(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
| function runInScope(main, sources, context, ...args) { | |
| if(!main) { | |
| throw new Error('A "main" function must be supplied, which will be called in scope and from which a (sinks) object will be returned'); | |
| } | |
| if(!sources) { | |
| throw new Error('A source drivers object must be supplied, to which scoping can be applied'); | |
| } | |
| if(!context) { | |
| throw new Error('A scope context object must be supplied, either as a string, or as an object of key/value pairs'); | |
| } |
Not for everyone. Each programmer has their own appreciation of what is good coding music.
(From most influential to least)
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| function createObservable(subscribe) { | |
| return { | |
| subscribe, | |
| pipe: function(operator) { | |
| return operator(this); | |
| }, | |
| }; | |
| } | |
| const numberObservable = createObservable(function(observer) { |
TypeScript supports Pick to allow you to get a "subset" object type of a given type, but there is no built-in Pick for deeper nested fields.
If you have a function that takes a large object as argument, but you don't use all of its fields, you can use Pick, Pick2, Pick3, etc to narrow down the input type to be only just what you need. This will make it easier to test your function, because when mocking the input object, you don't need to pass all fields of the "large" object.
| # Tweak tap coordinates as you wish | |
| function reactnativedev() { | |
| adb shell input keyevent 82; | |
| sleep 0.1; | |
| adb shell input tap 150 1401; | |
| sleep 0.1; | |
| adb shell input tap 150 1401; | |
| sleep 0.1; | |
| adb shell input text "$1"; | |
| sleep 0.1; |
Suppose I have these components in my project:
class MessageHeader extends React.Component { /* ... */ }
class NiceButton extends React.Component { /* ... */ }
class FridgeContents extends React.Component { /* ... */ }
| define(function(require) { | |
| var React = require('react'); | |
| var paramRegex = /__(\d)+/; | |
| var parser = new DOMParser(); | |
| var errorDoc = parser.parseFromString('INVALID', 'text/xml'); | |
| var errorNs = errorDoc.getElementsByTagName("parsererror")[0].namespaceURI; | |
| // turns the array of string parts into a DOM | |
| // throws if the result is an invalid XML document. |
Use the diff code highlighting tag.
```diff
- foo
+ bar
Example: