gaearon

function mapValues(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    result[key] = fn(obj[key], key);
    return result;
  }, {});
}

function pick(obj, fn) {
  return Object.keys(obj).reduce((result, key) => {
    if (fn(obj[key])) {

mattes

if _, err := os.Stat("/path/to/whatever"); os.IsNotExist(err) {
	// path/to/whatever does not exist
}

if _, err := os.Stat("/path/to/whatever"); !os.IsNotExist(err) {
	// path/to/whatever exists
}

egmontkob

Hyperlinks (a.k.a. HTML-like anchors) in terminal emulators

[ Update 2020-05-31: I won't be maintaining this page or responding to comments anymore (except for perhaps a few exceptional occasions). ]

---

Most of the terminal emulators auto-detect when a URL appears onscreen and allow to conveniently open them (e.g. via Ctrl+click or Cmd+click, or the right click menu).

It was, however, not possible until now for arbitrary text to point to URLs, just as on webpages.

NeuroWinter

FFMPEG '-i', file, '-c:v', 'libopenjpeg', "jpeg2000\\" + name + ".jp2"\

Convert image to jpeg2000
	ffmpeg -i in.png -c:v libopenjpeg out.jp2
	Hex Edit out.jp2
	ffmpeg -i in.jp2 -c:v png out.png

General Edit
ffmpeg -i input.avi -c:v mpeg2video -g 999 -q:v 1 output.avi
*edit in avidemux/whatever*

michiel

#
# Wide-open CORS config for nginx
#
location / {

     if ($request_method = 'OPTIONS') {

        add_header 'Access-Control-Allow-Origin' '*';
        
        #

dvliman

$: (Dollar Colon) is basically a shorthand version of $LOAD_PATH. $: contains an array of paths that your script will search through when using require.
$0 (Dollar Zero) contains the name of the ruby program being run. This is typically the script name.
$* (Dollar Splat) is basically shorthand for ARGV. $* contains the command line arguments that were passed to the script.
$? (Dollar Question Mark) returns the exit status of the last child process to finish.
$$ (Dollar Dollar) returns the process number of the program currently being ran.
$~ (Dollar Tilde) contains the MatchData from the previous successful pattern match.
$1, $2, $3, $4 etc represent the content of the previous successful pattern match.
$& (Dollar Ampersand) contains the matched string from the previous successful pattern match.
$+ (Dollar Plus) contains the last match from the previous successful pattern match.
$` (Dollar Backtick) contains the string before the actual matched string of the previous successful pattern match.

rauchg

require-from-twitter

Since Twitter doesn't have an edit button, it's a suitable host for JavaScript modules.

How to use

Source tweet: https://twitter.com/rauchg/status/712799807073419264

const leftPad = await requireFromTwitter('712799807073419264');

m1

# How to throttle the FCC to dial up modem speeds on your website using Apache.

# Ported from https://gist.github.com/kyledrake/e6046644115f185f7af0

## The blog post that started it all: https://neocities.org/blog/the-fcc-is-now-rate-limited
##
## Current known FCC address ranges:
## https://news.ycombinator.com/item?id=7716915
##
## Confirm/locate FCC IP ranges with this: http://whois.arin.net/rest/net/NET-165-135-0-0-1/pft

shuxiang

from flask.ext.sqlalchemy import SQLAlchemy

def get_model(self, name):
    return self.Model._decl_class_registry.get(name, None)
SQLAlchemy.get_model = get_model

def get_model_by_tablename(self, tablename):
  for c in self.Model._decl_class_registry.values():
    if hasattr(c, '__tablename__') and c.__tablename__ == tablename:
      return c

grejppi

#ifndef BIQUAD_H
#define BIQUAD_H

#include <math.h>
#include <stdint.h>

#ifndef M_PI
#   define M_PI 3.14159265358979323846
#endif