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How to remove all whitespace from a string?
...i is built upon the platform-independent ICU library, and has an extensive set of string manipulation functions. The equivalents of the above are:
library(stringi)
stri_replace_all_fixed(x, " ", "")
stri_replace_all_charclass(x, "\\p{WHITE_SPACE}", "")
Here "\\p{WHITE_SPACE}" is an alternate syn...
Match whitespace but not newlines
...hitespace character class \h. This will match tab and space from the ASCII set, non-breaking space from extended ASCII, or any of these Unicode characters
U+0009 CHARACTER TABULATION
U+0020 SPACE
U+00A0 NO-BREAK SPACE (not matched by \s)
U+1680 OGHAM SPACE MARK
U+2000 EN QUAD
U+2001 EM QUAD
U+2002...
When is memoization automatic in GHC Haskell?
... editor after snippets, if snippets enabled
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How to find the largest file in a directory and its subdirectories?
We're just starting a UNIX class and are learning a variety of Bash commands. Our assignment involves performing various commands on a directory that has a number of folders under it as well.
...
Draw in Canvas by finger, Android
....onCreate(savedInstanceState);
dv = new DrawingView(this);
setContentView(dv);
mPaint = new Paint();
mPaint.setAntiAlias(true);
mPaint.setDither(true);
mPaint.setColor(Color.GREEN);
mPaint.setStyle(Paint.Style.STROKE);
mPaint.setStrokeJ...
Delete all but the most recent X files in bash
...nvironment with bash, to run a command to delete all but the most recent X files from a directory?
16 Answers
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How to change the Eclipse default workspace?
...you can go to General>Startup and Shutdown>Workspaces.
There you can set a flag to make Eclipse prompt you to select a workspace at startup by checking the "Prompt for workspace at startup" checkbox.
You can set the number of previous workspaces to remember also. Finally there is a list of rec...
What is the difference between currying and partial application?
I quite often see on the Internet various complaints that other peoples examples of currying are not currying, but are actually just partial application.
...
What are carriage return, linefeed, and form feed?
... a look at Wikipedia:
Systems based on ASCII or a compatible character set use either LF (Line feed, '\n', 0x0A, 10 in decimal) or CR (Carriage return, '\r', 0x0D, 13 in decimal) individually, or CR followed by LF (CR+LF, 0x0D 0x0A). These characters are based on printer commands: The line feed ...
What is a plain English explanation of “Big O” notation?
... In my experience, this is actually typical of discussions in non-academic settings. Apologies for any confusion caused.
Big O complexity can be visualized with this graph:
The simplest definition I can give for Big-O notation is this:
Big-O notation is a relative representation of the complexity ...