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'use strict';
const { isFunction } = require('../helpers/is');
module.exports = function first(fn, defaultValue) {
if (isFunction(fn)) {
for (let i = 0, { length } = this.items; i < length; i += 1) {
const item = this.items[i];
if (fn(item)) {
return item;
}
}
if (isFunction(defaultValue)) {
return defaultValue();
}
return defaultValue;
}
if ((Array.isArray(this.items) && this.items.length) || (Object.keys(this.items).length)) {
if (Array.isArray(this.items)) {
return this.items[0];
}
const firstKey = Object.keys(this.items)[0];
return this.items[firstKey];
}
if (isFunction(defaultValue)) {
return defaultValue();
}
return defaultValue;
};