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Diffstat (limited to 'deps/npm/node_modules/cli-table2/node_modules/lodash/collection/countBy.js')
-rw-r--r-- | deps/npm/node_modules/cli-table2/node_modules/lodash/collection/countBy.js | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/deps/npm/node_modules/cli-table2/node_modules/lodash/collection/countBy.js b/deps/npm/node_modules/cli-table2/node_modules/lodash/collection/countBy.js new file mode 100644 index 0000000000..e97dbb749d --- /dev/null +++ b/deps/npm/node_modules/cli-table2/node_modules/lodash/collection/countBy.js @@ -0,0 +1,54 @@ +var createAggregator = require('../internal/createAggregator'); + +/** Used for native method references. */ +var objectProto = Object.prototype; + +/** Used to check objects for own properties. */ +var hasOwnProperty = objectProto.hasOwnProperty; + +/** + * Creates an object composed of keys generated from the results of running + * each element of `collection` through `iteratee`. The corresponding value + * of each key is the number of times the key was returned by `iteratee`. + * The `iteratee` is bound to `thisArg` and invoked with three arguments: + * (value, index|key, collection). + * + * If a property name is provided for `iteratee` the created `_.property` + * style callback returns the property value of the given element. + * + * If a value is also provided for `thisArg` the created `_.matchesProperty` + * style callback returns `true` for elements that have a matching property + * value, else `false`. + * + * If an object is provided for `iteratee` the created `_.matches` style + * callback returns `true` for elements that have the properties of the given + * object, else `false`. + * + * @static + * @memberOf _ + * @category Collection + * @param {Array|Object|string} collection The collection to iterate over. + * @param {Function|Object|string} [iteratee=_.identity] The function invoked + * per iteration. + * @param {*} [thisArg] The `this` binding of `iteratee`. + * @returns {Object} Returns the composed aggregate object. + * @example + * + * _.countBy([4.3, 6.1, 6.4], function(n) { + * return Math.floor(n); + * }); + * // => { '4': 1, '6': 2 } + * + * _.countBy([4.3, 6.1, 6.4], function(n) { + * return this.floor(n); + * }, Math); + * // => { '4': 1, '6': 2 } + * + * _.countBy(['one', 'two', 'three'], 'length'); + * // => { '3': 2, '5': 1 } + */ +var countBy = createAggregator(function(result, value, key) { + hasOwnProperty.call(result, key) ? ++result[key] : (result[key] = 1); +}); + +module.exports = countBy; |