Merge branch 'master' into master

.github/workflows/rebase.yml

@@ -1,2 +1,24 @@
-- name: Automatic rebase
-  uses: cirrus-actions/rebase@1.2
+# https://github.com/cirrus-actions/rebase
+on:
+  issue_comment:
+    types: [created]
+
+name: Automatic rebase
+jobs:
+  rebase:
+    name: Rebase
+    if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - name: Automatic Rebase
+      uses: cirrus-actions/rebase@v1.2.0
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+  # https://github.community/t5/GitHub-Actions/Workflow-is-failing-if-no-job-can-be-ran-due-to-condition/m-p/38186#M3250
+  always_job:
+    name: Aways run job
+    runs-on: ubuntu-latest
+    steps:
+      - name: Always run
+        run: echo "This job is used to prevent the workflow to fail when all other jobs are skipped."

.gitpod.yml

@@ -0,0 +1,10 @@
+image: gitpod/workspace-full
+
+github:
+  # Prebuild the docker image for gitpod - https://www.gitpod.io/docs/46_prebuilds/
+  prebuilds:
+    # enable for the master/default branch
+    master: true
+
+tasks:
+  - init: bundle install

.travis.yml

@@ -5,3 +5,10 @@ script:
 - make -B _site
 - if ! make test; then make test-warning; exit 16; fi
 cache: bundler
+notifications:
+  slack:
+    if: branch = master OR branch =~ ^.*slack.*$
+    rooms:
+      - secure: FN4trzyyUdtZ6DXj4G3A7YnhqkPyqi8jN9BIdA6S6D2eJEH1gPbZUfbqAW87LKckKZ9iYB5KDF5IuELhR3vv1DeHRqm3MKRU91JVBDT7EXbF86Z1J/JMJxNOcoWdCilcgpnm9NCkMAPFC9h6Y3txYhaLWLsnDaWlvehBsJg+Ql4=
+    on_success: change
+    on_failure: always

CONTRIBUTING.md

@@ -1,5 +1,19 @@
 # Developer notes
 
+## Gitpod 
+This repository supports contribution using [gitpod](https://gitpod.io) which is online IDE using [Theia](https://github.com/eclipse-theia/theia).
+
+To open-up the environment simple natigate on https://gitpod.io/#https://github.com/rstacruz/cheatsheets
+
+Or using a button:<br>
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/rstacruz/cheatsheets)
+
+### Preview built website
+To preview the website you need to first build it then you can navigate to file that you are trying to contribute and preview directly.
+
+<img src='_docs/images/gitpod_preview_tut.png' width=828 height=459/>
+
+
 ## Starting a local instance
 
 This starts Jekyll and Webpack. This requires recent versions of [Node.js], [Yarn], [Ruby] and [Bundler] installed.

README.md

@@ -17,3 +17,5 @@
 ---
 
 See [CONTRIBUTING.md](CONTRIBUTING.md) for developer notes.
+
+[![Open in Gitpod](https://gitpod.io/button/open-in-gitpod.svg)](https://gitpod.io/#https://github.com/rstacruz/cheatsheets)

_includes/common/moment_format.md

@@ -33,7 +33,7 @@ Used by [Moment.js](http://momentjs.com/docs/#/displaying/) and [date-fns/format
 | `YYYY` | `2013`                  |                  |
 | ---    | ---                     | ---              |
 | `M`    | `1`..`12` _(Jan is 1)_  | **Month**        |
-| `Mo`   | `1st`..`31st`           |                  |
+| `Mo`   | `1st`..`12th`           |                  |
 | `MM`   | `01`..`12` _(Jan is 1)_ |                  |
 | `MMM`  | `Jan`                   |                  |
 | `MMMM` | `January`               |                  |

