wfxr

package main

import "fmt"

func foo1() {
	fmt.Println("Hello, world")
	fmt.Println("Hello, world")
	fmt.Println("Hello, world")
	fmt.Println("Hello, world")
	fmt.Println("Hello, world")

wfxr

package main

import "fmt"

func main() {
	for prime := range primes(100) {
		fmt.Println(prime)
	}
}

wfxr

// vim: set ft=javascript:

settings.tabsMRUOrder = false;

mapkey('T', 'Choose a tab with omnibar', function() {
    Front.openOmnibar({type: "Tabs"});
});

mapkey('gt', '#8Open a URL', function() {
    Front.openOmnibar({type: "URLs", extra: "getAllSites"});

wfxr

gpg --s2k-cipher-algo AES256 --s2k-digest-algo SHA512 --s2k-mode 3 \
    --s2k-count 65000000 --edit-key <key id>

wfxr

// 保证总和为100%的前提下损失精度最小的百分比Rounding算法
import com.google.common.math.IntMath

fun percentageRound(a: List<Double>, precision: Int): List<Double> {
    val factor = IntMath.pow(10, precision)
    val scaled = a.map { it * factor }

    val rounded = scaled.mapIndexed { i, num -> i to Math.round(num) }

    val sum = rounded.fold(0L) { acc, pair -> acc + pair.second }

wfxr

$hexified = "00,00,00,00,00,00,00,00,03,00,00,00,3A,00,1D,00,1D,00,3A,00,00,00,00,00".Split(',') | % { "0x$_"};
$kbLayout = 'HKLM:\System\CurrentControlSet\Control\Keyboard Layout';
New-ItemProperty -Path $kbLayout -Name "Scancode Map" -PropertyType Binary -Value ([byte[]]$hexified);

wfxr

将字符串分割成数组

str='Tom,Jarry'
users=(${(@s/,/)str})

将数组合并成字符串

# 用回车符Join
${(j:\n:)users}

wfxr

基本参数

正向代理

ssh -fCNL

反向代理

ssh -fCNR

wfxr

# bash 遍历文件
if [[ -d "/etc/zsh.d" ]]; then
  for f in /etc/zsh.d/*.zsh(N); do
    source $f
  done
fi
# The (N) tells zsh to set the NULL_GLOB option for that pattern. When no 
# matches are found, the glob expands to an empty string instead of throwing an 
# error. In zsh a for loop over an empty expansion does nothing, which is the 
# behavior we want here.

wfxr

Bash

The testing results for bash is shown in the following table, with each testing command running for 100,000 times:

TESTING COMMAND	RUNNING TIME (REAL, USER, SYS)
type ls &>/dev/null	0m1.476s, 0m0.632s, 0m0.836s
hash ls &>/dev/null	0m1.598s, 0m0.740s, 0m0.856s
command -v ls &>/dev/null	0m1.441s, 0m0.660s, 0m0.776s
which ls &>/dev/null	2m0.418s, 0m3.852s, 0m13.212s
According to the results, type and command -v are the two fastest ways to test the existence of a command in bash. I have also run the tests with either set +h or set -h, but the results do not have obvious difference.