In computing, memoization or memoisation
is an optimization technique used primarily
to speed up computer programs by storing
the results of expensive function calls and
returning the cached result when the same
inputs occur again.
— wikipedia
Marc Rousavy mrousavy
🐍
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| interface StoryView { | |
| onStoryPressed: <TStory extends UserStory | CategoryStory>( | |
| ...args: TStory extends UserStory ? [stories: Story[], selectedStory: UserStory, user: User] : [stories: Story[], selectedStory: CategoryStory] | |
| ) => void; | |
| } |
mrousavy
/ lottie-react-native+3.5.0.patch
Created
February 8, 2021 14:07
A patch for lottie-react-native so it successfully builds with React Native 0.64
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| diff --git a/node_modules/lottie-react-native/lottie-react-native.podspec b/node_modules/lottie-react-native/lottie-react-native.podspec | |
| index 006d118..63caf4a 100644 | |
| --- a/node_modules/lottie-react-native/lottie-react-native.podspec | |
| +++ b/node_modules/lottie-react-native/lottie-react-native.podspec | |
| @@ -14,7 +14,11 @@ Pod::Spec.new do |s| | |
| s.source = { :git => "https://github.com/react-community/lottie-react-native.git", :tag => "v#{s.version}" } | |
| s.source_files = "src/ios/**/*.{h,m,swift}" | |
| - s.swift_version = "5.0" | |
| - s.dependency 'React' |
mrousavy
/ FastList.tsx
Created
March 17, 2021 12:37
— forked from derekstavis/FastList.tsx
Discord's FastList, but in TypeScript
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| import { forEachObjIndexed } from "ramda"; | |
| import * as React from "react"; | |
| import { | |
| Animated, | |
| ScrollView, | |
| View, | |
| ViewStyle, | |
| LayoutChangeEvent, | |
| NativeScrollEvent, | |
| } from "react-native"; |
mrousavy
/ MEMOIZE.md
Last active
April 18, 2026 14:22
Memoize!!! 💾 - a react (native) performance guide
mrousavy
/ useStyle.ts
Last active
August 1, 2023 13:16
`useStyle` - a typed `useMemo` for styles which also includes style flattening and searching
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| import { DependencyList, useMemo } from "react"; | |
| import { | |
| ImageStyle, | |
| RegisteredStyle, | |
| StyleProp, | |
| StyleSheet, | |
| TextStyle, | |
| ViewStyle, | |
| } from "react-native"; |
mrousavy
/ fastReverse.ts
Last active
January 28, 2022 22:59
A JS function that returns a copy of the input Array in reversed order
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| /** | |
| * Returns a reversed copy of the given Array | |
| */ | |
| export function fastReverse<T>(arr: T[]): T[] { | |
| const result = new Array<T>(arr.length); | |
| for (let i = 0; i < arr.length; i++) { | |
| result[i] = arr[arr.length - 1 - i]; | |
| } | |
| return result; | |
| }; |
mrousavy
/ settings.json
Last active
September 9, 2021 19:59
My VSCode settings + themes + extensions
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| // VSCode Settings (hit `Cmd + ,` to open settings) | |
| { | |
| "editor.smoothScrolling": true, | |
| "editor.fontSize": 16, | |
| "editor.fontFamily": "Fira Mono, Consolas, 'Courier New', monospace", | |
| "editor.wordWrap": "on", | |
| "editor.tabCompletion": "on", | |
| "explorer.openEditors.visible": 0, | |
| "explorer.autoReveal": false, |