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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...when you hit enter, a fork + exec + wait happens like above, and bash then sets $? to the exit status of the forked process.
Note: for built-in commands like echo, a process need not be spawned, and Bash just sets $? to 0 to simulate an external process.
Standards and documentation
POSIX 7 2.5.2 "Sp...
How to render a DateTime object in a Twig template
...names are lowercase. And German dates have a dot appended.
Installation / setting the locale
Installation instructions for the Intl extension can be found in this seperate answer.
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Edit line thickness of CSS 'underline' attribute
...with it using a pair of box-shadows:
.custom-underline{
box-shadow: inset 0 0px 0 white, inset 0 -1px 0 black
}
First shadow is put on top of the second one and that's how you can control the second one by varying the 'px' value of both.
Plus: various colors, thickness and underline positio...
Convert a PHP object to an associative array
...; 1,
'' . "\0" . '*' . "\0" . 'bar' => 2,
'baz' =>
stdClass::__set_state(array(
)),
)
Typecasting this way will not do deep casting of the object graph and you need to apply the null bytes (as explained in the manual quote) to access any non-public attributes. So this works best when...
How to specify more spaces for the delimiter using cut?
...
@Michael, you should set up a cron job somewhere to mail that tip (and possibly others) to you once a month :-)
– paxdiablo
Jan 13 '17 at 2:31
...
How to append to a file in Node?
... so your logs will not be written by timestamp. You can test with example, set 1000 in place of 100000, order will be random, depends on access to file.
If you want to append to a file, you must use a writable stream like this:
var stream = fs.createWriteStream("append.txt", {flags:'a'});
console....
iOS: Compare two dates
...eFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd/MM/yyyy"];
[dateFormatter setLocale:[[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"]
autorelease]];
NSString *stringDate = [dateFormatter stringFromDate:[NSDate date]];
curr...
Regex for splitting a string using space when not surrounded by single or double quotes
I'm new to regular expressions and would appreciate your help. I'm trying to put together an expression that will split the example string using all spaces that are not surrounded by single or double quotes. My last attempt looks like this: (?!") and isn't quite working. It's splitting on the spa...
How can I check whether Google Maps is fully loaded?
... the Maps API v3, this has changed.
In version 3, you essentially want to set up a listener for the bounds_changed event, which will trigger upon map load. Once that has triggered, remove the listener as you don't want to be informed every time the viewport bounds change.
This may change in the fu...
How to iterate a loop with index and element in Swift
Is there a function that I can use to iterate over an array and have both index and element, like Python's enumerate ?
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