This function creates a registration code with 8 ASCII characters. The aim is to send a user a secret, which can be easily copied by the user into a registration dialog. The secret uses a reduced alphabet of 32 letters and digits. Characters known to be commonly confused by users are removed. The secret is not a password. It is just a personal token to enable the registration in order to prevent annonymous registration attempts.
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| package main | |
| import ( | |
| dbg "runtime/debug" | |
| fmt "fmt" | |
| os "os" | |
| tm "time" | |
| ) | |
| func outer() { |
ceving
/ Web Component for Copyright Years.md
Last active
April 21, 2024 09:46
Web Component for Copyright Years
Suppose you have cloned https://github.com/CVEProject/cvelistV5
Find all CVE-IDs for which the assignerShortName of the cveMetadata is "Go":
find cves -type f -name 'CVE-*.json' -exec cat {} + |
jq -r '.cveMetadata | select(.assignerShortName == "Go") | .cveId'
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| #! /bin/bash | |
| if [[ -e "$1" && ! -d "$1" ]]; then | |
| jq -C . "$@" | |
| else | |
| jq -C "${@-.}" | |
| fi | | |
| less -R | |
ceving
/ bounce.html
Last active
February 14, 2024 20:52
Bouncing Ball with requestAnimationFrame in JavaScript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Bounce</title> | |
| <style> | |
| body { background: silver; } | |
| canvas { background: white; } | |
| span.sign { display: inline-block; white-space: pre; width: 1ch; text-align: center; } | |
| span.number { display: inline-block; white-space: pre; } |
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| #! /bin/bash | |
| set -eu | |
| usage() { echo "Usage: $0 [-w WAIT] [PNGFILE]" 1>&2; } | |
| while getopts "w:h" o; do | |
| case "${o}" in | |
| w) wait=$((OPTARG));; | |
| h) usage; exit 0;; | |
| *) exit 1;; |
ceving
/ Processing tabular data with JQ instead of AWK.md
Last active
January 26, 2024 08:59
Processing tabular data with JQ instead of AWK
The following produces a table with two columns: a date and a file name.
$ find /etc/network -type f -printf '%T@\t%p\n'
1670618223.0000000000 /etc/network/if-down.d/resolved
1689161114.2422386520 /etc/network/interfaces
1673911860.0000000000 /etc/network/if-up.d/ntpsec-ntpdate
1670618223.0000000000 /etc/network/if-up.d/resolved
This is the URL of the specification of the WASM instructions.
https://webassembly.github.io/spec/core/appendix/index-instructions.html
This is some JavaScript which extracts the instructions.
(opcodes => {NewerOlder