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How to check whether a string is Base64 encoded or not
... it in my database. If the input is not Base64 encoded, I need to throw an error.
20 Answers
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Why rename synthesized properties in iOS with leading underscores? [duplicate]
...n this point:) Zeroing out the pointer as the accessor does may hide logic errors in your program. If you are ever accessing an instance variable of an object after the object has been deallocated, you are doing something seriously wrong. Because of Objective-C's nil-messaging semantics, however, yo...
How to tell if a JavaScript function is defined
...ed which is correct but your function should return false and not generate error...
– Wookie88
Oct 22 '12 at 22:53
@Wo...
“unary operator expected” error in Bash if condition
...d" ];
which is not a valid syntax. (It would also fail with a different error message if $aug1 included white space or shell metacharacters.)
The modern [[ operator has lots of other nice features, including regular expression matching.
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How to check for an undefined or null variable in JavaScript?
...e between cases:
Variables can be undefined or undeclared. You'll get an error if you access an undeclared variable in any context other than typeof.
if(typeof someUndeclaredVar == whatever) // works
if(someUndeclaredVar) // throws error
A variable that has been declared but not initialized is...
Modify request parameter with servlet filter
...p(), or even getAttribute() to get the request data, so, through trial and error, I determined that the servlet was calling HTTPServletRequest.getInputStream() and getQueryString(). My advice to anyone attempting this task for closed servlets is to wrap every single accessor in HTTPServletRequest in...
What breaking changes are introduced in C++11?
...ain() { auto int i = 0; return i; } is perfectly valid C++03, but a syntax error in C++11. The only warning I can get compilers to give for it in C++03 mode is a warning about compatibility.
– user743382
Sep 14 '14 at 10:37
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How to add leading zeros?
.... This function doesn't seems to work for this case. It gives me an arror: Error in sprintf("%020d", 4000100000104) : invalid format '%020d'; use format %f, %e, %g or %a for numeric objects. Any suggestion?
– Rotail
Aug 4 '16 at 17:11
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Difference between a theta join, equijoin and natural join
... whereas it makes nonsense and more is against business logic and leads to error. So yes, "natural join" is dangerous. It forces you to have distinct names except for (primary/foreign) key colulmns and lose "name spacing".
– LoganMzz
Nov 8 '16 at 13:31
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How to permanently disable region-folding in Visual Studio 2008
Anyone know how to turn off code folding in visual studio 2008? Some of my colleagues love it, but I personally always want to see all the code, and never want code folded out of sight. I'd like a setting that means my copy of Visual Studio never folds #regions or function bodies.
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