Standard escape codes are prefixed with Escape
:
- Ctrl-Key:
^[
- Octal:
\033
- Unicode:
\u001b
- Hexadecimal:
\x1B
- Decimal:
27
Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
### | |
### | |
### UPDATE: For Win 11, I recommend using this tool in place of this script: | |
### https://christitus.com/windows-tool/ | |
### https://github.com/ChrisTitusTech/winutil | |
### https://www.youtube.com/watch?v=6UQZ5oQg8XA | |
### iwr -useb https://christitus.com/win | iex | |
### | |
### |
using namespace System.Management.Automation | |
Register-ArgumentCompleter -CommandName ssh,scp,sftp -Native -ScriptBlock { | |
param($wordToComplete, $commandAst, $cursorPosition) | |
$knownHosts = Get-Content ${Env:HOMEPATH}\.ssh\known_hosts ` | |
| ForEach-Object { ([string]$_).Split(' ')[0] } ` | |
| ForEach-Object { $_.Split(',') } ` | |
| Sort-Object -Unique | |
# For now just assume it's a hostname. |
-- show running queries (pre 9.2) | |
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query | |
FROM pg_stat_activity | |
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' | |
ORDER BY query_start desc; | |
-- show running queries (9.2) | |
SELECT pid, age(clock_timestamp(), query_start), usename, query | |
FROM pg_stat_activity | |
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' |
/** | |
* Converts an RGB color value to HSL. Conversion formula | |
* adapted from http://en.wikipedia.org/wiki/HSL_color_space. | |
* Assumes r, g, and b are contained in the set [0, 255] and | |
* returns h, s, and l in the set [0, 1]. | |
* | |
* @param Number r The red color value | |
* @param Number g The green color value | |
* @param Number b The blue color value | |
* @return Array The HSL representation |
This document now exists on the official ASP.NET core docs page.