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Generate list of all possible permutations of a string
...t? (referring to line 1 and 3 in the pseudocode).
– Håvard Geithus
May 26 '12 at 17:25
6
What is...
How to convert a PNG image to a SVG? [closed]
...nm # PNG to PNM
potrace file.pnm -s -o file.svg # PNM to SVG
Explain options
potrace -s => Output file is SVG
potrace -o file.svg => Write output to file.svg
Example
Input file = 2017.png
convert 2017.png 2017.pnm
Temporary file = 2017.pnm
potrace 2017.pnm -s -o 2017.svg
...
How to capitalize the first letter in a String in Ruby
...want it to, it outputs мария instead of Мария.
If you're using Rails there's an easy workaround:
"мария".mb_chars.capitalize.to_s # requires ActiveSupport::Multibyte
Otherwise, you'll have to install the unicode gem and use it like this:
require 'unicode'
Unicode::capitalize("м...
Multi-line commands in GHCi
...nce provides generalized typing that works for floats as well:
λ: addTwo 2.0 1.0
3.0
If you must provide your own typing, it seems you'll need to use let combined with multiline input (use :set +m to enable multiline input in GHCI):
λ: let addTwo :: Int -> Int -> Int
| addTwo x y = ...
Detecting iOS / Android Operating system
...dow.opera;
// Windows Phone must come first because its UA also contains "Android"
if (/windows phone/i.test(userAgent)) {
return "Windows Phone";
}
if (/android/i.test(userAgent)) {
return "Android";
}
// iOS detection from: http://stackoverflow.com/a/90...
How to print Unicode character in Python?
...o write results to a file. This solved it for me.
– Pål Thingbø
Oct 18 '17 at 8:52
Thank you so much. Spent hours go...
Path to MSBuild
...it looks like
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\2.0
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\3.5
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSBuild\ToolsVersions\4.0
may be what you're after; fire up regedit.exe and have a look.
Query via command line (per...
Remove last character from string. Swift language
...e.endIndex))
print(name) // "Dolphi"
Thanks Zmey, Rob Allen!
Swift 2.0+ Way
There are a few ways to accomplish this:
Via the Foundation extension, despite not being part of the Swift library:
var name: String = "Dolphin"
var truncated = name.substringToIndex(name.endIndex.predecessor())
p...
How do I view the list of functions a Linux shared library is exporting?
... 1: 00000000 0 FUNC GLOBAL DEFAULT UND pthread_mutex_unlock@GLIBC_2.0 (4)
2: 00000000 0 FUNC GLOBAL DEFAULT UND pthread_mutex_destroy@GLIBC_2.0 (4)
3: 00000000 0 NOTYPE WEAK DEFAULT UND _ITM_deregisterTMCloneTable
4: 00000000 0 FUNC GLOBAL DEFAULT UND ...
cannot load such file — bundler/setup (LoadError)
I'm setting Rails 4 application with Ruby 2.0, but I'm getting "Web application could not be started" and get this trace:
1...