awscli.md

@@ -37,6 +37,13 @@ brew install awscli
 aws configure
 ```
 
+### Configuration profiles
+
+```
+aws configure --profile project1
+aws configure --profile project2
+```
+
 ## Elastic Beanstalk
 
 ### Configuration

bash.md

@@ -389,18 +389,6 @@ Note that `[[` is actually a command/program that returns either `0` (true) or `
 
 ### Example
 
-```bash
-if ping -c 1 google.com; then
-  echo "It appears you have a working internet connection"
-fi
-```
-
-```bash
-if grep -q 'foo' ~/.bash_history; then
-  echo "You appear to have typed 'foo' in the past"
-fi
-```
-
 ```bash
 # String
 if [[ -z "$string" ]]; then
@@ -547,11 +535,11 @@ set -o nounset    # Exposes unset variables
 ### Glob options
 
 ```bash
-set -o nullglob    # Non-matching globs are removed  ('*.foo' => '')
-set -o failglob    # Non-matching globs throw errors
-set -o nocaseglob  # Case insensitive globs
-set -o globdots    # Wildcards match dotfiles ("*.sh" => ".foo.sh")
-set -o globstar    # Allow ** for recursive matches ('lib/**/*.rb' => 'lib/a/b/c.rb')
+shopt -s nullglob    # Non-matching globs are removed  ('*.foo' => '')
+shopt -s failglob    # Non-matching globs throw errors
+shopt -s nocaseglob  # Case insensitive globs
+shopt -s dotglob     # Wildcards match dotfiles ("*.sh" => ".foo.sh")
+shopt -s globstar    # Allow ** for recursive matches ('lib/**/*.rb' => 'lib/a/b/c.rb')
 ```
 
 Set `GLOBIGNORE` as a colon-separated list of patterns to be removed from glob
@@ -749,6 +737,22 @@ cd -
 pwd # /home/user/foo
 ```
 
+### Check for command's result
+
+```bash
+if ping -c 1 google.com; then
+  echo "It appears you have a working internet connection"
+fi
+```
+
+### Grep check
+
+```bash
+if grep -q 'foo' ~/.bash_history; then
+  echo "You appear to have typed 'foo' in the past"
+fi
+```
+
 ## Also see
 {: .-one-column}
 

capybara.md

@@ -217,7 +217,7 @@ find('#x').fill_in('Street', with: 'Hello')
 ### Scripting
 
 ```ruby
-execute_script('$("input").trigger('change')')
+execute_script('$("input").trigger("change")')
 evaluate_script('window.ga')
 ```
 

css.md

@@ -13,6 +13,7 @@ keywords:
 ---
 
 ## Basics
+
 {: .-three-column}
 
 ### Selectors
@@ -22,10 +23,12 @@ keywords:
   font-weight: bold;
 }
 ```
+
 {: .-setup}
 
 | Selector          | Description  |
-| ----------------- | ----------- |
+| ----------------- | ------------ |
+| `*`               | All elements |
 | `div`             | Element      |
 | `.class`          | Class        |
 | `#id`             | ID           |
@@ -40,6 +43,7 @@ keywords:
 | `.parent > .child`  | Direct descendant |
 | `.child + .sibling` | Adjacent sibling  |
 | `.child ~ .sibling` | Far sibling       |
+| `.class1.class2`    | Have both classes |
 
 ### Attribute selectors
 
@@ -55,7 +59,7 @@ keywords:
 ### Pseudo-classes
 
 | Selector             | Description                                |
-| -------------------- | ------------------------ |
+| -------------------- | ------------------------------------------ |
 | `:target`            | eg, `h2#foo:target`                        |
 | ---                  | ---                                        |
 | `:disabled`          |                                            |
@@ -69,6 +73,11 @@ keywords:
 | `:nth-last-child(2)` |                                            |
 | `:nth-of-type(2)`    |                                            |
 | ---                  | ---                                        |
+| `:checked`           | Checked inputs                             |
+| `:disabled`          | Disabled elements                          |
+| `:default`           | Default element in a group                 |
+| ---                  | ---                                        |
+| `:empty`             | Elements without children                  |
 
 ### Pseudo-class variations
 
@@ -83,9 +92,11 @@ keywords:
 | `:last-child`     |
 | `:nth-child(2)`   |
 | `:only-child`     |
+
 {: .-left-align}
 
 ## Fonts
+
 {: .-left-reference}
 
 ### Properties
@@ -103,15 +114,18 @@ keywords:
 | ---                | ---                                  |
 | `text-align:`      | `left` `right` `center` `justify`    |
 | `text-transform:`  | `capitalize` `uppercase` `lowercase` |
+
 {: .-key-values}
 
