Check variable is object or function
function objectOrFunction(x) {
let type = typeof x;
return x !== null && (type === 'object' || type === 'function');
}
Check vairable is function
function isFunc() {
return typeof x === 'function';
}
Check variable is array
function isArray(value) {
let _isArray;
if (Array.isArray) {
_isArray = Array.isArray;
} else {
_isArray = x => Object.prototype.toString.call(x) === '[object Array]';
}
_isArray(value);
}
