Today I learned

cluelessPHP · 2017-01-24T15:40:01+00:00

I was thinking about what Brad Jones had said, so I was thought it might be fun to post what you learned today if anything. Today I learned iPad pro overla...

Today I learned

dalecosp

/usr/bin/yes, a rather obscure UNIX utility.

And that it can also cuss, according to the manual. Actually, it repeats whatever you tell it to, ∞ times (e.g. until CTL-C, or a broken pipe, which comes in useful in the case below).

Since my "cp" is aliased, as yours probably is also, to "cp -i", this came in handy for a directory full (2400+) of overwrites:

[root@www]  yes | cp /my/restored/backup /usr/local/www/somesite/html

It also may have come into handy to cuss when I discovered the need to restore the HTML for "somesite". But maybe not ... I'm not tellin'. 😃

cluelessPHP

Today I learned, is a thing

http://php.net/manual/en/language.oop5.visibility.php

dalecosp

cluelessPHP;11060893 wrote:
Today I learned, is a thing

http://php.net/manual/en/language.oop5.visibility.php

Yay! Good for you. :-)

Now get read for all kinds of errors about "can't access protected property $foo" 😃

cluelessPHP

dalecosp;11060895 wrote:
Yay! Good for you. :-)

Now get read for all kinds of errors about "can't access protected property $foo" 😃

That's how I learned what it was 😃

cluelessPHP

Today I learned var_dump and var_export are not always helpful

SerenityPantone

Today I learned a lot of things from you all sharing information you learnt.:p

Bonesnap

Diablo II, a game released pre-XP, runs better in WINE than it ever did in Windows.

cluelessPHP

Bonesnap;11060929 wrote:
Diablo II, a game released pre-XP, runs better in WINE than it ever did in Windows.

Diablo 2, now that was a fun game.

Today I learned the opticians are becoming just as vindictive as the dentist.

"oh don't worry it's just a puff of air"
puff
me "#&@$!!!"
"sorry was that sore?"
long drawn out sigh...

NogDog

Wait until you get to have a retinal specialist stick a lens thingy directly onto your eye, then shoot laser pulses through it to "spot weld" your torn retina. The front of the eyeball was numbed, but the back of it wasn't. 🙁

cluelessPHP

Sounds almost like the time I had an eye infection. The "doctor" strapped me into some machine then proceeded to ask if it was sore being poked in the eye, my response wasn't flattering

cluelessPHP

Today I learned how to find Mars

dalecosp

Mars is in the Milky Way! I can usually find it down at the corner convenience store with minimal searching:

Dunno that it's common in any part of the UK though ....

cluelessPHP

Never seen it but I need it in my life now :eek:

Oh and I learned

<?php

class UserStore
{
	private $users = array();

function addUser($name, $mail, $pass)
{
	if(isset($this->users[$mail])){
		throw new Exception(
		"User {$mail} already in use");
	}

	if (strlen($pass) < 5){
		throw new Exception("Password must have 5 or more letters");
	}

	$this->users[$mail] = array('pass' => $pass,
								'mail' => $mail,
								'name' => $name
								);
	return true;
}

function notifyPasswordFailure($mail){
	if(isset($this->users[$mail])){
		$this->users[$mail]['failed']=time();
	}
}

function	getUser($mail){
	return ($this->users[$mail]);
}
}

class Validator{
	private $store;

public function __construct(UserStore $store)
{
	$this->store = $store;
}

public function validateUser ($mail, $pass)
{
	if (!is_array($user = $this->store->getUser($mail)))
	{
		return false;
	}

	if($user['pass'] == $pass)
	{
		return true;
	}
	$this->store->notifyPasswordFailure($mail);
return false;
}
}
$store = new UserStore();
$store->addUser("bob williams", "bob@example.com", "123");

$validator = new validator($store);
if ($validator->validateUser("bob@example.com", "12345"))
{
	print "pass, friend!\n";
}

cluelessPHP

I also learned it's easy to double post

Weedpacket

...that Family Guy's pastiche of Of Mice And Men is faithful enough to the original that I'm glad I never had to read the latter.

dalecosp

Weedpacket;11061247 wrote:
...that Family Guy's pastiche of Of Mice And Men is faithful enough to the original that I'm glad I never had to read the latter.

I don't know if that's hilarious, or scary. :eek:

//Avoid JS errors by actually checking if the DOM element exists before calling a method on it.
//For some reason this hadn't occurred to me before ... probably because I didn't know "contains" ... ;)

if (document.body.contains(document.getElementById('foobar')) {
    document.getElementById('foobar').something();
}

And it's not like I had errors firing because of it, but it will simplify a lot of places where the JS was checking the page's URL to see if it should or shouldn't do something....

NogDog

Learned a simple trick to keep a cron-launched bash script from only ever running one instance, via a file lock.

#!/usr/bin/env bash
(
  flock -n 9 || exit 1
  /home/nogdog/foo.sh >> ~/foo.log
) 9>/tmp/foo_lockfile

dalecosp

NogDog;11061345 wrote:
Learned a simple trick to keep a cron-launched bash script from only ever running one instance, via a file lock.
#!/usr/bin/env bash
(  flock -n 9 || exit 1  /home/nogdog/foo.sh >> ~/foo.log) 
9>/tmp/foo_lockfile

Nice ... linkage, or explanation? 🙂

Edit: Nvm ... Linux has flock(1). Funny, BSD only has flock(2).

NogDog

dalecosp;11061351 wrote:
Nice ... linkage, or explanation? 🙂

Edit: Nvm ... Linux has flock(1). Funny, BSD only has flock(2).

Mostly a copy/edit from some search result, so take OS/shell intercompatibility with a grain of salt. Working fine for me in Centos Linux with Bash shell. 🙂

Bonesnap

I discovered sshfs a couple days ago. I'll never use Samba again. SSH should be one of the Seven Wonders of the World.