 ### Shorthand
+
 {: .-prime}
 
 |         | style    | weight | size (required) |     | line-height | family            |
 | ------- | -------- | ------ | --------------- | --- | ----------- | ----------------- |
 | `font:` | `italic` | `400`  | `14px`          | `/` | `1.5`       | `sans-serif`      |
 |         | style    | weight | size (required) |     | line-height | family (required) |
+
 {: .-css-breakdown}
 
 ### Example
@@ -133,6 +147,7 @@ text-transform: lowercase; /* hello */
 ```
 
 ## Background
+
 {: .-left-reference}
 
 ### Properties
@@ -148,6 +163,7 @@ text-transform: lowercase; /* hello */
 | `background-clip:`       | `border-box` `padding-box` `content-box` |
 | `background-repeat:`     | `no-repeat` `repeat-x` `repeat-y`        |
 | `background-attachment:` | `scroll` `fixed` `local`                 |
+
 {: .-key-values}
 
 ### Shorthand
@@ -157,6 +173,7 @@ text-transform: lowercase; /* hello */
 | `background:` | `#ff0` | `url(bg.jpg)` | `left`    | `top`     | `/` | `100px` `auto` | `no-repeat` | `fixed;`   |
 | `background:` | `#abc` | `url(bg.png)` | `center`  | `center`  | `/` | `cover`        | `repeat-x`  | `local;`   |
 |               | color  | image         | positionX | positionY |     | size           | repeat      | attachment |
+
 {: .-css-breakdown}
 
 ### Multiple backgrounds
@@ -167,6 +184,7 @@ background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
 ```
 
 ## Animation
+
 {: .-left-reference}
 
 ### Properties
@@ -182,6 +200,7 @@ background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
 | `animation-direction:`       | `normal` `reverse` `alternate` `alternate-reverse`       |
 | `animation-fill-mode:`       | `none` `forwards` `backwards` `both` `initial` `inherit` |
 | `animation-play-state:`      | `normal` `reverse` `alternate` `alternate-reverse`       |
+
 {: .-key-values}
 
 ### Shorthand
@@ -190,6 +209,7 @@ background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),
 | ------------ | -------- | -------- | --------------- | ------- | ---------- | ------------------- | --------- | ---------- |
 | `animation:` | `bounce` | `300ms`  | `linear`        | `100ms` | `infinite` | `alternate-reverse` | `both`    | `reverse`  |
 |              | name     | duration | timing-function | delay   | count      | direction           | fill-mode | play-state |
+
 {: .-css-breakdown}
 
 ### Example

docker-compose.md

@@ -54,6 +54,8 @@ docker-compose down
 web:
   # build from Dockerfile
   build: .
+  args:     # Add build arguments
+    APP_HOME: app
 ```
 
 ```yaml
@@ -77,7 +79,7 @@ web:
 ```yaml
   ports:
     - "3000"
-    - "8000:80"  # guest:host
+    - "8000:80"  # host:container
 ```
 
 ```yaml

docker.md

@@ -24,6 +24,11 @@ docker run [options] IMAGE
   # see `docker create` for options
 ```
 
+#### Example
+
+```
+$ docker run -it debian:buster /bin/bash
+```
 Run a command in an `image`.
 
 Manage containers

dockerfile.md

@@ -22,6 +22,11 @@ ENV APP_HOME /myapp
 RUN mkdir $APP_HOME
 ```
 
+```docker
+ARG APP_HOME=""
+RUN mkdir $APP_HOME
+```
+
 ### Initialization
 
 ```docker

enzyme.md

@@ -88,7 +88,7 @@ expect(wrap.state('show')).toEqual(true)
 ```
 
 ```js
-expect('name' in wrap.props()).toEqual(true)
+expect('name' in wrap.props()).toEqual('Moe')
 expect('show' in wrap.state()).toEqual(true)
 ```
 

es6.md

@@ -415,7 +415,7 @@ numbers.map(n => n * 2)
 // Same as: numbers.map(function (n) { return n * 2 })
 numbers.map(n => ({
   result: n * 2
-})
+}))
 // Implicitly returning objects requires parentheses around the object
 ```
 {: data-line="1,4,5,6"}

find.md

@@ -2,6 +2,7 @@
 title: Find
 category: CLI
 layout: 2017/sheet
+updated: 2019-10-01
 ---
 
