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node_modules/lodash/sum.js

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+var baseSum = require('./_baseSum'),
+    identity = require('./identity');
+
+/**
+ * Computes the sum of the values in `array`.
+ *
+ * @static
+ * @memberOf _
+ * @since 3.4.0
+ * @category Math
+ * @param {Array} array The array to iterate over.
+ * @returns {number} Returns the sum.
+ * @example
+ *
+ * _.sum([4, 2, 8, 6]);
+ * // => 20
+ */
+function sum(array) {
+  return (array && array.length)
+    ? baseSum(array, identity)
+    : 0;
+}
+
+module.exports = sum;