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How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...th a non-object argument (e.g. ints, floats, structs, non-object pointers, etc.).
13 Answers
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Cron job every three days
... you want it to run on specific days of the month, like the 1st, 4th, 7th, etc... then you can just have a conditional in your script that checks for the current day of the month.
if (((date('j') - 1) % 3))
exit();
or, as @mario points out, you can use date('k') to get the day of the year inst...
How to get an object's properties in JavaScript / jQuery?
... native Object and have internal class names (such as HTMLElement, Window, etc). IE's proprietary ActiveXObject is another example of a host object.
[object] is most commonly seen when alerting DOM objects in Internet Explorer 7 and lower, since they are host objects that have no internal class nam...
How do JavaScript closures work?
...s created and a completely new variable x, and a new set of functions (log etc.) are created, that close over this new variable.
function createObject() {
let x = 42;
return {
log() { console.log(x) },
increment() { x++ },
update(value) { x = value }
}
}
const o = createObject...
Worth switching to zsh for casual use? [closed]
...n-20060301.tar.gz
then copy the bash_completion/bash_completion file to /etc with
sudo cp bash_completion/bash_completion /etc
which will prompt you for your password. You probably will want to make a /etc/bash_completion.d directory for any additional completion scripts (for instance I have t...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...ion file.
Create a text file ~/Library/Application Support/VisualVM/1.3.6/etc/visualvm.conf (replace 1.3.6 with whatever version of VisualVM you're using) containing the line
visualvm_jdkhome="`/usr/libexec/java_home -v '1.7*'`"
and this will force it to choose Java 7 instead of 8.
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Regular expression to match URLs in Java
...
@indivisible luckily, Android is open source and you can fetch the code from github.com/android/platform_frameworks_base/blob/master/core/… :)
– EpicPandaForce
Jan 14 '15 at 17:32
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Getting the object's property name
......
or in node.js 'require.cache[0]' for the first loaded external module, etc. etc.
Object.keys( myObject )[ 0 ]
Object.keys( myObject )[ 1 ]
...
Object.keys( myObject )[ n ]
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How to check if a file exists in Go?
... sometimes it return ENOTDIR instead of NOTEXIST, for example, if /etc/bashrc exist, the /etc/bashrc/foobar will return ENOTDIR
– lidaobing
Nov 23 '13 at 15:23
43
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Why is pow(a, d, n) so much faster than a**d % n?
...bout fitting into a C long, the three-argument form was allowed for float, etc. (Hopefully you're not using 2.1 or earlier, and aren't using any custom integral types from C modules, so none of this matters to you.)
– abarnert
Jan 3 '13 at 6:12
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