数组常用方法总结

判断数组中是否存在某个值

var arrData = ['html', 'css', 'javascript'];
var value = 'css';

console.log(arrData.includes(value));
console.log(arrData.some(item => item === value));
console.log(arrData.indexOf(value) < 0 ? false : true);
console.log(arrData.findIndex(item => item === value) < 0 ? false : true);
console.log(arrData.find(item => item === value) !== undefined ? true : false );

var arrData = [ {name: 'html', checked: true }, {name: 'css', checked: true }, {name: 'javascript', checked: true } ]
var value = 'css'

console.log(arrData.some(item => item.name === value));
console.log(arrData.filter(item=> item.name === value)[0] ? true : false);
console.log(arrData.find(item => item.name === value) ? true : false);