This simple script will take a picture of a whiteboard and use parts of the ImageMagick library with sane defaults to clean it up tremendously.
The script is here:
#!/bin/bash
convert "$1" -morphology Convolve DoG:15,100,0 -negate -normalize -blur 0x1 -channel RBG -level 60%,91%,0.1 "$2"
| # username = "my_username" | |
| # pwd = "my_password" | |
| # target_path = "my_target_path" | |
| # saving auth cookie | |
| system %Q{wget --save-cookies /tmp/cookie.txt --keep-session-cookies --post-data "username=#{username}&password=#{pwd}" -O - \ | |
| https://rubytapas.dpdcart.com/subscriber/login?__dpd_cart=d08391e6-5fe2-4400-8b27-2dc17b413027} | |
| (25..600).each do |i| |
| #!/bin/sh | |
| # Github -> Bitbucket | |
| # - Save this in /usr/local/bin as github-to-bitbucket | |
| # - Then: | |
| # cd /usr/local/bin | |
| # chmod u+x github-to-bitbucket | |
| # - Then restart your terminal | |
| # - You should now have a github-to-bitbucket command |
| // This is in response to https://gist.github.com/Peeja/5284697. | |
| // Peeja wanted to know how to convert some callback-based code to functional | |
| // style using promises. | |
| var Promise = require('rsvp').Promise; | |
| var ids = [1,2,3,4,5,6]; | |
| // If this were synchronous, we'd simply write: |
| <!DOCTYPE html> | |
| <meta charset=utf-8 /> | |
| <title>Defining JavaScript functions, the ES6 way</title> | |
| <h1>Defining JavaScript functions, the ES6 way</h1> | |
| <em>Use Firefox 22 (Firefox Nightly)</em> | |
| <script> |
| // `Object.make(..)` is a helper/wrapper for `Object.create(..)`. Both create a new | |
| // object, and optionally link that new object's `[[Prototype]]` chain to another object. | |
| // | |
| // But `Object.make(..)` makes sure the new object always has a `__proto__` property | |
| // (even a null one) and delegation to a `isPrototypeOf(..)` method, both of which are | |
| // missing from the bare object (aka "Dictionary") created by `Object.create(null)`. | |
| // | |
| // `isPrototypeOf()` is put on a extra object that your created object can delegate to, | |
| // if any only if you create an empty object (by not passing a `linkTo`) that otherwise | |
| // wouldn't have access to `isPrototypeOf()`. |
| #!/bin/bash | |
| # Functions ============================================== | |
| # return 1 if global command line program installed, else 0 | |
| # example | |
| # echo "node: $(program_is_installed node)" | |
| function program_is_installed { | |
| # set to 1 initially | |
| local return_=1 |
List moved
Please use https://github.com/bf4/learning to fork and pull changes.
I’ve been having a play around with Mutation Observers this morning, trying to work out when notifications happen and what happens when removing a node that was just added.
If you’re unfamiliar with Mutation Observers, they let you receive notifications when an element, or elements, have been modified in a particular way (here's an intro to Mutation Observers from Mozilla).
Consider this:
Authored by Peter Rybin , Chrome DevTools team
In this short guide we'll review some new Chrome DevTools features for "function scope" and "internal properties" by exploring some base JavaScript language concepts.
Let's start with closures – one of the most famous things in JS. A closure is a function, that uses variables from outside. See an example:
