Exists (-like) function for jQuery?
4521
Is there an "exists" function for jQuery?
150261
Alternative to File.exists() in Java
104905
Check if XML Element exists
86666
Edit file based on existence of a string
25077
Check if table exists in SQL Server
4033
Is there a case insensitive jQuery :contains selector?
50331
jQuery how to find an element based on a data-attribute value?
120837
Difference between EXISTS and IN in SQL?
44858
JavaScript isset() equivalent
121066
How to check if list item already exist when adding it with
74987
$('#id tag') vs. $('#id').find('tag') - which is preferable?
11663
Checking a list if a certain string exist in visualforce page
156630
How to check if page exists using JavaScript
119001
Check if multiple strings exist in another string
37438
How do I use the CoffeeScript existential operator to check some object properties for undefined?
71238
Check if a property exists in a class
40229
How do I check if a variable exists?