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How can I measure the speed of code written in PHP? [closed]
...rturbating element" is averaged.
Something like this, so, if you want to know how long it take to serialize an array :
$before = microtime(true);
for ($i=0 ; $i<100000 ; $i++) {
serialize($list);
}
$after = microtime(true);
echo ($after-$before)/$i . " sec/serialize\n";
Not perfect, but...
How can strings be concatenated?
...
What happens if you want a multi line string concatenation?
– pyCthon
Nov 28 '13 at 19:52
...
Find object by id in an array of JavaScript objects
...urn e.id == id; });
The result is an array with the items found. If you know that the object is always there and that it only occurs once, you can just use result[0].foo to get the value. Otherwise you should check the length of the resulting array. Example:
if (result.length === 0) {
// no res...
Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?
... not exist through JDBC. Unlike MySQL, PostgreSQL does not support create if not exists syntax. What is the best way to accomplish this?
...
MLKitSegmenter 拓展：人像分割（抠图 / 换背景 / 背景虚化） · App Inventor 2 中文网
...鼠标移动时拖动元素 document.onmousemove = function(e) { if (!isDragging) return; element.style.left = (e.clientX - offsetX) + 'px'; element.style.top = (e.clientY - offsetY) + 'px'; }; // 鼠标释放时停止拖动 document.onmouseup = function(...
What is the difference between a definition and a declaration?
...ng that's been declared and referenced somewhere, then the linker doesn't know what to link references to and complains about a missing symbols. If you define something more than once, then the linker doesn't know which of the definitions to link references to and complains about duplicated symbols....
Android: How to put an Enum in a Bundle?
... @clu By not expecting custom fields to be serialised. It works fine if its just a normal enum like in the code above.
– bluehallu
Jan 11 '16 at 12:39
...
Finding quaternion representing the rotation from one vector to another
...
@sinisterchipmunk Actually, if v1 = v2, crossproduct would be (0,0,0) and w would be positive, which normalizes to identity. According to gamedev.net/topic/… it should work just fine also for v1 = -v2 and in their close vicinity.
...
Application auto build versioning
... Note that before Go 1.5 this option took two separate arguments.
Now it takes one argument split on the first = sign.
As part of your build process, you could set a version string variable using this. You can pass this through the go tool using -ldflags. For example, given the following s...
In Scala how do I remove duplicates from a list?
...
scala.collection.immutable.List now has a .distinct method.
So calling dirty.distinct is now possible without converting to a Set or Seq.
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