When to use nil, blank, empty?
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How to understand nil vs. empty vs. blank in Ruby
64769
What is the difference between \empty and \@empty?
703
What is the best way to test for an empty string with jquery-out-of-the-box?
28291
What is the difference between these (bCondition == NULL) and (NULL==bCondition)?
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Is "empty set" an element of a set?
127005
' ... != null' or 'null != ....' best performance?
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string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
39300
What does the (unary) * operator do in this Ruby code?
89933
How do I avoid trailing empty items being removed when splitting strings?
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iPhone : Difference between nil vs Nil and true vs TRUE
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Benefits of using the conditional ?: (ternary) operator
23586
What is the difference between String.Empty and "" (empty string)?
130312
Why aren't hash values for "nothing" (empty) defined as all zeros?
24249
When is the Killing form null?
9434
How do I check if a list is empty?
141537
Return a blank when cell reference is blank
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What is the difference between String? and String! (two ways of creating an optional variable)?