Zhentiw - 博客园

2021年2月11日

[Bash] Set Default Arguments with Bash Shell Parameter Expansions

摘要： Shell Parameter Exapnsion In this lesson, we'll see how shell parameter expansions can be used to simply expand a variable's valuable and also provide 阅读全文

posted @ 2021-02-11 21:31 Zhentiw 阅读(92) 评论(0) 推荐(0)

[Bash] Shortcut

摘要： Shortcut For example we have a long command: curl -i http://example.com Ctrl + a Move to the beginning of the line Ctrl + e Move to the end of the lin 阅读全文

posted @ 2021-02-11 20:11 Zhentiw 阅读(100) 评论(0) 推荐(0)

[Bash] Rerun Bash Commands with History Expansions (!! & !$)

摘要： !! & !& History expansions let you interact with bash's history. For example, if you forgot to run a command with sudo, you can sudo !! to rerun the l 阅读全文

posted @ 2021-02-11 20:02 Zhentiw 阅读(434) 评论(0) 推荐(0)

[Bash] Create and Copy Multiple Files with Brace Expansions in Bash

摘要： Copy Brace expansions are commonly used with the cp or mv commands in order to dynamically generate strings. In this lesson, we'll use a brace expansi 阅读全文

posted @ 2021-02-11 19:56 Zhentiw 阅读(111) 评论(0) 推荐(0)

[Bash] Add Executable Files to $PATH with Bash

摘要： $PATH PATH is a global environment variable that represents a list of directories bash looks in for executable files. The executable files for bash co 阅读全文

posted @ 2021-02-11 15:25 Zhentiw 阅读(126) 评论(0) 推荐(0)

2021年2月10日

[Typescript] Create Type From Any Given Data in TypeScript

摘要： TypeScript can infer the type of a variable by looking at the data assigned to it. It also allows you to create a reusable type that it has inferred a 阅读全文

posted @ 2021-02-10 20:11 Zhentiw 阅读(81) 评论(0) 推荐(0)

[Typescript] Ignore Null or Undefined Values with TypeScript Non-Null Assertion Operator

摘要： You can use the non-null assertion operator in TypeScript to take a typed variable and remove the undefined and null types from it. In this lesson, we 阅读全文

posted @ 2021-02-10 17:18 Zhentiw 阅读(116) 评论(0) 推荐(0)

2021年2月9日

[Bash] Chain Commands with Pipes and Redirect Output in Bash

摘要： Pipes (|) are one of the most powerful features in bash and allow you to efficiently chain commands together and send data through it. We'll also look 阅读全文

posted @ 2021-02-09 03:09 Zhentiw 阅读(46) 评论(0) 推荐(0)

[Bash] Use Conditional Statements in Bash

摘要： Knowing how conditionals work in bash open up a world of scripting possibilities. We’ll learn the basic syntax, including if, else, and elif. Then we' 阅读全文

posted @ 2021-02-09 03:04 Zhentiw 阅读(69) 评论(0) 推荐(0)

2021年2月8日

[Bash] Understand Exit Statuses in Bash

摘要： Every command in bash returns an exit status, which is an integer between 0 and 255 that represents whether the command succeeded or failed, and if it 阅读全文

posted @ 2021-02-08 21:39 Zhentiw 阅读(64) 评论(0) 推荐(0)

Answer1215

公告