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node_modules/lodash/cond.js

@@ -0,0 +1,60 @@
+var apply = require('./_apply'),
+    arrayMap = require('./_arrayMap'),
+    baseIteratee = require('./_baseIteratee'),
+    baseRest = require('./_baseRest');
+
+/** Error message constants. */
+var FUNC_ERROR_TEXT = 'Expected a function';
+
+/**
+ * Creates a function that iterates over `pairs` and invokes the corresponding
+ * function of the first predicate to return truthy. The predicate-function
+ * pairs are invoked with the `this` binding and arguments of the created
+ * function.
+ *
+ * @static
+ * @memberOf _
+ * @since 4.0.0
+ * @category Util
+ * @param {Array} pairs The predicate-function pairs.
+ * @returns {Function} Returns the new composite function.
+ * @example
+ *
+ * var func = _.cond([
+ *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
+ *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
+ *   [_.stubTrue,                      _.constant('no match')]
+ * ]);
+ *
+ * func({ 'a': 1, 'b': 2 });
+ * // => 'matches A'
+ *
+ * func({ 'a': 0, 'b': 1 });
+ * // => 'matches B'
+ *
+ * func({ 'a': '1', 'b': '2' });
+ * // => 'no match'
+ */
+function cond(pairs) {
+  var length = pairs == null ? 0 : pairs.length,
+      toIteratee = baseIteratee;
+
+  pairs = !length ? [] : arrayMap(pairs, function(pair) {
+    if (typeof pair[1] != 'function') {
+      throw new TypeError(FUNC_ERROR_TEXT);
+    }
+    return [toIteratee(pair[0]), pair[1]];
+  });
+
+  return baseRest(function(args) {
+    var index = -1;
+    while (++index < length) {
+      var pair = pairs[index];
+      if (apply(pair[0], this, args)) {
+        return apply(pair[1], this, args);
+      }
+    }
+  });
+}
+
+module.exports = cond;