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What is the difference between a HashMap and a TreeMap? [duplicate]

...rted key store one another difference is with TreeMap, developer can give (String.CASE_INSENSITIVE_ORDER) with String keys, so then the comparator ignores case of key while performing comparison of keys on map access. This is not possible to give such option with HashMap - it is always case sensitiv...
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Android View.getDrawingCache returns null, only null

...view that has width and height of 0 (i.e. imagine having a TextView with a string text of an empty string). In this case, getDrawingCache will return null, so just be sure to check for that. Hope that helps some people out there. ...
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Async image loading from url inside a UITableView cell - image changes to wrong image while scrollin

...= [UIImage imageNamed:@"placeholder.png"]; NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://myurl.com/%@.jpg", self.myJson[indexPath.row][@"movieId"]]]; NSURLSessionTask *task = [[NSURLSession sharedSession] dataTaskWithURL:url completionHandler:^(NSData * _Nullable da...
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How to use ternary operator in razor (specifically on HTML attributes)?

...side my view to be based on some value and that text is retrieved form App string Resources so, this @() is the solution <a href='#'> @(Model.ID == 0 ? Resource_en.Back : Resource_en.Department_View_DescartChanges) </a> if the text is not from App string Resources use this @(...
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Can Mockito stub a method without regard to the argument?

... the mock. Here is an example. public class MyPojo { public MyPojo( String someField ) { this.someField = someField; } private String someField; @Override public boolean equals( Object o ) { if ( this == o ) return true; if ( o == null || getClass() !...
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“open/close” SqlConnection or keep open?

...public SqlConnection GetConnection() { return new SqlConnection(_connectionString); } – ganders Jan 23 at 17:12 ...
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Argparse: Way to include default values in '--help'?

... Don't forget to include the variable 'type' in your formatting string-- e.g. '%(default)s' for a string, or '%(default)d' for a digit. – strongMA Jan 23 '14 at 22:26 2 ...
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Regular expression matching a multiline block of text

...eak acids.append( line ) At this point you have someVaryingText as a string, and the acids as a list of strings. You can do "".join( acids ) to make a single string. I find this less frustrating (and more flexible) than multiline regexes. ...
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Fundamental difference between Hashing and Encryption algorithms

...ginal input. Say I'm creating a 1-bit hash. My hash function takes a bit string as input and sets the hash to 1 if there are an even number of bits set in the input string, else 0 if there were an odd number. Example: Input Hash 0010 0 0011 1 0110 1 1000 0 Note that there ...
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How do I get the time difference between two DateTime objects using C#?

...display the difference, do something like this:Console.WriteLine((a - b).ToString(@"hh\:mm\:ss")). See: MSDN Custom TimeSpan Format – ishmael Nov 5 '12 at 20:07 ...