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author | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
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committer | Florian Dold <florian.dold@gmail.com> | 2016-11-03 01:33:53 +0100 |
commit | d1291f67551c58168af43698a359cb5ddfd266b0 (patch) | |
tree | 55a13ed29fe1915e3f42f1b1b7038dafa2e975a7 /node_modules/lodash/sumBy.js | |
parent | d0a0695fb5d34996850723f7d4b1b59c3df909c2 (diff) | |
download | wallet-core-d1291f67551c58168af43698a359cb5ddfd266b0.tar.xz |
node_modules
Diffstat (limited to 'node_modules/lodash/sumBy.js')
-rw-r--r-- | node_modules/lodash/sumBy.js | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/node_modules/lodash/sumBy.js b/node_modules/lodash/sumBy.js new file mode 100644 index 000000000..00e36d00e --- /dev/null +++ b/node_modules/lodash/sumBy.js @@ -0,0 +1,33 @@ +var baseIteratee = require('./_baseIteratee'), + baseSum = require('./_baseSum'); + +/** + * This method is like `_.sum` except that it accepts `iteratee` which is + * invoked for each element in `array` to generate the value to be summed. + * The iteratee is invoked with one argument: (value). + * + * @static + * @memberOf _ + * @since 4.0.0 + * @category Math + * @param {Array} array The array to iterate over. + * @param {Function} [iteratee=_.identity] The iteratee invoked per element. + * @returns {number} Returns the sum. + * @example + * + * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }]; + * + * _.sumBy(objects, function(o) { return o.n; }); + * // => 20 + * + * // The `_.property` iteratee shorthand. + * _.sumBy(objects, 'n'); + * // => 20 + */ +function sumBy(array, iteratee) { + return (array && array.length) + ? baseSum(array, baseIteratee(iteratee, 2)) + : 0; +} + +module.exports = sumBy; |