 ### Usage
@@ -48,6 +49,20 @@ find <path> <conditions> <actions>
 -newerXt "1 hour ago"    # [t]imestamp
 ```
 
+### Access time conditions
+
+```bash
+-atime 0           # Last accessed between now and 24 hours ago
+-atime +0          # Accessed more than 24 hours ago
+-atime 1           # Accessed between 24 and 48 hours ago
+-atime +1          # Accessed more than 48 hours ago
+-atime -1          # Accessed less than 24 hours ago (same a 0)
+-ctime -6h30m      # File status changed within the last 6 hours and 30 minutes
+-mtime +1w         # Last modified more than 1 week ago
+```
+
+These conditions only work in MacOS and BSD-like systems (no GNU/Linux support).
+
 ### Condition flow
 
 ```bash
@@ -73,3 +88,7 @@ find . -name '*.jpg' -exec rm {} \;
 ```bash
 find . -newerBt "24 hours ago"
 ```
+
+```bash
+find . -type f -mtime +29 # find files modified more than 30 days ago
+```

go.md

@@ -422,10 +422,24 @@ func main() {
   fmt.Println("Working...")
 }
 ```
+
 {: data-line="2,3,4"}
 
 Lambdas are better suited for defer blocks.
 
+```go
+func main() {
+  var d = int64(0)
+  defer func(d *int64) {
+    fmt.Printf("& %v Unix Sec\n", *d)
+  }(&d)
+  fmt.Print("Done ")
+  d = time.Now().Unix()
+}
+```
+{: data-line="3,4,5"}
+The defer func uses current value of d, unless we use a pointer to get final value at end of main.
+
 ## Structs
 {: .-three-column}
 

homebrew.md

@@ -35,6 +35,7 @@ category: CLI
 | `brew update`   | Update brew and cask     |
 | `brew list`     | List installed           |
 | `brew outdated` | What's due for upgrades? |
+| `brew doctor`   | Diagnose brew issues     |
 
 ### Brew Cask commands
 
@@ -50,5 +51,4 @@ Cask commands are used for interacting with graphical applications.
 
 * [Homebrew homepage](https://brew.sh/) _brew.sh_
 * [Homebrew docs](https://docs.brew.sh) _docs.brew.sh_
-* [Homebrew Cask](https://caskroom.github.io/) _caskroom.github.io_
 {: .-also-see}

jsdoc.md

@@ -31,7 +31,7 @@ See: <http://usejsdoc.org/index.html>
 | ---                          | ---                   |
 | `@param {string=} n`         | Optional              |
 | `@param {string} [n]`        | Optional              |
-| `@param {(string\|number)} n`| Multiple types        |
+| `@param {(string|number)} n` | Multiple types        |
 | `@param {*} n`               | Any type              |
 | `@param {...string} n`       | Repeatable arguments  |
 | `@param {string} [n="hi"]`   | Optional with default |

lua.md

@@ -61,7 +61,7 @@ title: Lua
 
     if condition then
       print("yes")
-    elsif condition then
+    elseif condition then
       print("maybe")
     else
       print("no")

npm.md

@@ -12,11 +12,13 @@ updated: 2017-10-27
 | ---                               | ---                                                       |
 | `npm i`                           | Alias for `npm install`                                   |
 | `npm install`                     | Install everything in package.json                        |
+| `npm install --production`        | Install everything in package.json, except devDependecies |
 | ---                               | ---                                                       |  
 | `npm install lodash`              | Install a package                                         |
 | `npm install --save-dev lodash`   | Install as devDependency                                  |
 | `npm install --save-exact lodash` | Install with exact                                        |
 
+
 `--save` is the default as of npm@5. Previously, using `npm install` without `--save` doesn't update package.json.
 
 ### Install names
@@ -39,6 +41,15 @@ updated: 2017-10-27
 | `npm i ./archive.tgz`                | Tarball                 |
 | `npm i https://site.com/archive.tgz` | Tarball via HTTP        |
 
+### Listing
+
+| Command                 | Description                                                         |
+| ---                     | ---                                                                 |
