Typescript – What TypeScript version is Visual Studio Code using? How to update it

typescriptvisual-studio-code

How can I tell what version of TypeScript is being used in Visual Studio Code? In particular, I had been using TypeScript 1.8.10 and VSCode 1.4.0. I first updated VSCode to the latest version, which was 1.5.3. But checking from the command line, I saw that my TypeScript version was still 1.8.10. So I updated TypeScript from the command line, and it is now 2.0.3 .

Is there a way to tell for sure whether Visual Studio Code is using version 2.0.3?

Is there a method for updating Visual Studio Code that will automatically update TypeScript to the latest released version, or does the TypeScript update have to be done independently?

Best Answer

Can TypeScript be updated automatically?

VS Code ships with a recent stable version of TypeScript.

– from VS Code docs

This means there's no way to automatically upgrade the TypeScript version used by VS Code. You can however override the TypeScript version VS Code uses by modifying either the user settings or the workspace settings.

What TypeScript version is VS Code using?

When you open a TypeScript file, VS Code should display the TypeScript version in the status bar at the bottom right of the screen:

Changing the global TypeScript version

Install the desired TypeScript version globally, for example npm install -g typescript@2.0.5
Open VS Code User Settings (F1 > Open User Settings)
Update/Insert "typescript.tsdk": "{your_global_npm_path}/typescript/lib" you can find out {your_global_npm_path} by typing npm root -g

Now all of the projects you open with VS Code will use this TypeScript version, unless of course there is a workspace setting that overrides this.

Changing the local TypeScript version

Open the project in VS Code
Install the desired TypeScript version locally, for example npm install --save-dev typescript@2.0.5

The --save-dev will update your project's package.json, adding the TypeScript version you installed as a devDependency.
Open VS Code Workspace Settings (F1 > Open Workspace Settings)
Update/Insert "typescript.tsdk": "./node_modules/typescript/lib"

Now only the project you installed this TypeScript version in will use that TypeScript version, the global installation will be ignored by VS Code in this project.
Having added the typescript.tsdk entry it's then also necessary to use the VS Code UI to select the new version:
- Click on the version displayed in the VS Code footer:
- Select it in the UI:

Related Solutions

Jquery – how to change div text after form submit

The # symbol identifies the ID of the element. Use .text() to set the inner text.

$('div#printdirec').text('tttt');

Reset a char *array[size] contents

You have

char *array[size];

That makes array an array of pointers. Specifically, array is an array of size pointers. Each element in the array (array[0] to array[size-1]) is of type char *.

I think it would help if you understood how array works:

+-------+-------+-------+-------+
|  [0]  |  [1]  |  [2]  |  [3]  |
+-------+-------+-------+-------+
    |       |       |       |
    |       |       |       |
    |       |       |       |
    v       v       v       v

Each of the boxes above represents a pointer, and the arrows are where they are pointing to. The storage for them is not yet assigned to, so they are just "out there", pointing nowhere useful. You can either create memory for them (malloc() etc., in C, new[] in C++), or you can point them to some existing location.

You say:

...put some strings in it. If I assign something again to them, they don't replace the previous contents but they keep on appending on the previous contents. How do I correctly clear/reset all of its contents?

It is not clear how you are putting "strings in it". Do you mean you are storing strings in array[0]..array[size-1]? How? Are you assigning literal strings to them? Something like:

array[0] = "String";

If you are doing that, then, you can reassign to the pointers and the strings wouldn't append. In other words, if later in your program you do:

array[0] = "Another string";

you are reassigning the pointer array[0] to point to "Another string", and thus you're not appending.

So, in short, we need to see more code, and you may need to understand pointers and arrays better.

Edit: Based upon your edit, the pointers myMainArr[i] (for i=0 to i=3), do get reassigned to the corresponding elements from myArrOne or myArrOne (not a typo!), depending upon the contents of action. So, if you printed them (for example, printf("%s\n", myMainArr[0]);), you shouldn't see any strings being appended. Also, myMainArr is local to your function function, so it gets destroyed when your function returns. (Incidentally, your choice of the names array for an array and function for a function make it harder to be unambiguous when answering the question!)

If you are having a problem, please post a complete, minimal, compilable code that shows the problem.