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68 lines
2.4 KiB
JavaScript
68 lines
2.4 KiB
JavaScript
/**
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* lodash 3.0.0 (Custom Build) <https://lodash.com/>
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* Build: `lodash modern modularize exports="npm" -o ./`
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* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
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* Based on Underscore.js 1.7.0 <http://underscorejs.org/LICENSE>
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* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
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* Available under MIT license <https://lodash.com/license>
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*/
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var baseCallback = require('lodash._basecallback'),
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binaryIndex = require('lodash._binaryindex'),
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binaryIndexBy = require('lodash._binaryindexby');
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/**
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* Uses a binary search to determine the lowest index at which `value` should
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* be inserted into `array` in order to maintain its sort order. If an iteratee
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* function is provided it is invoked for `value` and each element of `array`
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* to compute their sort ranking. The iteratee is bound to `thisArg` and
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* invoked with one argument; (value).
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*
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* If a property name is provided for `predicate` the created `_.property`
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* style callback returns the property value of the given element.
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*
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* If a value is also provided for `thisArg` the created `_.matchesProperty`
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* style callback returns `true` for elements that have a matching property
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* value, else `false`.
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*
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* If an object is provided for `predicate` the created `_.matches` style
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* callback returns `true` for elements that have the properties of the given
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* object, else `false`.
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*
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* @static
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* @memberOf _
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* @category Array
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* @param {Array} array The sorted array to inspect.
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* @param {*} value The value to evaluate.
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* @param {Function|Object|string} [iteratee=_.identity] The function invoked
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* per iteration.
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* @param {*} [thisArg] The `this` binding of `iteratee`.
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* @returns {number} Returns the index at which `value` should be inserted
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* into `array`.
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* @example
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*
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* _.sortedIndex([30, 50], 40);
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* // => 1
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*
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* _.sortedIndex([4, 4, 5, 5], 5);
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* // => 2
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*
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* var dict = { 'data': { 'thirty': 30, 'forty': 40, 'fifty': 50 } };
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*
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* // using an iteratee function
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* _.sortedIndex(['thirty', 'fifty'], 'forty', function(word) {
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* return this.data[word];
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* }, dict);
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* // => 1
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*
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* // using the `_.property` callback shorthand
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* _.sortedIndex([{ 'x': 30 }, { 'x': 50 }], { 'x': 40 }, 'x');
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* // => 1
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*/
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function sortedIndex(array, value, iteratee, thisArg) {
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return iteratee == null
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? binaryIndex(array, value)
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: binaryIndexBy(array, value, baseCallback(iteratee, thisArg, 1));
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}
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module.exports = sortedIndex;
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