In javascript how can we identify whether an object is a Hash or an Array?
Modern browsers support the Array.isArray(obj)
method.
See MDN for documentation and a polyfill.
= original answer from 2008 =
you can use the constuctor property of your output:
if(output.constructor == Array){
}
else if(output.constructor == Object){
}
Is object:
function isObject ( obj ) {
return obj && (typeof obj === "object");
}
Is array:
function isArray ( obj ) {
return isObject(obj) && (obj instanceof Array);
}
Because arrays are objects you'll want to test if a variable is an array first, and then if it is an object:
if (isArray(myObject)) {
// do stuff for arrays
}
else if (isObject(myObject)) {
// do stuff for objects
}
Did you mean "Object" instead of "Hash"?
>>> var a = [];
>>> var o = {};
>>> a instanceof Array
true
>>> o instanceof Array
false