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How do I test if a string is empty in Objective-C?
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You can check if [string length] == 0. This will check if it's a valid but empty string (@"") as well as if it's nil, since calling length on nil will also return 0.
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What's the point of 'const' in the Haskell Prelude?
Looking through the Haskell Prelude, I see a function const :
9 Answers
9
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How can I find the method that called the current method?
..., how can I learn the name of the method that called the current method? I know all about System.Reflection.MethodBase.GetCurrentMethod() , but I want to go one step beneath this in the stack trace. I've considered parsing the stack trace, but I am hoping to find a cleaner more explicit way, someth...
How can I indent multiple lines in Xcode?
... select multiple lines of code and want to indent them as usual with TAB key, it just deletes them all. I come from Eclipse where I always did it that way. How's that done in Xcode? I hope not line by line ;)
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Getting only Month and Year from SQL DATE
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Wayne Werner
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answered Nov 23 '09 at 14:24
MatBailieMatBa...
How to find a text inside SQL Server procedures / triggers?
I have a linkedserver that will change. Some procedures call the linked server like this: [10.10.100.50].dbo.SPROCEDURE_EXAMPLE . We have triggers also doing this kind of work. We need to find all places that uses [10.10.100.50] to change it.
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Behaviour of final static method
...orphism, the call ts() in A will never be redirected to the one in B.
The keyword final will disable the method from being hidden. So they cannot be hidden and an attempt to do so will result in a compiler error.
Hope this helps.
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Get list of databases from SQL Server
...he list of available databases on a SQL Server instance? I'm planning to make a list of them in a combo box in VB.NET.
15 A...
?: operator (the 'Elvis operator') in PHP
... bar will only be evaluated once.
You can also use this to do a "self-check" of foo as demonstrated in the code example you posted:
foo = foo ?: bar;
This will assign bar to foo if foo is null or falsey, else it will leave foo unchanged.
Some more examples:
<?php
var_dump(5 ?: 0); // 5
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How can I specify a local gem in my Gemfile?
I'd like Bundler to load a local gem. Is there an option for that? Or do I have to move the gem folder into the .bundle directory?
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