe14ddd715443522 to your computer and use it in GitHub Desktop.
Save caspahouzer/a447fe14ddd715443522 to your computer and use it in GitHub Desktop.
String.prototype.printf = function (obj) {
var useArguments = false;
var _arguments = arguments;
var i = -1;
if (typeof _arguments[0] == "string") {
useArguments = true;
}
if (obj instanceof Array || useArguments) {
return this.replace(/\%s/g, function (a, b) {
i++;
if (useArguments) {
if (typeof _arguments[i] == 'string') {
return _arguments[i];
} else {
throw new Error("Arguments element is an invalid type");
}
}
return obj[i];
});
} else {
return this.replace(/{([^{}]*)}/g, function (a, b) {
var r = obj[b];
return typeof r === 'string' || typeof r === 'number' ? r : a;
});
}
};
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment