custom-app
Version:
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21 lines (20 loc) • 520 B
JavaScript
// optional / simple context binding
var aFunction = require('./_a-function');
module.exports = function (fn, that, length) {
aFunction(fn);
if (that === undefined) return fn;
switch (length) {
case 1: return function (a) {
return fn.call(that, a);
};
case 2: return function (a, b) {
return fn.call(that, a, b);
};
case 3: return function (a, b, c) {
return fn.call(that, a, b, c);
};
}
return function (/* ...args */) {
return fn.apply(that, arguments);
};
};