String.template()
This is just a little helper method I use in JavaScript a fair bit, it's an extension of the String class that provides basic parameter replacement, you could equally call it String.format() or even String.$() without angering the gods ... either way, it's a convenient and minimal way to doing interpolated strings in JS.
String.prototype.template = function (o) {
return this.replace(/{([^{}]*)}/g,
function (a, b) {
var r = o[b];
return typeof r === 'string' ||
typeof r === 'number' ?
r : a;
}
);
};Usage is simple and reasonably flexible, although there's no printf or C#'s String.format style formatting.
"{0} an array is {1}".template(["Using","simple"]);Or for a bit of semantic richness a use a POO (plain old object)
"Your {list} list has {count} entries.".
template(
{
list: "Contacts",
count: 120
}); Written by Jason Milkins
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1 Response
Nice snippet. Here's a shorter version:
String.prototype.template = function() {
var args = arguments;
return this.replace(/\{([^}]+?)\}/g, function(_, match) {
return args[match];
});
};
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