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Enhancing _.bind() to support binding constructors ... which you would never, ever want to do.

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This commit is contained in:
Jeremy Ashkenas
2011-10-19 16:51:53 -04:00
parent 3fbb9bb0dd
commit 00cd88cfa6
2 changed files with 21 additions and 4 deletions
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7
test/functions.js
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@@ -29,6 +29,13 @@ $(document).ready(function() {
_.bind(func, 0, 0, 'can bind a function to `0`')();
_.bind(func, '', '', 'can bind a function to an empty string')();
_.bind(func, false, false, 'can bind a function to `false`')();
// These tests are only meaningful when using a browser without a native bind function
// To test this with a modern browser, set underscore's nativeBind to undefined
var F = function () { return this; };
var Boundf = _.bind(F, {hello: "moe curly"});
equal(new Boundf().hello, undefined, "function should not be bound to the context, to comply with ECMAScript 5");
equal(Boundf().hello, "moe curly", "When called without the new operator, it's OK to be bound to the context");
});
test("functions: bindAll", function() {