Skip to content

Instantly share code, notes, and snippets.

View overthink's full-sized avatar

Mark Feeney overthink

18 followers · 7 following
View GitHub Profile
@overthink
overthink / copy-of-bash-init.md
Created June 20, 2018 17:01
Copy of https://github.com/0cjs/sedoc/blob/master/lang/bash/init.md in case original disappears (don't want to fork whole repo).

Bash Initalization Behaviour

A Bash process may be:

State Invocation
Login (L) argv[0][0] == '-', --login
Interactive (I) -i, stdin is tty
Remote (R) stdin is "network connection" (see below)
@overthink
overthink / core$simple.class
Last active June 13, 2018 18:14
Compile Clojure regex literals.
Classfile /home/mark/src/clj-re/target/classes/clj_re/core$simple.class
Last modified 13-Jun-2018; size 1119 bytes
MD5 checksum 7a8f0ea3a3b22a33c335acffef1eda0a
Compiled from "core.clj"
public final class clj_re.core$simple extends clojure.lang.AFunction
minor version: 0
major version: 49
flags: ACC_PUBLIC, ACC_FINAL, ACC_SUPER
Constant pool:
#1 = Utf8 clj_re/core$simple
@overthink
overthink / gist:e6a4a9264110190b7e00f1a3880599f1
Last active May 29, 2018 13:52
Demo of why vals in traits are "bad" (aka you have to be very careful)
The issue is that the superclass gets instantiated first, and if it has an eager val that
calls an abstract def (or abstract lazy val, if such a thing is possible) it will capture
the not-yet-fully-initialized value of that val in the subclass (which is usually null).
scala> trait T { def f: String; val callsF = f } // *val* `callsF` calls abstract def `f` -- risky!
defined trait T
scala> object X extends T { val f = "foooo" } // `f` is implemented with a strict val -- bomb is set
defined object X
@overthink
overthink / parens.scala
Created April 30, 2018 14:52
Fiddling with scala empty parens vs. parameterless
object Parens {
def parameterless: String = "foo"
def emptyParens(): String = "bar"
def fireNukes(): String = "nukes fired"
def log(f: () => String): Unit = { println("fn: " + f) }
def log(msg: String): Unit = { println("string: " + msg) }
def main(args: Array[String]) {
@overthink
overthink / find-dup-repo-files
Created April 18, 2018 20:34
find duplicate files in a git repo
#!/usr/bin/python
# Print filenames that are duplicated at least once (by content hash) in the
# repo.
import fileinput
from collections import defaultdict
import subprocess
digest_to_path = defaultdict(list)
p = subprocess.Popen(
@overthink
overthink / get-loved
Created December 9, 2017 05:16
Get artist, track name, url from last.fm loved tracks for a user.
#!/bin/bash
set -euo pipefail
API_KEY=$(cat ~/.lastfm_api_key)
LASTFM_USER="overthink"
LIMIT=1000
getpage() {
local page="${1?need page number to fetch}"
curl -s "http://ws.audioscrobbler.com/2.0/?method=user.getlovedtracks&user=$LASTFM_USER&api_key=$API_KEY&format=json&limit=$LIMIT&page=$page" \
@overthink
overthink / die-on-nils.clj
Last active December 15, 2016 20:54
Sort of nice nil checker in Clojure
(defn- ellipses-if-long
"Append \"...\" to string version of x if x's length exceeds n."
([x] (ellipses-if-long x 50))
([x n]
(assert (pos? n) "n must be positive")
(let [s (str x)]
(if (> (.length s) n)
(str (subs s 0 n) "...")
s))))
@overthink
overthink / app.js
Created August 7, 2016 06:47 — forked from mjackson/app.js
Using webpack with pixi.js
var PIXI = require('pixi.js')
console.log(PIXI)
@overthink
overthink / mocks.clj
Last active December 1, 2015 16:58
(ns foo.core
"Looking at ways to mock out records when testing and also using schema."
(:require
[schema.core :as s]))
;; approach 1 (problematic for mocks) --------------------------------------------------
(s/defrecord Thing
[name :- s/Str
age :- s/Int])
@overthink
overthink / gist:c7efe144abbd23524004
Created April 30, 2015 19:56
Bytecode for Using.apply()
public <A extends java/lang/Object, B extends java/lang/Object> B apply(A, scala.Function1<A, B>);
flags: ACC_PUBLIC
Code:
stack=3, locals=7, args_size=3
0: aload_2
1: aload_1
2: invokeinterface #77, 2 // InterfaceMethod scala/Function1.apply:(Ljava/lang/Object;)Ljava/lang/Object;
7: astore_3
8: aload_1
9: ifnull 37