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How do I write a bash script to restart a process if it dies?
...the process' parent. What does this mean? It means only the process that starts your process can reliably wait for it to end. In bash, this is absolutely trivial.
until myserver; do
echo "Server 'myserver' crashed with exit code $?. Respawning.." >&2
sleep 1
done
The above piec...
Easiest way to activate PHP and MySQL on Mac OS 10.6 (Snow Leopard), 10.7 (Lion), 10.8 (Mountain Lio
... bit x86 version).
Install all the MySQL components. Using the pref pane, start MySQL.
In the Sharing System Pref, turn on (or if it was already on, turn off/on) Web Sharing.
You should now have Apache/PHP/MySQL running.
In 10.4 and 10.5 it was necessary to modify the php.ini file to point to th...
NSRange to Range
...ngeCharactersInRange:replacementString: method won't provide a range which starts or ends inside a unicode character, since the callback is based on a user entering characters from the keyboard, and it's not possible to type only part of an emoji unicode character. Note that if the delegate were wri...
How do I run a node.js app as a background service?
...ith your app's name, obviously):
[Unit]
Description=My app
[Service]
ExecStart=/var/www/myapp/app.js
Restart=always
User=nobody
# Note Debian/Ubuntu uses 'nogroup', RHEL/Fedora uses 'nobody'
Group=nogroup
Environment=PATH=/usr/bin:/usr/local/bin
Environment=NODE_ENV=production
WorkingDirectory=/va...
How can I unit test Arduino code?
...ibrary:
#include <sys/timeb.h>
#include "mock_arduino.h"
timeb t_start;
unsigned long millis() {
timeb t_now;
ftime(&t_now);
return (t_now.time - t_start.time) * 1000 + (t_now.millitm - t_start.millitm);
}
void delay( unsigned long ms ) {
unsigned long start = millis();
whi...
How do I get a substring of a string in Python?
...h the string maintains consistency with being able to array slice from the start or end.
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Lombok is not generating getter and setter
...
When starting with a fresh eclipse installation you, in fact, need to "install" Lombok before being able to use it.
Go where you Lombok jar is (e.g. (e.g. you can find in ~/.m2/repository/org/projectlombok/lombok/1.16.10/lombok-...
What happens if a Android Service is started multiple times?
...
The Service will only run in one instance. However, everytime you start the service, the onStartCommand() method is called.
This is documented here
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javascript: pause setTimeout();
...in the question:
var Timer = function(callback, delay) {
var timerId, start, remaining = delay;
this.pause = function() {
window.clearTimeout(timerId);
remaining -= Date.now() - start;
};
this.resume = function() {
start = Date.now();
window.clearTi...
How to run multiple DOS commands in parallel?
...
You can execute commands in parallel with start like this:
start "" ping myserver
start "" nslookup myserver
start "" morecommands
They will each start in their own command prompt and allow you to run multiple commands at the same time from one batch file.
Hope t...