大约有 43,000 项符合查询结果（耗时：0.0211秒） [XML]
Add st, nd, rd and th (ordinal) suffix to a number
...this:
function ordinal_suffix_of(i) {
var j = i % 10,
k = i % 100;
if (j == 1 && k != 11) {
return i + "st";
}
if (j == 2 && k != 12) {
return i + "nd";
}
if (j == 3 && k != 13) {
return i + "rd";
}
return i + "...
Reading binary file and looping over each byte
...ead, chunksize), b''), maxlen=0)
Example:
$ dd if=/dev/zero bs=1M count=1000 | python3 blackhole.py
It processes ~1.5 GB/s when chunksize == 32768 on my machine and only ~7.5 MB/s when chunksize == 1. That is, it is 200 times slower to read one byte at a time. Take it into account if you can ...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...justBrightness(ColorMatrix cm, float value) {
value = cleanValue(value,100);
if (value == 0) {
return;
}
float[] mat = new float[]
{
1,0,0,0,value,
0,1,0,0,value,
0,0,1,0,value,
0,0,0,1,0,
0,0,0,0,1
};
cm.postConcat(new Co...
Detect blocked popup in Chrome
...andler like this:
var myPopup = window.open("site-on-my-domain", "screenX=100");
if (!myPopup)
alert("failed for most browsers");
else {
myPopup.onload = function() {
setTimeout(function() {
if (myPopup.screenX === 0)
alert("failed for chrome");
}...
How to open, read, and write from serial port in C?
..."hello!\n", 7); // send 7 character greeting
usleep ((7 + 25) * 100); // sleep enough to transmit the 7 plus
// receive 25: approx 100 uS per char transmit
char buf [100];
int n = read (fd, buf, sizeof buf); // read up to 100 characters i...
Why is require_once so bad to use?
....046600103378296
require_once 1.2219581604004 3.2908599376678
10-100× slower with require_once and it's curious that require_once is seemingly slower in hhvm. Again, this is only relevant to your code if you're running *_once thousands of times.
<?php // test.php
$LIMIT = 1000000;
...
log4net vs. Nlog
...
log4net has launched v1.2.11 on October 2011. I think this answer is obsolete now.
– Mariano Desanze
Oct 25 '11 at 20:30
83
...
What does 'COLLATE SQL_Latin1_General_CP1_CI_AS' do?
...are some that are 90 (for SQL Server 2005, which is version 9.0), most are 100 (for SQL Server 2008, version 10.0), and a small set has 140 (for SQL Server 2017, version 14.0).
I said "for the most part" because the collations ending in _SC were introduced in SQL Server 2012 (version 11.0), but the...
Numpy - add row to array
...rt to numpy. Here are timing tests using python 3.6 vs. numpy 1.14, adding 100 rows, one at a time:
import numpy as np
from time import perf_counter, sleep
def time_it():
# Compare performance of two methods for adding rows to numpy array
py_array = [[0, 1, 2], [0, 2, 0]]
py_row = [4,...
How can I install from a git subdirectory with pip?
...
I just checked and it is part of pip v1.5, released Jan 1 2014: github.com/pypa/pip/blob/develop/CHANGES.txt
– tomka
Feb 10 '14 at 14:10
20
...