Most efficient way to determine if values are strings
6282
How do I check if a string is a number (float)?
140110
In Java, how do I dynamically determine the type of an array?
18830
Determine if a String is an Integer in Java
143939
How do you use: isalnum, isdigit, isupper to test each character of a string?
55524
How to find out if the value contained in a string is double or not
21337
Determining whether a string has a substring (word)
85180
Most efficient way to see if an ArrayList contains an object in Java
73423
What is the best (idiomatic) way to check the type of a Python variable?
126006
How to find out if an Object is a collection or single value?
148755
How to check if string contents have any HTML in it?
89683
valueOf() vs. toString() in Javascript
31433
How do I properly compare strings in C?
14293
Best way to find if an item is in a JavaScript array?
12419
How to check if a String contains another String in a case insensitive manner in Java?
30955
Check if a string contains an element from a list (of strings)
125664
Selectively converting numerical strings to expressions
116138
Identify if a string is a number