Is there a way to check if an object contains certain data?
30894
What is the best way to filter a Java Collection?
5307
Check if a variable is in an ad-hoc list of values
137138
How to check if an array element exists?
46987
Does Python have a string 'contains' substring method?
113905
How can I check whether a variable is defined in JavaScript?
29684
How to check if an object is nullable?
6533
How do I check if a string contains another string in Objective-C?
6320
How to determine if a string contains any matches of a list of strings
68047
How to check if one of the following items is in a list?
30610
fastest way to detect if a value is in a group of values in Javascript
40229
How do I check if a variable exists?
35902
Comparing Arrays of Objects in JavaScript
3526
How to determine equality for two JavaScript objects?
133200
Test if a vector contains a given element
22337
How to test if a list contains another list?
5254
How to determine an object's class?
26495
Check if active object has a modifier