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MySQL CONCAT returns NULL if any field contain NULL
...es: it returns the first non-NULL value parameter passed to it (or NULL if all parameters are NULL). By passing an empty string as the second parameter, you are guaranteeing it will not return NULL.
– Jo.
Mar 10 '17 at 17:03
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How can I get the length of text entered in a textbox using jQuery?
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Up Vote because you explained what it all does, not jsut provided the code.
– user83632
May 2 '09 at 16:53
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How to Remove ReadOnly Attribute on File Using PowerShell?
...e here? As for Keith's answer, he's using PSCX. Not everyone has those installed and that's not really a case of PowerShell v1 vs. v2.
– Joey
Apr 22 '11 at 9:28
add a comment
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How do I call ::std::make_shared on a class with only protected or private constructors?
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Actually, I am a huge fan of those meaningless structures used only as keys. I prefer this to Luc's solution, but that might be my biais against inheritance.
– Matthieu M.
Nov 16 '11 at 7:43...
How do I get the MAX row with a GROUP BY in LINQ query?
... (s => s.uid, tv => tv.uid, asdf => asdf.uid). Linq will automatically recognize it as selecting over elements of type Serial.
– Michael
Mar 17 '11 at 17:03
add a com...
What does “DAMP not DRY” mean when talking about unit tests?
...ues or setup code. However, unlike production code, this duplication is usually isolated only to the scenarios within a single test fixture/file. Because of this, the duplication is minimal and obvious, which means it poses less risk to the project than other types of duplication.
Furthermore, remo...
Optimizing away a “while(1);” in C++0x
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Does someone have a good explanation of why this was necessary to allow?
Yes, Hans Boehm provides a rationale for this in N1528: Why undefined behavior for infinite loops?, although this is WG14 document the rationale applies to C++ as well and the document refers to both WG14 and WG21:
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Why do people put code like “throw 1; ” and “for(;;);” in front of json responses? [du
...ruct, they'll be the attacker's own versions of those objects, with potentially-unexpected behaviour.
For example, you can hack a setter-property into Object, that would betray the values written in object literals:
Object.prototype.__defineSetter__('x', function(x) {
alert('Ha! I steal '+x);
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Enforcing the type of the indexed members of a Typescript object?
...ore a mapping of string -> string in a Typescript object, and enforce that all of the keys map to strings. For example:
8 ...
scopes with lambda and arguments in Rails 4 style?
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Supporting documentation, section 14.1 specifically.
– Dennis
Feb 4 '14 at 18:40
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