Comments (3)
lessfish
commented on May 26, 2024
的确，你是对的。这点我也不大理解，源码给了个链接 http://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength，你可以看下有没有用？（我是没大看明白）
from underscore-analysis.
hankxdev
commented on May 26, 2024
underscore 这里不是判断array，更多是对array-like(类数组？)对象的判断。因此，数组的最大长度依然是 Math.pow(2,32)-1, 而这里的 Math.pow(2,53)-1是针对其他array like对象的。另外这里的Math.pow(2,53)-1 严格来说也不是array like 对象的最大长度值，而是一个“最安全整数” （MAX_SAFE_INTEGER ）https://tc39.github.io/ecma262/#sec-number.max_safe_integer
from underscore-analysis.
lessfish
commented on May 26, 2024
@HangYang 棒！感谢指出 到时说到这一部分的时候再重点讲下 再次感谢！
from underscore-analysis.
Related Issues (20)
- JavaScript 数组乱序 HOT 13
- 浅谈 underscore 内部方法 group 的设计原理 HOT 3
- 带注释的源码中var _ = function (obj) {....}中有个疑问 HOT 4
- 关于 bind 你可能需要了解的知识点以及使用场景 HOT 2
- bind 方法的兼容实现 HOT 1
- JavaScript 函数节流和函数去抖应用场景辨析 HOT 17
- underscore 函数去抖的实现 HOT 20
- underscore 函数节流的实现 HOT 8
- 从斐波那契数列求值优化谈 _.memoize 方法 HOT 6
- Function Functions 相关源码拾遗
- 浅谈 Web 中前后端模板引擎的使用 HOT 19
- Underscore _.template 方法使用详解 HOT 3
- Underscore 整体架构浅析 HOT 15
- 源码解读这半年 HOT 20
- 疑问：模块导出中，向后兼容老的require() API HOT 1
- 源码
- 打扰一下，有一个问题想咨询你一下 HOT 9
- 你好请教个问题 HOT 1
- 你好...在谷歌浏览器中运行`Object.prototype.toString().call(abb)`会报错 //var abb = true HOT 2
- 關於underscore源碼中提到了25個扩展方法之疑問？ HOT 2
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from underscore-analysis.