Debouncing is a technique used to ensure that a function doesn't get called too frequently.
It's commonly employed in scenarios where we want to wait for a pause in user input before triggering an action.
For example, in search bars, debounce delays the execution of the search function until the user has finished typing, preventing unnecessary API requests with each keystroke.
| describe('useQueryProductById', () => { | |
| afterEach(() => { | |
| jest.clearAllMocks(); | |
| }); | |
| it('should return a single product', async () => { | |
| const product = { | |
| id: 2, | |
| title: 'Mens Casual Premium Slim Fit T-Shirts ', | |
| price: 22.3, |
| num=10 | |
| # -eq equals | |
| # -ne not equal | |
| # -gt greather than | |
| # -ge greather than or equal | |
| # -lt less than | |
| # -le less than or equal | |
| if [ $num -eq 10] |
| /** | |
| <template> | |
| <div id="foo" @click="handleClick">Yo!</div> | |
| </template> | |
| */ | |
| import { | |
| createElementVNode as _createElementVNode, | |
| openBlock as _openBlock, | |
| createElementBlock as _createElementBlock, |
| // getScope() is a method provided by jscodeshift that can be used to get the Scope object for a given Node. | |
| // A Scope object represents the lexical scope of a node in the abstract syntax tree (AST). | |
| // It contains information about the variables, functions, and other declarations that are in scope at a given point in the code. | |
| // Here's an example of how getScope() can be used: | |
| import { getScope } from 'jscodeshift'; | |
| const source = ` | |
| function foo() { |
| struct Point<T, U> { | |
| x: T, | |
| y: U, | |
| } | |
| impl<T, U> Point<T, U> { | |
| // Methods that use different generic types than their struct’s definition | |
| fn mixup<V, W>(self, other: Point<V, W>) -> Point<T, W> { | |
| Point { | |
| x: self.x, |
| // represents the `possible` absence of a value | |
| enum Option<T> { | |
| Some(T), | |
| None, | |
| } | |
| let email: Option<String> = Some(email_str); | |
| let email: Option<String> = None; | |
| // represents an operation that could have failed |
| function upper(arr: string[]) { | |
| for (let i = 0; i < arr.length; i += 1) { | |
| let str = arr[i]; | |
| console.log(str.upperCase()) | |
| } | |
| } | |
| upper(['foo', 'bar', 'baz']); | |
| // In Typescript when index into an array you get the element type of the array. |
| #!/usr/bin/env sh | |
| # checks to see if running | |
| launchctl list | grep mongo | |
| launchctl unload ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist | |
| launchctl remove homebrew.mxcl.mongodb | |
| pkill -f mongod |
| function replaceRange(str: string, start: number, end: number, substitute: string): string { | |
| const chunk = substitute.repeat(end - start); | |
| return `${str.substring(0, start)${chunk}${str.substring(end)}`; | |
| } |
