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Is there a standard function to check for null, undefined, or blank variables in JavaScript?
...vaScript function that checks that a variable has a value and ensures that it's not undefined or null ? I've got this code, but I'm not sure if it covers all cases:
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Cannot import the keyfile 'blah.pfx' - error 'The keyfile may be password protected'
...However, the "Developer Command Prompt" installed by Visual Studio adds additional information that usually includes the correct location.
Based on your post that would look like
sn -i companyname.pfx VS_KEY_3E185446540E7F7A
This must be run from the location of your PFX file, if you have the sol...
Regex Pattern to Match, Excluding when… / Except between
--Edit-- The current answers have some useful ideas but I want something more complete that I can 100% understand and reuse; that's why I set a bounty. Also ideas that work everywhere are better for me than not standard syntax like \K
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How should I unit test threaded code?
...e thus far avoided the nightmare that is testing multi-threaded code since it just seems like too much of a minefield. I'd like to ask how people have gone about testing code that relies on threads for successful execution, or just how people have gone about testing those kinds of issues that only ...
Is it necessary to explicitly remove event handlers in C#
...class is declared globally but not instanced upon that global declaration--it's instanced on an as-needed basis in the methods that need it.
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What to learn for making Java web applications in Java EE 6? [closed]
...en if I know that this will be controversial, my advice would be to start with Java EE 6 only. So, grab GlassFish v3 and either get the book Beginning Java EE 6 Platform with GlassFish 3: From Novice to Professional or follow the Java EE 6 tutorial. In my opinion, the book (that I've started to read...
Functional programming - is immutability expensive? [closed]
...n-place” quicksort isn’t really in-place (and quicksort is not by definition in-place). It requires additional storage in the form of stack space for the recursive step, which is in the order of O(log n) in the best case, but O(n) in the worst case.
Implementing a functional variant of quicksort...
How to prevent logback from outputting its own status at the start of every log when using a layout
...ms like a carelessness error, but I can't seem to find the cause. Logging with logback/slf4j (most recent version slf4j-api-1.6.1, logback core/classic 0.9.24). Simplest log configuration for testing is:
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How to convert from System.Enum to base integer?
... to create a generic method for converting any System.Enum derived type to its corresponding integer value, without casting and preferably without parsing a string.
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Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
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When it comes to database queries, always try and use prepared parameterised queries. The mysqli and PDO libraries support this. This is infinitely safer than using escaping functions such as mysql_real_escape_string.
Yes, mysql_...