javascript - What the different between `new Array(n)` and `Array(n)` -

what different if both of them call constructor "array" , generate object?

i know lost this if create object without new:

function animal(name) {this.name = name} var duck = animal('duck'); // undefined 

but how works new array(n) , array(n)?

there no difference. check article:

you never need use new object() in javascript. use object literal {} instead. similarly, don’t use new array(), use array literal [] instead. arrays in javascript work nothing arrays in java, , use of java-like syntax confuse you.

do not use new number, new string, or new boolean. these forms produce unnecessary object wrappers. use simple literals instead.

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so rule simple: time should use new operator invoke pseudoclassical constructor function. when calling constructor function, use of new mandatory.