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PHP - Modify current object in foreach loop
...uestion){
$questions[$key]['answers'] = $answers_model->get_answers_by_question_id($question['question_id']);
}
This way you save the key, so you can update it again in the main $questions variable
or
foreach($questions as &$question){
Adding the & will keep the $questions updat...
Algorithm to calculate the number of divisors of a given number
...ding this correctly. Start with your largest prime divisor and multiply it by itself until a further multiplication would exceed the number n. Then move to the next lowest factor and times the previous prime ^ number of times it was multiplied by the current prime and keep multiplying by the prime u...
How do malloc() and free() work?
...ks that the virtual memory manager can handle (most often multiples of 512 bytes e.g. 4KB).
So returning 40 Bytes to the OS will just not work. So what does free do?
Free will put the memory block in its own free block list. Normally it also tries to meld together adjacent blocks in the address sp...
Save image from URL by paperclip
Please suggest me a way to save an image from an URL by Paperclip.
8 Answers
8
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Regular expression for floating point numbers
...but it's actually pretty tricky. Let's take a look at your approach, piece by piece:
[-+]?
Match an optional - or +
[0-9]*
Match 0 or more sequential digits
\.?
Match an optional .
[0-9]*
Match 0 or more sequential digits
First, we can clean up this expression a bit by using a character...
JSON and XML comparison [closed]
...ttr("age");
EDIT: Original:
In most programming languages (not all, by any stretch) a map lookup such as this will be more costly than an attribute lookup (like we got above when we parsed the JSON).
This is misleading: remember that in JavaScript (and other dynamic languages) there's no di...
What is the purpose of using -pedantic in GCC/G++ compiler?
...such points. Only those non-ISO constructs that are required to be flagged by a conforming
compiler will generate warnings or errors.
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How to generate a range of numbers between two numbers?
...00*hundreds.n + 1000*thousands.n BETWEEN @userinput1 AND @userinput2
ORDER BY 1
Demo
A shorter alternative, that is not as easy to understand:
WITH x AS (SELECT n FROM (VALUES (0),(1),(2),(3),(4),(5),(6),(7),(8),(9)) v(n))
SELECT ones.n + 10*tens.n + 100*hundreds.n + 1000*thousands.n
FROM x ones...
byte[] to hex string [duplicate]
How do I convert a byte[] to a string ? Every time I attempt it, I get
19 Answers
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contenteditable change events
...
I'd suggest attaching listeners to key events fired by the editable element, though you need to be aware that keydown and keypress events are fired before the content itself is changed. This won't cover every possible means of changing the content: the user can also use cut, c...