30 lines
1.0 KiB
JavaScript
30 lines
1.0 KiB
JavaScript
var baseEach = require('./baseEach');
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/**
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* Gets the extremum value of `collection` invoking `iteratee` for each value
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* in `collection` to generate the criterion by which the value is ranked.
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* The `iteratee` is invoked with three arguments: (value, index|key, collection).
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*
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* @private
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* @param {Array|Object|string} collection The collection to iterate over.
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* @param {Function} iteratee The function invoked per iteration.
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* @param {Function} comparator The function used to compare values.
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* @param {*} exValue The initial extremum value.
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* @returns {*} Returns the extremum value.
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*/
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function baseExtremum(collection, iteratee, comparator, exValue) {
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var computed = exValue,
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result = computed;
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baseEach(collection, function(value, index, collection) {
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var current = +iteratee(value, index, collection);
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if (comparator(current, computed) || (current === exValue && current === result)) {
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computed = current;
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result = value;
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}
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});
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return result;
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}
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module.exports = baseExtremum;
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