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@paulirish
paulirish / what-forces-layout.md
Last active July 10, 2025 08:36
What forces layout/reflow. The comprehensive list.

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics
  • elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
@squarism
squarism / iterm2.md
Last active July 5, 2025 15:32
An iTerm2 Cheatsheet

Tabs and Windows

Function Shortcut
New Tab + T
Close Tab or Window + W (same as many mac apps)
Go to Tab + Number Key (ie: ⌘2 is 2nd tab)
Go to Split Pane by Direction + Option + Arrow Key
Cycle iTerm Windows + backtick (true of all mac apps and works with desktops/mission control)
@OlegIlyenko
OlegIlyenko / Event-stream based GraphQL subscriptions.md
Last active July 5, 2025 14:15
Event-stream based GraphQL subscriptions for real-time updates

In this gist I would like to describe an idea for GraphQL subscriptions. It was inspired by conversations about subscriptions in the GraphQL slack channel and different GH issues, like #89 and #411.

Conceptual Model

At the moment GraphQL allows 2 types of queries:

  • query
  • mutation

Reference implementation also adds the third type: subscription. It does not have any semantics yet, so here I would like to propose one possible semantics interpretation and the reasoning behind it.

Byobu is a suite of enhancements to tmux, as a command line
tool providing live system status, dynamic window management,
and some convenient keybindings:
F1 * Used by X11 *
Shift-F1 Display this help
F2 Create a new window
Shift-F2 Create a horizontal split
Ctrl-F2 Create a vertical split
Ctrl-Shift-F2 Create a new session
@wpietri
wpietri / rover.py
Created December 7, 2015 17:11
Rover kata example for hiring
class Rover:
pass
@simonw
simonw / mixins_demo.py
Created December 28, 2015 22:41
An illustration of how Python multiple inheritance / mixins work. I always forget the order in which super() calls other methods.
class CleanMixin(object):
def clean(self):
print " clean() in CleanMixin"
super(CleanMixin, self).clean()
class BaseClean(object):
def clean(self):
print " clean() in BaseClean"

Important: At the time of writing (2019-11-11) Immutable.js is effectively abandonware, so I can no longer recommend anyone to follow the advice given here. I'll leave the article here for posterity, since it's still getting some traffic.

Understanding Immutable.Record

Functional programming principles and with it immutable data are changing the way we write frontend applications. If the recent de-facto frontend stack of React and Redux feels like it goes perfectly together with immutable data, that's because it's specifically designed for that.

There's several interesting implementations of immutable data for JavaScript, but here I'll be focusing on Facebook's own Immutable.js, and specifically on one of i

@runekaagaard
runekaagaard / list_all_model_signals.py
Last active July 4, 2022 15:41 — forked from voldmar/signals.py
List all signals by model and signal type. Tested with Django 1.7.
# coding:utf-8
import gc
import inspect
import ctypes
from collections import defaultdict
from django.core.management.base import BaseCommand
from django.db.models.signals import *
@kapilt
kapilt / developer-diff-notes.md
Last active December 6, 2016 19:15
exploring diffs

Three python diff libraries were evaluated for comparing resource revisions.

  • jsonpatch
  • dictdiffer
  • DeepDiff

Additional a consideration of rolling our own thats specific to custodian's needs.

jsonpatch

@LeCoupa
LeCoupa / redis_cheatsheet.bash
Last active April 17, 2025 11:09
Redis Cheatsheet - Basic Commands You Must Know --> UPDATED VERSION --> https://github.com/LeCoupa/awesome-cheatsheets
# Redis Cheatsheet
# All the commands you need to know
redis-server /path/redis.conf # start redis with the related configuration file
redis-cli # opens a redis prompt
# Strings.