[TypeScript] Increase TypeScript's type safety with noImplicitAny
TypeScript tries to infer as much about your code as it can.
But sometimes there really is not enough context for it to infer reliably. If it tried to do such inference it would potentially result in more nuisance than help. So instead it infers the type any
. This type can catch people off guard as it provides very little type safety. Fortunately TypeScript has a flag to make it easier to catch such unsafe code at development time.
// tsconfig.json "noImplicitAny": true,
And also the annoying index type error:
const values = Object.keys(foo).map(key => foo[key])
We can set to solve this error message:
"suppressImplicitAnyIndexErrors": true,
[TypeScript] Increase TypeScript's type safety with noImplicitAny的更多相关文章
- [TypeScript] Infer the Return Type of a Generic Function Type Parameter
When working with conditionals types, within the “extends” expression, we can use the “infer” keywor ...
- [TypeScript] Union Types and Type Aliases in TypeScript
Sometimes we want our function arguments to be able to accept more than 1 type; e.g. a string or an ...
- Learining TypeScript (一) TypeScript 简介
Learining TypeScript (一) TypeScript 简介 一.TypeScript出现的背景 2 二.TypeScript的架构 2 1. 设计目标 2 2 ...
- 解决Type safety: The expression of type List needs
解决Type safety: The expression of type List needs unchecked conversion to conform to 在方法前加上这句话就可以了@Su ...
- TypeScript:TypeScript 百科
ylbtech-TypeScript:TypeScript 百科 TypeScript是一种由微软开发的自由和开源的编程语言.它是JavaScript的一个超集,而且本质上向这个语言添加了可选的静态类 ...
- [TypeScript] Use TypeScript’s never Type for Exhaustiveness Checking
TypeScript 2.0 introduced a new primitive type called never, the type of values that never occur. It ...
- 【区分】Typescript 中 interface 和 type
在接触 ts 相关代码的过程中,总能看到 interface 和 type 的身影.只记得,曾经遇到 type 时不懂查阅过,记得他们很像,相同的功能用哪一个都可以实现.但最近总看到他们,就想深入的了 ...
- TypeScript之定义类型 ( type )
键值对结构的对象 export type ValidationErrors = { [key: string]: any }; 联合类型(union type) export type HttpEve ...
- [TypeScript] Generic Functions, class, Type Inference and Generics
Generic Fucntion: For example we have a set of data and an function: interface HasName { name: strin ...
随机推荐
- Android开机自动运行APP——BroadcastReceiver
前言: 有些时候,应用需要在开机时就自动运行,例如某个自动从网上更新内容的后台service.怎样实现开机自动运行的应用?在撰写本文时,联想到高焕堂先生以“Don't call me, I'll ca ...
- 如何从mysql数据库中取到随机的记录
如何从mysql数据库中取到随机的记录 一.总结 一句话总结:用随机函数newID(),select top N * from table_name order by newid() ----N是一个 ...
- !!在JS中代表什么
!!一般用来将后面的表达式转换为布尔型的数据(boolean), javascript约定和c类似,规则为 ·false.undefinded.null.0."" 为 false, ...
- call,apply,求最大最小值,平均数等基础编程知识
CALL/APPLY.一些编程基础以及一些基础知识.正则 call.apply.bind 求数组的最大值和最小值: 数组排序(SORT的原理->localeCompare实现汉字比较),取头取尾 ...
- Javascript和jquery事件--鼠标滚轮事件WheelEvent
<1>js事件 滚轮事件在js中,不同浏览器还是有不同的,介于我只测试谷歌和火狐浏览器的情况,其他浏览器有待自行探索.有三种写法: target.onmousewheel = wheel; ...
- 每天自动备份MySQL数据库的shell脚本
经常备份数据库是一个好习惯,虽然数据库损坏或数据丢失的概率很低,但一旦发生这种事情,后悔是没用的.一般网站或应用的后台都有备份数据库的功能按钮,但需要去手工执行.我们需要一种安全的,每天自动备份的方法 ...
- VS2012载入DLL编译出现试图载入格式不对的程序; 以及执行出现Mixed mode assembly is built against version 'v2.0.50727' of the
VS2012载入DLL编译出现试图载入格式不对的程序:以及执行出现Mixed mode assembly is built against version 'v2.0.50727' of therun ...
- html实现返回上一页的几种方法(javaScript:history.go(-1);)
html实现返回上一页的几种方法(javaScript:history.go(-1);) 一.总结: 1.javaScript:history.go(-1); 二.方法 1.通过超链接返回到上一页 & ...
- v-if和updated钩子结合使用 渲染echart图表
项目需求是这样的,用户可以自定选择echart 曲线图 是横向还是竖向显示.我的做法是 写了一个横向的echart图表,也写了一个竖向的echart图表,然后两者共用存在store里的图表数据,就能实 ...
- Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument
spring 5.+jpa 配置类出错: 十二月 20, 2018 5:53:01 下午 org.springframework.web.servlet.DispatcherServlet initS ...