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1. spring.ts spring.ts

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   export interface IStepOptions {

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     secondsPerFrame?: number;

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     v: number;

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     x: number;

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     destX: number;

2. pull-to-refresh.tsx pull-to-refresh.tsx

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   // https://codesandbox.io/s/pull-to-refresh-ljetin

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   import React from "react";

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   import ReactDOM from "react-dom";

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   import { Motion, spring, presets } from "react-motion";

3. simple-diff-algorithms.ts simple-diff-algorithms.ts

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   function getSiblingHost(cCs: Array<Component>, index = 0): Node | void {

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     for (let j = index + 1; j < cCs.length; j++) {

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       const dom = cCs[j].hostElement;

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       if (dom) {

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         return dom;

4. cubic-bezier.ts cubic-bezier.ts

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   function calcBezier(t: number, p1: number, p2: number): number {

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     return (((1 + 3 * p1 - 3 * p2) * t + (-6 * p1 + 3 * p2)) * t + 3 * p1) * t;

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   }

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   const PRECISION = 0.0000001;

5. shared pointer implementation for ed... shared pointer implementation for education purpose.

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   #include <iostream>

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   template <typename T>

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   class shared_ptr

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   {