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var baseCallback = require('./baseCallback'),
charAtCallback = require('./charAtCallback'),
extremumBy = require('./extremumBy'),
isArray = require('../lang/isArray'),
isIterateeCall = require('./isIterateeCall'),
isString = require('../lang/isString'),
toIterable = require('./toIterable');
/**
* Creates a `_.max` or `_.min` function.
*
* @private
* @param {Function} arrayFunc The function to get the extremum value from an array.
* @param {boolean} [isMin] Specify returning the minimum, instead of the maximum,
* extremum value.
* @returns {Function} Returns the new extremum function.
*/
function createExtremum(arrayFunc, isMin) {
return function(collection, iteratee, thisArg) {
if (thisArg && isIterateeCall(collection, iteratee, thisArg)) {
iteratee = null;
}
var noIteratee = iteratee == null;
iteratee = noIteratee ? iteratee : baseCallback(iteratee, thisArg, 3);
if (noIteratee) {
var isArr = isArray(collection);
if (!isArr && isString(collection)) {
iteratee = charAtCallback;
} else {
return arrayFunc(isArr ? collection : toIterable(collection));
}
}
return extremumBy(collection, iteratee, isMin);
};
}
module.exports = createExtremum;
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