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Perform debounce in React.js
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2019: try hooks + promise debouncing
This is the most up to date version of how I would solve this problem. I would use:
awesome-debounce-promise to debounce the async function
use-constant to store that debounced function into the component
re...
How can I convert this foreach code to Parallel.ForEach?
I am a bit of confused about Parallel.ForEach .
What is Parallel.ForEach and what does it exactly do?
Please don't reference any MSDN link.
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About catching ANY exception
...dn't:
try:
do_something()
except:
print "Caught it!"
However, this will also catch exceptions like KeyboardInterrupt and you usually don't want that, do you? Unless you re-raise the exception right away - see the following example from the docs:
try:
f = open('myfile.txt')
s = f....
IN vs OR in the SQL WHERE Clause
...According to the manual for MySQL if the values are constant IN sorts the list and then uses a binary search. I would imagine that OR evaluates them one by one in no particular order. So IN is faster in some circumstances.
The best way to know is to profile both on your database with your specific...
Accurate way to measure execution times of php scripts
I want to know how many milliseconds a PHP for-loop takes to execute.
14 Answers
14
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How to get div height to auto-adjust to background size?
...cient, solution would be to include the image under an img element set to visibility: hidden;. Then make the background-image of the surrounding div the same as the image.
This will set the surrounding div to the size of the image in the img element but display it as a background.
<div style=...
Is there a difference between “throw” and “throw ex”?
...fference between those two are already. (why do I have to even mention this...)
10 Answers
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What is the meaning of id?
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id is a pointer to any type, but unlike void * it always points to an Objective-C object. For example, you can add anything of type id to an NSArray, but those objects must respond to retain and release.
The compiler is totally...
Passing an array by reference
...er, you can pass any size array to them.
void foo(int (&x)[100]);
This only accepts arrays of 100 integers. You can safely use sizeof on x
void foo(int & x[100]); // error
This is parsed as an "array of references" - which isn't legal.
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Change priorityQueue to max priorityqueue
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How about like this:
PriorityQueue<Integer> queue = new PriorityQueue<>(10, Collections.reverseOrder());
queue.offer(1);
queue.offer(2);
queue.offer(3);
//...
Integer val = null;
while( (val = queue.poll()) != null) {
System...