Why arr[0] instanceof Number returns false even the array has numbers
29701
Why does instanceof return false for some literals?
22602
Why is == true for some Integer objects?
154947
Find index of a value in an array
12279
Accessing an array out of bounds gives no error, why?
67428
How do I determine whether an array contains a particular value in Java?
187
How do I check if an array includes a value in JavaScript?
25893
Ruby Array Initialization
72583
Why can array constants only be used in initializers?
34563
Why does PHP consider 0 to be equal to a string?
126196
How to check if an object is an array?
29245
How to check if two arrays are equal with JavaScript?
10287
Why does parseInt yield NaN with Array#map?
6282
How do I check if a string is a number (float)?
146079
All my properties are zero, and my array is zero, even though I have populated them with numbers and objects
113622
Why does a large local array crash my program, but a global one doesn't?
79356
How to get the array index or iteration number with an each iterator?
18071
Why is the array empty after the while loop?