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A monad is just a monoid in the category of endofunctors, what's the problem?
...onally attributes it to Philip Wadler.
The original quote is from Saunders Mac Lane in Categories for the Working Mathematician, one of the foundational texts of Category Theory. Here it is in context, which is probably the best place to learn exactly what it means.
But, I'll take a stab. The origin...
Detect if device is iOS
...gent and platform strings are changed and differentiating between iPad and MacOS seems possible, so all answers below needs to take that into account now.
This might be the shortest alternative that also covers iOS 13:
function iOS() {
return [
'iPad Simulator',
'iPhone Simulator',
'iP...
Android emulator shows nothing except black screen and adb devices shows “device offline”
...
This also worked for me, I'm on a MacBook early 2015 without any discrete graphic card.
– Simon Stender Boisen
Nov 19 '15 at 15:10
...
Laravel requires the Mcrypt PHP extension
... edited Dec 1 '17 at 16:38
Machavity♦
27.5k1616 gold badges7171 silver badges8787 bronze badges
answered May 30 '13 at 9:17
...
How to convert a SVG to a PNG with ImageMagick?
...nged:
inkscape -w 1024 -h 1024 input.svg --export-filename output.png
(on macOS, you may need to use --export-file instead of --export-filename).
Here's the result of scaling a 16x16 SVG to a 200x200 PNG using this command:
Just for reference, my Inkscape version (on Ubuntu 12.04) is:
Inkscape 0....
How to change my Git username in terminal?
...r=manager you need to open the credential manager of your computer (Win or Mac) and update the credentials there
Here is how it look on windows
Troubleshooting? Learn more
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How to delete from a text file, all lines that contain a specific string?
...h BSD sed:
sed -i '/pattern to match/d' ./infile
Same, but for BSD sed (Mac OS X and FreeBSD) – does not work with GNU sed:
sed -i '' '/pattern to match/d' ./infile
To directly modify the file (and create a backup) – works with BSD and GNU sed:
sed -i.bak '/pattern to match/d' ./infile
...
Google Play on Android 4.0 emulator
...to the image
Now start yaffey on Windows or a similar utility on Linux or Mac, and open system.img for the emulator image you want to modify. I modify most often the one in [...]\android-sdk\system-images\android-17\x86.
Rename the original system.img to system-original.img. Under yaffey, copy the...
How to set specific java version to Maven
On my machine I have two java versions installed: (1.6 and 1.7 installed manually by me). I need both of them for different projects. But for Maven I need 1.7, now my Maven uses 1,6 java version, how can I set Maven to use 1.7?
...
Using a piano keyboard as a computer keyboard [closed]
... in the comments, it's why rank-and-file stenographers can use a stenotype machine to keep up with people talking for hours in a row, when even top-flight typists wouldn't be able to for any length of time via normal typewriter-style keyboards. As with machine stenography, you'd need a "dictionary" ...