Check if an element is present in an array
187
How do I check if an array includes a value in JavaScript?
157279
How do you check if a variable is an array in JavaScript?
6988
How to check whether an array is empty using PHP?
85352
Couting occurrences of each value in an array
96244
How to remove element from an array
95734
Check if something is (not) in a list in Python
29168
Counting the occurrences / frequency of array elements
83478
Check if a "run-time" multidimensional array key exists
21683
What is the most elegant way to check if all values in a boolean array are true?
17040
Check if an array is empty or exists
146880
Detect if an element is visible with jQuery
29245
How to check if two arrays are equal with JavaScript?
113201
How do I check if my array has repeated values inside it?
67428
How do I determine whether an array contains a particular value in Java?
68047
How to check if one of the following items is in a list?
124280
Test if array is inside a list in lisp
12418
Checking to see if one array's elements are in another array in PHP