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- {"ast":null,"code":"import apply from './_apply.js';\nimport arrayMap from './_arrayMap.js';\nimport baseIteratee from './_baseIteratee.js';\nimport baseRest from './_baseRest.js';\n\n/** Error message constants. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/**\n * Creates a function that iterates over `pairs` and invokes the corresponding\n * function of the first predicate to return truthy. The predicate-function\n * pairs are invoked with the `this` binding and arguments of the created\n * function.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Util\n * @param {Array} pairs The predicate-function pairs.\n * @returns {Function} Returns the new composite function.\n * @example\n *\n * var func = _.cond([\n * [_.matches({ 'a': 1 }), _.constant('matches A')],\n * [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],\n * [_.stubTrue, _.constant('no match')]\n * ]);\n *\n * func({ 'a': 1, 'b': 2 });\n * // => 'matches A'\n *\n * func({ 'a': 0, 'b': 1 });\n * // => 'matches B'\n *\n * func({ 'a': '1', 'b': '2' });\n * // => 'no match'\n */\nfunction cond(pairs) {\n var length = pairs == null ? 0 : pairs.length,\n toIteratee = baseIteratee;\n pairs = !length ? [] : arrayMap(pairs, function (pair) {\n if (typeof pair[1] != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n return [toIteratee(pair[0]), pair[1]];\n });\n return baseRest(function (args) {\n var index = -1;\n while (++index < length) {\n var pair = pairs[index];\n if (apply(pair[0], this, args)) {\n return apply(pair[1], this, args);\n }\n }\n });\n}\nexport default cond;","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}
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