@antv/util
Version:
> AntV 底层依赖的工具库，不建议在自己业务中使用。
36 lines • 1.02 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var is_array_1 = tslib_1.__importDefault(require("./is-array"));
var is_function_1 = tslib_1.__importDefault(require("./is-function"));
/**
* @param {Array} arr The array to iterate over.
* @param {Function} [fn] The iteratee invoked per element.
* @return {*} Returns the maximum value.
* @example
*
* var objects = [{ 'n': 1 }, { 'n': 2 }];
*
* maxBy(objects, function(o) { return o.n; });
* // => { 'n': 2 }
*
* maxBy(objects, 'n');
* // => { 'n': 2 }
*/
exports.default = (function (arr, fn) {
if (!(0, is_array_1.default)(arr)) {
return undefined;
}
var maxItem;
var max = -Infinity;
for (var i = 0; i < arr.length; i++) {
var item = arr[i];
var v = (0, is_function_1.default)(fn) ? fn(item) : item[fn];
if (v > max) {
maxItem = item;
max = v;
}
}
return maxItem;
});
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