+| `npm list`              | Lists the installed versions of all dependencies in this software   | 
+| `npm list -g --depth 0` | Lists the installed versions of all globally installed packages     | 
+| `npm view`              | Lists the latest versions of all dependencies in this software      | 
+| `npm outdated`          | Lists only the dependencies in this software which are outdated     |
+
 ### Updating
 
 | Command             | Description                |

python.md

@@ -58,6 +58,7 @@ category: Python
     string.replace("-", " ")
     ",".join(list)
     "hi {0}".format('j')
+    "hi {name}" # same as "hi {}".format('name')
     str.find(",")
     str.index(",")   # same, but raises IndexError
     str.count(",")
@@ -101,3 +102,44 @@ category: Python
     expr.match(...)
     expr.sub(...)
 
+## File manipulation
+    
+### Reading
+
+```py
+file = open("hello.txt", "r") # open in read mode 'r'
+file.close() 
+
+print(file.read())  # read the file 
+print fh.readline() # Reading line by line
+```
+
+### Writing (overwrite)
+
+```py
+file = open("hello.txt", "w") # open in write mode 'w'
+write("Hello World")
+
+text_lines = ["First line", "Second line", "Last line"] 
+file.writelines(text_lines)
+
+file.close()
+```
+
+### Writing (append)
+
+```py
+file = open("Hello.txt", "a") # open in append mode
+write("Hello World again")  
+file.close()
+```
+
+### Context manager
+
+```py
+with open("welcome.txt", "r") as file:
+    # 'file' refers directly to the "welcome.txt"
+   data = file.read()
+```
+
+It closes the file automatically, no need for `file.close()`.

rails-models.md

@@ -247,11 +247,11 @@ Associations
 belongs_to :parent, :foreign_key => 'parent_id' class_name: 'Folder'
 has_many :folders, :foreign_key => 'parent_id', class_name: 'Folder'
 
-has_many :comments,    :order      => "posted_on"
+has_many :comments,                -> { order('posted_on DESC') }
 has_many :comments,    :include    => :author
 has_many :people,      :class_name => "Person"
 has_many :people,      :conditions => "deleted = 0"
-has_many :tracks,      :order      => "position"
+has_many :tracks,                  -> { order(:position) }
 has_many :comments,    :dependent  => :nullify
 has_many :comments,    :dependent  => :destroy
 has_many :tags,        :as         => :taggable

react.md

@@ -312,6 +312,151 @@ Called when parents change properties and `.setState()`. These are not called fo
 
 See: [Component specs](http://facebook.github.io/react/docs/component-specs.html#updating-componentwillreceiveprops)
 
+Hooks (New)
+-----------
+{: .-two-column}
+
+### State Hook
+
+```jsx
+import React, { useState } from 'react';
+
+function Example() {
+  // Declare a new state variable, which we'll call "count"
+  const [count, setCount] = useState(0);
+
+  return (
+    <div>
+      <p>You clicked {count} times</p>
+      <button onClick={() => setCount(count + 1)}>
+        Click me
+      </button>
+    </div>
+  );
+}
+```
+{: data-line="5,10"}
+
+Hooks are a new addition in React 16.8.
+
+See: [Hooks at a Glance](https://reactjs.org/docs/hooks-overview.html)
+
+### Declaring multiple state variables
+
+```jsx
+function ExampleWithManyStates() {
+  // Declare multiple state variables!
+  const [age, setAge] = useState(42);
+  const [fruit, setFruit] = useState('banana');
+  const [todos, setTodos] = useState([{ text: 'Learn Hooks' }]);
+  // ...
+}
+```
+
+### Effect hook
+
+```jsx
+import React, { useState, useEffect } from 'react';
+
+function Example() {
+  const [count, setCount] = useState(0);
+
+  // Similar to componentDidMount and componentDidUpdate:
+  useEffect(() => {
+    // Update the document title using the browser API
+    document.title = `You clicked ${count} times`;
+  });
+
+  return (
+    <div>
+      <p>You clicked {count} times</p>
+      <button onClick={() => setCount(count + 1)}>
+        Click me
+      </button>
+    </div>
+  );
+}
+```
+{: data-line="6,7,8,9,10"}
+
