Chris Hammock crshmk

I like functional Javascript.

crshmk / replicate.md

Last active December 18, 2024 10:09

Local MongoDb replication

1. Set up replicas

Local Mongo replication

Find mongod.conf

mongosh 

db.serverCmdLineOpts()

crshmk / index.html

Created April 25, 2024 03:07

SVG with border radius

	<!DOCTYPE html>
	<html lang="en">
	<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0">
	<title>SVG with border radius</title>
	</head>
	<body>
	<svg width="400" height="400" viewBox="0 0 400 400">
	<defs>

crshmk / expiry.sql

Last active July 24, 2023 06:04

mysql row expiry strategy

	CREATE TABLE things (
	id int NOT NULL AUTO_INCREMENT PRIMARY KEY,
	created timestamp NULL DEFAULT CURRENT_TIMESTAMP,
	str varchar(10),
	expires timestamp
	);

	INSERT INTO things (str) VALUES ('one');

	CREATE TRIGGER set_thing_expires

crshmk / date_sub.sql

Last active July 23, 2023 07:28

mysql DATE_SUB() (date subtract)

	SELECT CURRENT_TIMESTAMP;

	+---------------------+
	\| current_timestamp \|
	+---------------------+
	\| 2023-07-23 13:28:42 \|
	+---------------------+

	# subtract 10 minutes from current timestamp
	SELECT DATE_SUB(CURRENT_TIMESTAMP, INTERVAL 10 MINUTE);

crshmk / .zshrc

Last active June 6, 2023 23:13

zsh prompt with directory and git branch

	autoload -Uz vcs_info
	precmd() { vcs_info }
	zstyle ':vcs_info:git:*' formats '- %b'
	zstyle ':vcs_info:*' check-for-changes true
	setopt PROMPT_SUBST
	PROMPT='${PWD/#$HOME/~} %F{white}%B${vcs_info_msg_0_}%b%f
	%# '

crshmk / monthLabels.js

Created November 29, 2022 07:13

crshmk / mapKeys.js

Last active October 31, 2022 10:58

Apply a transform function to object keys, recursively

	import { fromPairs, is, map, pipe, toPairs } from 'ramda'

	const isObject = is(Object)

	const transformKey = transform =>
	([k, v]) => !isObject(v) ? [transform(k), v] :
	[transform(k), mapKeys(transform)(v)]

	const mapKeys = transform =>
	pipe(

crshmk / mapObj.js

Created July 4, 2022 16:45

a cleaner Object.entries api

	const mapObj = (fn, obj) =>
	Object.entries(obj).map(([key, value]) => {
	return fn(value, key)
	})

crshmk / getQueryParams.js

Last active December 3, 2022 00:28

	import { fromPairs, map, path, pipe, split, tail } from 'ramda'

	const removeEmptyQuery = filter(complement(isNil))

	const getQueryParams = pipe(
	path(['location', 'search']),
	tail,
	split('&'),
	map(split('=')),
	fromPairs,

crshmk / 11_svelte-file.svelte

Last active November 3, 2022 20:44

Learn Svelte in a gist