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node_modules/ramda/src/cond.js

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+var _arity =
+/*#__PURE__*/
+require("./internal/_arity");
+
+var _curry1 =
+/*#__PURE__*/
+require("./internal/_curry1");
+
+var map =
+/*#__PURE__*/
+require("./map");
+
+var max =
+/*#__PURE__*/
+require("./max");
+
+var reduce =
+/*#__PURE__*/
+require("./reduce");
+/**
+ * Returns a function, `fn`, which encapsulates `if/else, if/else, ...` logic.
+ * `R.cond` takes a list of [predicate, transformer] pairs. All of the arguments
+ * to `fn` are applied to each of the predicates in turn until one returns a
+ * "truthy" value, at which point `fn` returns the result of applying its
+ * arguments to the corresponding transformer. If none of the predicates
+ * matches, `fn` returns undefined.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.6.0
+ * @category Logic
+ * @sig [[(*... -> Boolean),(*... -> *)]] -> (*... -> *)
+ * @param {Array} pairs A list of [predicate, transformer]
+ * @return {Function}
+ * @see R.ifElse, R.unless, R.when
+ * @example
+ *
+ *      const fn = R.cond([
+ *        [R.equals(0),   R.always('water freezes at 0°C')],
+ *        [R.equals(100), R.always('water boils at 100°C')],
+ *        [R.T,           temp => 'nothing special happens at ' + temp + '°C']
+ *      ]);
+ *      fn(0); //=> 'water freezes at 0°C'
+ *      fn(50); //=> 'nothing special happens at 50°C'
+ *      fn(100); //=> 'water boils at 100°C'
+ */
+
+
+var cond =
+/*#__PURE__*/
+_curry1(function cond(pairs) {
+  var arity = reduce(max, 0, map(function (pair) {
+    return pair[0].length;
+  }, pairs));
+  return _arity(arity, function () {
+    var idx = 0;
+
+    while (idx < pairs.length) {
+      if (pairs[idx][0].apply(this, arguments)) {
+        return pairs[idx][1].apply(this, arguments);
+      }
+
+      idx += 1;
+    }
+  });
+});
+
+module.exports = cond;