+If you’re familiar with React class lifecycle methods, you can think of `useEffect` Hook as `componentDidMount`, `componentDidUpdate`, and `componentWillUnmount` combined. 
+
+By default, React runs the effects after every render — including the first render.
+
+### Building your own hooks
+
+#### Define FriendStatus
+```jsx
+import React, { useState, useEffect } from 'react';
+
+function FriendStatus(props) {
+  const [isOnline, setIsOnline] = useState(null);
+
+  useEffect(() => {
+    function handleStatusChange(status) {
+      setIsOnline(status.isOnline);
+    }
+
+    ChatAPI.subscribeToFriendStatus(props.friend.id, handleStatusChange);
+    return () => {
+      ChatAPI.unsubscribeFromFriendStatus(props.friend.id, handleStatusChange);
+    };
+  });
+
+  if (isOnline === null) {
+    return 'Loading...';
+  }
+  return isOnline ? 'Online' : 'Offline';
+}
+```
+{: data-line="11,12,13,14"}
+
+Effects may also optionally specify how to “clean up” after them by returning a function. 
+
+#### Use FriendStatus
+
+```jsx
+function FriendStatus(props) {
+  const isOnline = useFriendStatus(props.friend.id);
+
+  if (isOnline === null) {
+    return 'Loading...';
+  }
+  return isOnline ? 'Online' : 'Offline';
+}
+```
+{: data-line="2"}
+
+See: [Building Your Own Hooks](https://reactjs.org/docs/hooks-custom.html)
+
+### Hooks API Reference
+
+Also see: [Hooks FAQ](https://reactjs.org/docs/hooks-faq.html)
+
+#### Basic Hooks
+
+| Hook                         | Description                               |
+| ---------------------------- | ----------------------------------------- |
+| `useState`_(initialState)_   |                                           |
+| `useEffect`_(() => { ... })_ |                                           |
+| `useContext`_(MyContext)_    | value returned from `React.createContext` |
+
+Full details: [Basic Hooks](https://reactjs.org/docs/hooks-reference.html#basic-hooks)
+
+#### Additional Hooks
+
+| Hook                                         | Description                                                                 |
+| -------------------------------------------- | ---------------------------------------------------------------------------- |
+| `useReducer`_(reducer, initialArg, init)_    |                                                                              |
+| `useCallback`_(() => { ... })_               |                                                                              |
+| `useMemo`_(() => { ... })_                   |                                                                              |
+| `useRef`_(initialValue)_                     |                                                                              |
+| `useImperativeHandle`_(ref, () => { ... })_  |                                                                              |
+| `useLayoutEffect`                            | identical to `useEffect`, but it fires synchronously after all DOM mutations |
+| `useDebugValue`_(value)_                     | display a label for custom hooks in React DevTools                           |
+
+Full details: [Additional Hooks](https://reactjs.org/docs/hooks-reference.html#additional-hooks)
+
 DOM nodes
 ---------
 {: .-two-column}

regexp.md

@@ -6,17 +6,19 @@ weight: -1
 authors:
   - github: rizqyhi
   - github: kolapsys
-updated: 2019-10-24
+  - github: samtrion
+updated: 2019-11-14
 description: |
   Basic cheatsheets for regular expression
 ---
 
+## RegExp
 {: .-three-column}
 
 ### Character classes
 
 | Pattern  | Description                          |
-| ------- | ------------------------------ |
+| -------- | ------------------------------------ |
 | `.`      | Any character, except newline        |
 | `\w`     | Word                                 |
 | `\d`     | Digit                                |
@@ -27,6 +29,7 @@ description: |
 | `[abc]`  | Any of a, b, or c                    |
 | `[a-e]`  | Characters between `a` and `e`       |
 | `[1-9]`  | Digit between `1` and `9`            |
