pesterhazy

Offline-first browser apps and multiple tabs

For offline-first operation, browser apps cache data in an IndexedDb database. When the user makes a change while offline, they persist the change optimistically. When connectivity is restored, changes are synced to the server.

This pattern is well established today. However, given the possibility of opening the app in multiple tabs at the same time, we seem to be faced with a dilemma:

• We allow users to use the app and to make changes in multiple tabs at the same time. But then two "threads" are writing to the same shared resource at the same time. Co-ordinating writes seems to be difficult.

  To make things worse, while the localStorage API allows you to register a callback that fires whenever an item is changed outside the current tab, the IndexedDb API doesn't, at least not in a widely-available way.

mohanpedala

Table of Contents

• set -e, -u, -x, -o pipefail
• set -e
• set -x
• set -u
• set -o pipefail
• Setting IFS
• Original Reference

set -e, -u, -x, -o pipefail

bradtraversy

Docker Commands, Help & Tips

Show commands & management commands

$ docker

Docker version info

rene-d

# SGR color constants
# rene-d 2018

class Colors:
    """ ANSI color codes """
    BLACK = "\033[0;30m"
    RED = "\033[0;31m"
    GREEN = "\033[0;32m"
    BROWN = "\033[0;33m"
    BLUE = "\033[0;34m"

lucidBrot

// as one-liner for bookmarklet
javascript:;(function(){var images=[].slice.call(document.querySelectorAll('img'));try{images.forEach(function(img){downloadResource(img.src)})}catch(e){alert("Download failed.");console.log('Download failed.',e)}function forceDownload(blob,filename){var a=document.createElement('a');a.download=filename;a.href=blob;a.click()}function downloadResource(url,filename){if(!filename)filename=url.split('\\').pop().split('/').pop();fetch(url,{headers:new Headers({'Origin':location.origin}),mode:'cors'}).then(response=>response.blob()).then(blob=>{let blobUrl=window.URL.createObjectURL(blob);forceDownload(blobUrl,filename)}).catch(e=>console.error(e))}}).call(window);

sloanlance

jq: JSONL → TSV conversion

What is TSV?

TSV means "tab-separated values". I prefer this format over CSV ("comma-separated values") because it doesn't require as much quoting. Many programs that can use CSV formatted data can also use TSV, although they may need to be explicitly told of the different format if it's not detected automatically.

However, in any of the jq scripts below, "@tsv" can usually be replaced with "@csv" to get CSV output instead.

Nanquitas

###############################
#        Action Replay        #
#   Code Types supported by   #
#      CTRPluginFramework     #
#          v0.5.0             #
###############################

==============
INFO
==============

VirajKanse

Install Termux App.
type "apt update"
Then We have to install a text editor to write our code so type "apt install vim" for vim text editor
or u can also use nano text editor for nano type "apt install nano"
Now Clang Installation type "apt install clang" and wait for download completes.
now to create a file simply type vim filename.c or .cpp or nano filename.c or cpp 
then u will able to write ur code . 
write.....to save ur code simply press esc then type ":wq"
now code is ready to compile 
type "clang filename.c -o filename"

johnloy

Electron apps

• Marp: Markdown presentation ecosystem.

• muryoimpl/slippr: markdown presentation app by Electron

• joe-re/cafe-pitch Markdown-driven presentation tool built on Electron.

Slide deck frameworks supporting Markdown source

kannankumar

How To - Upload and add Images to markdown files in Gist

Markdown files allow embedding images in it. However it requires the image to be hosted at some location and we can add the url of the image to embed it.

Example: ![Alternate image text](https://someurl/imagelocation/image.png)

We can use services like imgur or other services to host the images and use the hosted URL.