JavaScript object has key with specific regex pattern

Question

How to find whether a JavaScript object has key with specific regex pattern ? For example, in the below object, how to find whether it contains a key containing the word "Address"?

var obj = {Address_Line1 : "XXX", Address_Line2 :"YYY", Name : "ZZZ"};

What is your issue? Do you need to know how to get the keys of an object? Do you need to know how to loop across them? Do you need to know how to find if one string is contained in another? — user663031
– user663031, Commented Jan 8, 2016 at 6:01
Not sure if the answer I provided is what he wants, but it's what he is currently asking for. @Tushar's solution is better for the exact spec, but if OP ever needs to check each key with a regex, my solution might cover that more easily. — Scott
– Scott, Commented Jan 8, 2016 at 6:08

Scott · Accepted Answer · 2016-01-08 06:00:32Z

9

Sure - you can do this with Array.prototype.some and Object.keys, like so:

var obj = {Address_Line1 : "XXX", Address_Line2 :"YYY", Name : "ZZZ"};

var hasKeyRegex = Object.keys(obj).some(function(key) {
  return /Address/.test(key);
});

console.log(hasKeyRegex);

hasKeyRegex will be true if the object has a key containing Address, and false if not.

edited Jan 8, 2016 at 6:00

answered Jan 8, 2016 at 5:57

Scott

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1 Comment

user663031 Over a year ago

Why the ^ at the beginning, since the spec was "containing"?

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