+| `[^abc]` | Any character except `a`, `b` or `c` |
 
 ### Anchors
 
@@ -55,8 +58,11 @@ description: |
 ### Groups
 
 | Pattern   | Description                    |
-| ------- | ------------- |
+| --------- | ------------------------------ |
 | `(abc)`   | Capture group                  |
+| `(a|b)`   | Match `a` or `b`               |
+| `(?:abc)` | Match `abc`, but don't capture |
+
 
 ### Quantifiers
 

stencil.md

@@ -125,7 +125,7 @@ this.options = { ...this.options, show: true }
 
 Mutable operations such as `push()` won't work. You'll need to assign a new copy.
 
-See: [Updating arrays](https://stenciljs.com/docs/handling-arrays)
+See: [Updating arrays](https://stenciljs.com/docs/reactive-data/#updating-arrays)
 
 ## Slots
 

superagent.md

@@ -1,35 +1,61 @@
 ---
 title: Superagent
 category: JavaScript libraries
+updated: 2018-04-21
+prism_languages: [javascript]
+tags:
+  - WIP
 ---
 
-### Result
+### Response object
+```javascript
+  res: {
+    // The HTTP Status Code (see: httpstatuses.com for definitions on HTTP status codes)
+    status: 202,
+    // True when res.status is 2xx
+    ok: true,
+    // True when res.status is 4xx or 5xx
+    error: false,
+    // True when res.status is 4xx
+    clientError: false,
+    // True when res.status is 5xx
+    serverError: false,
 
-    result == {
-      ok: true
-      error: false
+    // True when res.status == 202
+    accepted: true,
+    // True when res.status == 204 || res.status == 1223 
+    noContent: false,
+    // True when res.status == 400
+    badRequest: false,
+    // True when res.status == 401
+    unauthorized: false,
+    // True when res.status == 406
+    notAcceptable: false,
+    // True when res.status == 404
+    notFound: false,
+    // True when res.status == 403
+    forbidden: false,
 
-      // Response
-      body: null
-      text: "<!doctype html>..."
+    // Unparsed response text
+    text: '{"user":{"username":"JohnDoe","role":"admin"}}'
 
-      // Headers
-      status: 200
-      type: "text/html"
-      charset: "UTF-8"
+    // Parsed response text (only if response is 'application/json' or 'application/x-www-form-urlencoded'
+    body: {
+      // Example of parsed object from res.text
+      user: {
+        username: 'JohnDoe',
+        role: 'admin'
+      }
+    }
+
+    // The content-type (parsed from headers)
+    type: 'application/json'
+    // The charset (parsed from headers)
+    charset: 'UTF-8'
+    // Header object with each header field as a property
     headers: {
-        'cache-control': 'public',
-        'content-type': 'text/html; charset=UTF-8'
+      'content-type': 'application/json; charset=UTF-8',
+      ...
     }
-
-      accepted: false
-
-      // specific errors
-      badRequest: false
-      clientError: false
-      forbidden: false
-      notFound: false
-      noContent: false
-      notAcceptable: false
-      unauthorized: false
 }
+```

tmux.md

@@ -44,8 +44,8 @@ category: CLI
 
 ### Panes
 
-    C-b v       # vert
-    C-b n       # horiz
+    C-b %       # vert
+    C-b "       # horiz
     C-b hkjl    # navigation
     C-b HJKL    # resize
     C-b o       # next window

vim.md

@@ -78,6 +78,7 @@ Getting started
 | Shortcut | Description              |
 | ---      | ---                      |
 | `zz`     | Center this line         |
+| `zt`     | Top this line            |
 | `H`      | Move to top of screen    |
 | `M`      | Move to middle of screen |
 | `L`      | Move to bottom of screen |

vue.md

@@ -1,6 +1,11 @@
 ---
-title: Vue
-category: JavaScript libraries
+title: Vue.js
+category: JavaScript
+layout: 2017/sheet
+updated: 2019-11-22
+weight: -10
+intro: |
+  [Vue.js](https://vuejs.org/) is an open-source Model–view–viewmodel JavaScript framework for building user interfaces and single-page applications.
 ---
 
 {% raw %}

xpath.md

@@ -18,7 +18,7 @@ Test queries in the Xpath test bed:<br>
 ### Browser console
 
 ```js
-$x('//div')
+$x("//div")
 ```
 
 Works in Firefox and Chrome.