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Equivalent of .try() for a hash to avoid “undefined method” errors on nil? [duplicate]
In Rails we can do the following in case a value doesn't exist to avoid an error:
12 Answers
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When to use UICollectionView instead of UITableView?
...with UICollectionview, it would be easy.
When using UICollectionview, you don't need to set buttons with tags or other things by getting selected items values. You can simply get -(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath and in UITabl...
CA2202, how to solve this case
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Edit in response to the comments:
I just verified again that this code does not generate the warning, while the original one does.
In the original code, CryptoStream.Dispose() and MemoryStream().Dispose() are actually called twice (which may or may not be a problem).
The modified code works as...
Is it OK to use == on enums in Java?
Is it OK to use == on enums in Java, or do I need to use .equals() ? In my testing, == always works, but I'm not sure if I'm guaranteed of that. In particular, there is no .clone() method on an enum, so I don't know if it is possible to get an enum for which .equals() would return a diffe...
PHP - include a php file and also send query parameters
...m my php script based on certain conditions. I have an if condition and am doing an "include" if the condition is satisfied.
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When is it acceptable to call GC.Collect?
...ccording to MS source code calling GC.Collect(2) every 850ms is just fine. Don't believe? Then just see PresentationCore.dll, MS.Internal.MemoryPressure.ProcessAdd(). I currently have an image processing app (small images, nothing with real memory pressure) where calling GC.Collect(2) takes longer t...
How to add images in select list?
... { background-image:url(others.png); }
In other browsers the only way of doing that would be using some JS widget library, like for example jQuery UI, e.g. using Selectable.
From jQuery UI 1.11, Selectmenu widget is available, which is very close to what you want.
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Does Java have a path joining method? [duplicate]
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Doesn`t work in Java 8. Better option: import java.nio.file.Paths; Path path = Paths.get(mydir, "myfile");
– Marc Wittmann
May 7 '15 at 10:58
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Saving changes after table edit in SQL Server Management Studio
...p table and then re-inserted in the new table. Since SQL Server by default doesn't trust you, you need to say "OK, I know what I'm doing, now let me do my work."
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Remove characters after specific character in string, then remove substring?
...ing manipulation, if you just want to kill everything after the ?, you can do this
string input = "http://www.somesite.com/somepage.aspx?whatever";
int index = input.IndexOf("?");
if (index > 0)
input = input.Substring(0, index);
Edit: If everything after the last slash, do something like ...