https://github.com/easycz/til
Today I Learned...
https://github.com/easycz/til
Last synced: about 1 year ago
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Today I Learned...
- Host: GitHub
- URL: https://github.com/easycz/til
- Owner: easyCZ
- Created: 2016-03-23T17:59:46.000Z (about 10 years ago)
- Default Branch: master
- Last Pushed: 2017-01-18T23:54:36.000Z (over 9 years ago)
- Last Synced: 2025-01-25T04:45:11.585Z (over 1 year ago)
- Homepage:
- Size: 28.3 KB
- Stars: 3
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
Today I learned...
======
#### 2017-01-18 To run tests in Rust in `tests` directory which use `src` files, you need to reference the package name
* `src/lib.rs`
```
pub fn hello() {
println!("Hello, world!");
}
```
* `tests/my_test.rs`
```
extern crate hello_world;
#[test]
fn test_prints_hello() { assert_eq!("Hello, world!", hello_world::hello()); }
```
where `hello_world` is the project/package name
#### 2017-01-16 Use CMD-Shift-C to open Element selector in Chrome
#### 2017-01-15 Ownership in Rust through a intro_rust() tutorial
[intro_rust()](http://intorust.com/)
#### 2017-01-14 Learned about the Vinyl industry
#### 2017-01-13 Define a Rust package with `mod`
```
[pub] mod my {
// Items in modules default to private visibility.
fn private_function() {
println!("called `my::private_function()`");
}
// Use the `pub` modifier to override default visibility.
pub fn function() {
println!("called `my::function()`");
}
}
```
#### 2017-01-12 The first byte of a PNG document is the signature
The PNG singature is composed of the following ASCII values:
* 137 A byte with its most significant bit set (8-bit character)
* 80 P
* 78 N
* 71 G
* 13 Carriage-return (CR) character, a.k.a. CTRL-M or ^M
* 10 Line-feed (LF) character, a.k.a. CTRL-J or ^J
* 26 CTRL-Z or ^Z
* 10 Line-feed (LF) character, a.k.a. CTRL-J or ^J
#### 2017-01-11 It is possible to pack arbitrary content into a PNG file
It is then possible to pack HTML/CSS/JS into the content and serve it as ana image. [Arbitrary PNG content](https://news.ycombinator.com/item?id=9319526)
#### 2017-01-10 Add 2^5 (32) to any ASCII uppercase character to obtain the lowercase
Similarly, substract 32 from any ASCII lowercase character to obtain the uppercase.
```
a = chr(ord('A') + 32)
A = chr(ord('a') - 32)
```
#### 2016-11-23 Configure [httpie](https://httpie.org/) timeout with a default config
```
~/.httpie/config.json
```
```
"default_options": ["--style=fruity", "--body"]
```
#### 2016-11-22 AWS Lambda Environment Variables
It is now possible to specify environment variables in AWS Lambda
#### 2016-11-21 Mockito Argument Captor with Generics
```
@Captor
private ArgumentCaptor> accountCaptor;
@Test
public void argumentCaptor() {
when(service.disableAccount(account.capture()).thenReturn(...);
Pair accountArgument = accountCaptor.get();
...
}
```
#### 2016-11-18 Pipe input into a `curl` command
```
echo "payload" | curl -d @-
```
#### 2016-05-12 Easy git directory publish with [git-directory-deploy](https://github.com/X1011/git-directory-deploy)
#### 2016-05-10 Discovered [Elm Lang](http://elm-lang.org/)
#### 2016-05-09 MPI, pthreads and Julia
#### 2016-05-08 Linux insides
[GitBook](https://www.gitbook.com/book/0xax/linux-insides/details)
#### 2016-05-02 Use git-flow
[CheatSheet](https://gist.github.com/kristopherjohnson/8979538)
#### 2016-04-26 Use async-await in React Native Redux Action Creators for more win
```javascript
async function makeAction() : Promise {
const data = await Async.get(...);
return { type: 'ACTION_TYPE', data };
}
```
#### 2016-04-25 Close the current HTML tag (including ReactJS) in Sublime Text
```
CMD+ALT+.
```
#### 2016-04-24 Select All Inside Current Scope in Sublime Text
```
CTRL+SHIFT+M
```
#### 2016-04-23 List Globally Installed NPM packages
```bash
npm list -g --depth=0
```
#### 2016-04-22 Spin Infinitely in React Native
```javascript
class SpinningSquare extends React.Component {
state = {
rotation: new Animated.Value(0)
}
/* Duration drives the speed of each rotation */
componentDidMount() {
const timingConfig = { toValue: 1, duration: 1000, easing: Easing.linear }
this.animation = Animated.timing(this.state.rotation, timingConfig)
this._animate()
}
_animate = () => {
this.state.rotation.setValue(0); // Needs to be reset after a full rotation
this.animation.start(this._animate); // self as callback onFinished
}
render() {
const rotate = this.state.rotation.interpolate({ inputRange: [0, 1], outputRange: ['0deg', '360deg'] })
return (
)
}
}
```
#### 2016-04-13
Learned some vim commands through `vimtutor`
#### 2016-04-12
Learned how to use iOS Facebook login with the Facebook SDK
#### 2016-04-11
How to use Firebase as a messagining queue with [firebase-queue](https://github.com/firebase/firebase-queue)
#### 2016-04-09
Loading the BIOS after the power button is pressed on a pc
#### 2016-04-02
How to use FP with lodash
#### 2016-03-30
Learned how exhausting finishing a dissertation is :)
#### 2016-03-28
How objects and inheratiance works in Go from [build-web-applications-with-golang](https://www.gitbook.com/book/astaxie/build-web-application-with-golang/details)
#### 2016-03-26
Memcached performance drastically increases with thread pinning and IRQ pinning.
#### 2016-03-25
Investigated how IRQ affinity works. Learned you can obtian the number of interrupts executed on a given CPU core through `cat /proc/interrupt` as well as how setting IRQ Affinity to a given CPU/CPUs works. We can provide the list of values in `/proc/irq//smp_affinity_list`.
#### 2016-03-24
Learned about functors, Maybe, Either and IO from [mostly-adequate-guide](https://drboolean.gitbooks.io/mostly-adequate-guide/content/)
#### 2016-03-23
Functional programming with JavaScript through the awesome [mostly-adequate-guide](https://drboolean.gitbooks.io/mostly-adequate-guide/content/).