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List of Big-O for PHP functions
After using PHP for a while now, I've noticed that not all built-in PHP functions are as fast as expected. Consider these two possible implementations of a function that finds if a number is prime using a cached array of primes.
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Is there YAML syntax for sharing part of a list or map?
So, I know I can do something like this:
5 Answers
5
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Why is auto_ptr being deprecated?
...f assignments supported by auto_ptr
copy assignment (4) culprit
Now coming to the reason WHY the copy assignment itself was so disliked, I have this theory :
Not all programmers read books or standards
auto_ptr on the face of it, promises you ownership of the object
the little-* (pun in...
What are the Dangers of Method Swizzling in Objective-C?
... calls that, but the _cmd argument isn't setFrame: like it should be. It's now my_setFrame:. The original implementation is being called with an argument it never expected it would receive. This is no good.
There's a simple solution — use the alternative swizzling technique defined above. The arg...
Iterator invalidation rules
...m not sure how the rehashing part could be mapped on insert/erase, do you know of a way to check whether a rehash will be triggered or not ?
– Matthieu M.
Jun 22 '11 at 10:33
1
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How to decide when to use Node.js?
...sistent connection from the browser back to the server. Using a technique known as "long-polling", you can write an application that sends updates to the user in real time. Doing long polling on many of the web's giants, like Ruby on Rails or Django, would create immense load on the server, because ...
Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
.../a/11227902/1001643
Compilers typically don't have enough information to know which branches will alias and whether those aliases will be significant. However, that information can be determined at runtime with tools such as Cachegrind and VTune.
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What is the scope of variables in JavaScript?
...passed the point of declaration in the source code. The interim period is known as the temporal dead zone.
function f() {
function g() {
console.log(x)
}
let x = 1
g()
}
f() // 1 because x is hoisted even though declared with `let`!
Function parameter names
Function...
Rotated elements in CSS that affect their parent's height correctly
...dth of your element is small enough that the text wraps: */
white-space: nowrap;
}
Stack snippet demo
p {
/* Tweak the visuals of the paragraphs for easier visualiation: */
background: pink;
margin: 1px 0;
border: 1px solid black;
}
.rotation-wrapper-outer {
display: table;...
Releasing memory in Python
...ere a way to force Python to release all the memory that was used (if you know you won't be using that much memory again)?
No, there is not. But there is an easy workaround: child processes.
If you need 500MB of temporary storage for 5 minutes, but after that you need to run for another 2 hours a...