bindjs

JavaScript implementation of C++ std::bind

Usage

bind(fn, ctx, arg1, arg2, ...)

First two arguments are function to be wraped and it's execution context (thisArg). Next arguments represents fn execution arguments. There is bind.$ function for obtaining args placeholders:

• bind.$() - will be replaced by all wraper's arguments;
• bind.$(n) - will be replaced by nth wraper's argument (bind.$n is the same as arguments[n] in the wraper, i.e. bind.$(0) will be replaced by value from arguments[0]).

bind returns wrapped fn.

Examples

var dummyFn = function () { return arguments; };

bind(dummyFn, this, bind.$())(1, 2); // -> [1, 2]

bind(dummyFn, this, bind.$(1), bind.$(0))(1, 2); // -> [2, 1]

bind(dummyFn, this, bind.$(0), 'foo', bind.$(1), 'bar')(1, 2); // -> [1, "foo", 2, "bar"]

Performance

This bind is slower than native one or, obviously, direct function call. After some optimizations it has become 3x-4x slower, than direct function calls. All speed optimization suggests are welcome :)

See Also

• MSDN article about std::bind