Skip to content

Instantly share code, notes, and snippets.

Avatar
👋

Jeff Dickey jdxcode

👋
View GitHub Profile
@jdxcode
jdxcode / client.go
Last active Mar 28, 2021
basic IPC example connecting node and golang together with unix socket (named pipe)
View client.go
package main
import (
"io"
"log"
"net"
"time"
)
func reader(r io.Reader) {
@jdxcode
jdxcode / pg_perf.sql
Last active Feb 8, 2021
PostgreSQL performance queries
View pg_perf.sql
/* index performance */
SELECT
relname,
100 * idx_scan / (seq_scan + idx_scan) percent_of_times_index_used,
n_live_tup rows_in_table
FROM
pg_stat_user_tables
WHERE
seq_scan + idx_scan > 0
ORDER BY
@jdxcode
jdxcode / boot.js
Last active Nov 11, 2020
zero-downtime node.js app runner
View boot.js
// This script will boot app.js with the number of workers
// specified in WORKER_COUNT.
//
// The master will respond to SIGHUP, which will trigger
// restarting all the workers and reloading the app.
var cluster = require('cluster');
var workerCount = process.env.WORKER_COUNT || 2;
// Defines what each worker needs to run
View go15.html
<!--{
"Title": "Go 1.15 Release Notes",
"Path": "/doc/go1.15"
}-->
<!--
NOTE: In this document and others in this directory, the convention is to
set fixed-width phrases with non-fixed-width spaces, as in
<code>hello</code> <code>world</code>.
Do not send CLs removing the interior tags from such phrases.
-->
View gist:7f56bbecebba7e4841d36e8387ec612c
--- Actions ---
$Copy <M-C>
$Cut <M-X> <S-Del>
$Delete <Del> <BS> <M-BS>
$LRU
$Paste <M-V>
$Redo <M-S-Z> <A-S-BS>
$SearchWeb
$SelectAll <M-A>
$Undo <M-Z>
View fish-cheat-sheet.md

builtin

  • Tab completes the current token. Shift, Tab completes the current token and starts the pager's search mode.
  • Alt+←,Left and Alt+→,Right move the cursor one word left or right (to the next space or punctuation mark), or moves forward/backward in the directory history if the command line is empty. If the cursor is already at the end of the line, and an autosuggestion is available, Alt+→,Right (or Alt+F) accepts the first word in the suggestion.
  • Shift,←,Left and Shift,→,Right move the cursor one word left or right, without stopping on punctuation.
  • ↑ (Up) and ↓ (Down) (or Control+P and Control+N for emacs aficionados) search the command history for the previous/next command containing the string that was specified on the commandline before the search was started. If the commandline was empty when the search started, all commands match. See the history section for more information on history searching.
  • Alt+↑,Up and Alt+↓,Down search the command history for the previous/next token containing th
View downloading node binary script.sh
#!/bin/bash
set -euo pipefail
# Downloads a node tarball from https://nodejs.org/dist/ and extracts just
# the binary into the current directory. Chiefly we use this to get a node
# binary for uploading to manifold.
if [[ $# -ne 4 ]]; then
echo "USAGE: $0 <node_version> <os> <arch> <filename>"
exit 1
View downloading node tarball script.sh
#!/bin/bash
set -euxo pipefail
# Downloads a node tarball from https://nodejs.org/dist/ and extracts just
# the binary into the current directory. Chiefly we use this to get a node
# binary for uploading to manifold.
if [[ $# -ne 4 ]]; then
echo "USAGE: $0 <node_version> <os> <arch> <filename>"
exit 1
@jdxcode
jdxcode / context.cpp
Last active May 4, 2020
c++ check if pid is running
View context.cpp
bool pid_id_active(pid_t pid) {
return kill(pid, 0) == 0;
}
View main.cpp
#include <fstream>
int main() {
std::ofstream f{"myfile.txt"};
f << "sometext" << std::endl;
if (!f)
throw std::system_error(errno, std::system_category(), "failed to open file");
return 0;
}