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add grab method to get elements in a collection that match the indexes in the provided list array

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Former-commit-id: 18df81c229cab4acde8f8157df9bb1001a51e9db
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Dan Heberden
2012-12-18 10:00:24 -08:00
parent bba18cd56b
commit 2ae0e9d902
2 changed files with 42 additions and 0 deletions
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22
test/test.js
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@@ -667,6 +667,28 @@
/*--------------------------------------------------------------------------*/
QUnit.module('lodash.grab');
(function() {
test('should get items in range', function() {
var result = _.grab(['a', 'b', 1.4, 'c', { 'foo': 'bar' }, 'd'], [0, 2, 4]);
deepEqual( result, ['a', 1.4, { 'foo': 'bar' } ]);
});
test('should work with an object for `collection`', function() {
var result = _.grab({ 'a': 'apple', 'b': 'ball', 'c': 'count' }, ['a', 'c']);
deepEqual(result, ['apple', 'count']);
});
test('no list should return an empty array', function() {
deepEqual(_.grab(['a', 'b', 'c']), [] );
});
test('out of range selections should return undefined', function() {
var result = _.grab(['a', 'b', 'c'], [1, 9001]);
deepEqual( result, ['b', undefined]);
});
}());
/*--------------------------------------------------------------------------*/
QUnit.module('lodash.groupBy');
(function() {