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Execute combine multiple Linux commands in one line
...ground and thus the second job can't know the result, since both jobs will start at the same time. So you might as well just write: { tail -f my.log & }; ./myscript
– Nikos C.
Jun 4 '15 at 9:08
...
What's the difference between an exclusive lock and a shared lock?
... locked, shared locks cannot be obtained.
Other teachers won't come up and start writing either, or the board becomes unreadable, and confuses students => If an object is exclusively locked, other exclusive locks cannot be obtained.
When the students are reading (shared locks) what is on the bo...
Why would someone use WHERE 1=1 AND in a SQL clause?
...<condition>
and concatenate them all together. With the 1=1 at the start, the initial and has something to associate with.
I've never seen this used for any kind of injection protection, as you say it doesn't seem like it would help much. I have seen it used as an implementation convenience...
JavaScript unit test tools for TDD
... use any assertion-library you want with either.
Screencast: Karma Getting started
related:
Should I be using Protractor or Karma for my end-to-end testing?
Can Protractor and Karma be used together?
pros:
Uses node.js, so compatible with Win/OS X/Linux
Run tests from a browser or headless with P...
Long Press in JavaScript?
... if (longpress) {
return false;
}
alert("press");
};
var start = function(e) {
console.log(e);
if (e.type === "click" && e.button !== 0) {
return;
}
longpress = false;
this.classList.add("longpress");
if (presstimer === null) {
pr...
How do you maintain development code and production code? [closed]
...ugs in a separate branch)
the other patch branches will have the luxury to start from a well-defined production label
When it comes to dev branch, you can have one trunk, unless you have other development efforts you need to make in parallel like:
massive refactoring
testing of a new technical l...
How to call an external command?
...
Some hints on detaching the child process from the calling one (starting the child process in background).
Suppose you want to start a long task from a CGI script. That is, the child process should live longer than the CGI script execution process.
The classical example from the subproc...
MISCONF Redis is configured to save RDB snapshots
...ess is already 0 and rdb_last_bgsave_status is ok. After that, you can now start backing up the generated rdb file somewhere safe.
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...
Switch statement for string matching in JavaScript
...se (str.match(/^xyz/) || {}).input:
console.log("Matched a string that starts with 'xyz'");
break;
case (str.match(/test/) || {}).input:
console.log("Matched the 'test' substring");
break;
default:
console.log("Didn't match");
break;
}
Another approach is to use...
How to print register values in GDB?
...xample,
info registers eip
If your executable is 64 bit, the registers start with r. Starting them with e is not valid.
info registers rip
Those can be abbreviated to:
i r rip
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