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Difference between HashMap, LinkedHashMap and TreeMap
...nge completely when new elements are added.
TreeMap will iterate according to the "natural ordering" of the keys according to their compareTo() method (or an externally supplied Comparator). Additionally, it implements the SortedMap interface, which contains methods that depend on this sort order.
L...
How do I URL encode a string
... of, but since they have not fixed it yet, I have been using this category to url-encode a string:
@implementation NSString (NSString_Extended)
- (NSString *)urlencode {
NSMutableString *output = [NSMutableString string];
const unsigned char *source = (const unsigned char *)[self UTF8Strin...
WCF on IIS8; *.svc handler mapping doesn't work
I'm trying to get a wcf service running in IIS8 on 2012 build 8400.
12 Answers
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Undoing a commit in TortoiseSVN
...rent folders) by accident. What is the easiest, cleanest (and safest!) way to 'undo' that commit without having to delete the files from my working directory?
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git cherry-pick not working
I'm trying to cherry-pick a commit from master and get it into the current production branch. However, when I execute git cherry-pick <SHA-hash> , I just get this message:
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XML Document to String
What's the simplest way to get the String representation of a XML Document ( org.w3c.dom.Document )? That is all nodes will be on a single line.
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Can I add a UNIQUE constraint to a PostgreSQL table, after it's already created?
...E
Also documented in the postgres docs (an excellent resource, plus easy to read, too).
ALTER TABLE tablename ADD CONSTRAINT constraintname UNIQUE (columns);
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Run certain code every n seconds [duplicate]
Is there a way to, for example, print Hello World! every n seconds?
For example, the program would go through whatever code I had, then once it had been 5 seconds (with time.sleep() ) it would execute that code. I would be using this to update a file though, not print Hello World.
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How to get an outline view in sublime texteditor?
How do I get an outline view in sublime text editor for Windows?
5 Answers
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SQL Server IN vs. EXISTS Performance
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That's a good point. The IN statement requires SQL Server to generate a complete result set, and then create a big IF statement I think.
– Randy Minder
Jan 14 '10 at 16:04
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