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Define a lambda expression that raises an Exception
...ent; for no arguments, use lambda : [][0]; for two, use lambda x,y: [][0]; etc.)
– Kyle Strand
Jan 24 '13 at 23:21
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How to create NS_OPTIONS-style bitmask enumerations in Swift?
...om array literal syntax, queries like contains, masking with intersection, etc. (No more having to remember which funny character to use for which membership test!)
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In Python, when to use a Dictionary, List or Set?
...g from zero - the first one is numbered zero, the
second 1, the third 2, etc. You can remove values from the list, and
add new values to the end. Example: Your many cats' names.
Dictionaries are similar to what their name suggests - a dictionary.
In a dictionary, you have an 'index' of wo...
Collect successive pairs from a stream
...enient static methods to create the stream from Collection, array, Reader, etc. Edited the answer.
– Tagir Valeev
May 30 '15 at 16:06
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Difference between scaling horizontally and vertically for databases [closed]
... involves downtime.
In-Memory Data Grids such as GigaSpaces XAP, Coherence etc.. are often optimized for both horizontal and vertical scaling simply because they're not bound to disk. Horizontal-scaling through partitioning and vertical-scaling through multi-core support.
You can read more on this s...
Piping buffer to external command in Vim
...rnal stdin from the command line:
vim -es +"w >> /dev/stdout" -cq! /etc/hosts
It's useful for scripting purposes.
For more command-line tricks, check:
How to write whole buffer to standard output from the command line?
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Sending a message to nil in Objective-C
...ically zeroed. So design you API so that it can respond to 0/nil/NIL/NULL etc.
– Cthutu
Mar 21 '12 at 18:28
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What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
...ass.newInstance() is strongly discouraged. It's recommended to use Class.getConstructor(), followed by Constructor.newInstance() in turn. It avoids masking possible exceptions.
– L S
Mar 27 '13 at 14:57
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Difference between hard wrap and soft wrap?
...n actual line). You can also jump straight to a line by typing :10 or :30, etc.
– daviewales
Apr 25 '16 at 8:49
If you...
How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...bunch of colors I won't use UIColors since I will be probably using OpenGL,etc. In my opinion this method has no real life usage but is very good for educational purposes.
– nacho4d
Jan 12 '11 at 4:08
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