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Is recursion ever faster than looping?
...airly expensive compared to iteration (in general) because it requires the allocation of a new stack frame. In some C compilers, one can use a compiler flag to eliminate this overhead, which transforms certain types of recursion (actually, certain types of tail calls) into jumps instead of function...
Splitting a Java String by the pipe symbol using split(“|”)
... you are my second choice as a moderator on stack overflow. All the best.
– Däñish Shärmà
Nov 19 '16 at 11:11
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Undo scaffolding in Rails
...an destroy/undo it using
rails destroy scaffold MyFoo
That will delete all the files created by generate, but not any additional changes you may have made manually.
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How do you change text to bold in Android?
...droid:textStyle
Examples:
android:textStyle="bold|italic"
Programmatically the method is:
setTypeface(Typeface tf)
Sets the typeface and style in which the text should be displayed. Note that not all Typeface families actually have bold and italic variants, so you may need to use setTypeface...
Is calculating an MD5 hash less CPU intensive than SHA family functions?
...s with sphlib, a library of hash function implementations in C (and Java). All implementations are from the same author (me) and were made with comparable efforts at optimizations; thus the speed differences can be considered as really intrinsic to the functions.
As a point of comparison, consider ...
How can I check if a key exists in a dictionary? [duplicate]
...
if key in array:
# do something
Associative arrays are called dictionaries in Python and you can learn more about them in the stdtypes documentation.
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npm not working after clearing cache
... not work for me on Windows 10 (no errors, just did nothing). I had to manually delete all the folders within %appdata%\npm-cache
– plasmid87
Dec 7 '17 at 16:18
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NSString with \n or line break
...instance of NSString named myString read in from my .plist file, I had to call...
myString = [myString stringByReplacingOccurrencesOfString:@"\\n" withString:@"\n"];
... before assigning it to my UILabel instance...
myLabel.text = myString;
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What do
...hat they're subclasses of a generic function type (From) => To, but that's all it says. Um, what? Maybe there's documentation somewhere, but search engines don't handle "names" like "
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How can I select the first day of a month in SQL?
...dOfMonth will give you the last day of the month.
– hallizh
Nov 3 '15 at 13:47
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How can I determ...