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How can I reverse a NSArray in Objective-C?
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For obtaining a reversed copy of an array, look at danielpunkass' solution using reverseObjectEnumerator.
For reversing a mutable array, you can add the following category to your code:
@implementation NSMutableArray (Reverse)
- (void)reverse {
if ([self count] &l...
Should the hash code of null always be zero, in .NET
Given that collections like System.Collections.Generic.HashSet<> accept null as a set member, one can ask what the hash code of null should be. It looks like the framework uses 0 :
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Checking if an instance's class implements an interface?
...possible to determine if it implements a particular interface? As far as I know, there isn't a built-in function to do this directly. What options do I have (if any)?
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“unadd” a file to svn before commit
...mitted changes. Once you've reverted, Subversion provides no way to get back those uncommitted changes.
http://svnbook.red-bean.com/en/1.7/svn.ref.svn.c.revert.html
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Background color not showing in print preview
I am trying to print a page. In that page I have given a table a background color.
When I view the print preview in chrome its not taking on the background color property...
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How to sort a HashMap in Java [duplicate]
How are we able to sort a HashMap<key, ArrayList> ?
17 Answers
17
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Removing an item from a select box
...ems from, or add items to, a select box? I'm running jQuery, should that make the task easier. Below is an example select box.
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Read String line by line
..."line.separator"));
This gives you all lines in a handy array.
I don't know about the performance of split. It uses regular expressions.
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In where shall I use isset() and !empty()
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isset vs. !empty
FTA:
"isset() checks if a variable has a
value including (False, 0 or empty
string), but not NULL. Returns TRUE
if var exists; FALSE otherwise.
On the other hand the empty() function
checks if the variable has an empty
value emp...
How to remove the last character from a string?
...wered Sep 15 '11 at 23:21
Gyan aka Gary BuynGyan aka Gary Buyn
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