aneurysmjs

// getScope() is a method provided by jscodeshift that can be used to get the Scope object for a given Node. 
// A Scope object represents the lexical scope of a node in the abstract syntax tree (AST). 
// It contains information about the variables, functions, and other declarations that are in scope at a given point in the code.

// Here's an example of how getScope() can be used:

import { getScope } from 'jscodeshift';

const source = `
  function foo() {

aneurysmjs

struct Point<T, U> {
    x: T,
    y: U,
}

impl<T, U> Point<T, U> {
    //  Methods that use different generic types than their struct’s definition
    fn mixup<V, W>(self, other: Point<V, W>) -> Point<T, W> {
        Point {
            x: self.x,

aneurysmjs

// represents the `possible` absence of a value
enum Option<T> {
  Some(T),
  None,
}
  
let email: Option<String> = Some(email_str);
let email: Option<String> = None;

// representsan operation that could have failed

aneurysmjs

function upper(arr: string[]) {
  for (let i = 0; i < arr.length; i += 1) {
    let str = arr[i];
    console.log(str.upperCase())
  }
}

upper(['foo', 'bar', 'baz']);

// In Typescript when index into an array you get the element type of the array.

aneurysmjs

#!/usr/bin/env sh

# checks to see if running 
launchctl list | grep mongo
 
launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
launchctl remove homebrew.mxcl.mongodb

pkill -f mongod

aneurysmjs

function replaceRange(str: string, start: number, end: number, substitute: string): string {
  const chunk = substitute.repeat(end - start);
	
  return `${str.substring(0, start)${chunk}${str.substring(end)}`;
}

aneurysmjs

/**
 * match first character after white space
 */
const firstAtWhiteSpace = /(^|\s)[a-z]/g;

aneurysmjs

// in this case the state is each individual product
const product = (state, action) => {
  switch (action.type) {
    case 'CREATE_PRODUCT':
      return {
        id: action.id,
        name: action.name,
        price: action.price,
      };
    case 'EDIT_PRODUCT':

aneurysmjs

<!-- 
  even though the "blue" comes later in the list of classes,
  but CSS rules of precedence actually depends of the order of
  classes in the stylesheet
-->
<span class="red blue">
  so I'm red
</span>

aneurysmjs

/**
 * ignore files temporarily
 */
start ignoring changes to a file:
git update-index --assume-unchanged path/to/file

keep tracking again:
git update-index --no-assume-unchanged path/to/file

// @see https://stackoverflow.com/questions/2363197/can-i-get-a-list-of-files-marked-assume-unchanged