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TypeScript code kata list

All code kata lists

004 TypeScript – arrays

Duration

10 Minutes

Brief

Using arrays

For more information

BING/GOOGLE: “TypeScript arrays”

Instructions

Get tutorial folder or the entire katas-typescript repo.
Open the [before/*.sln] file and execute the kata.
Feel free to execute this kata multiple times because repetition creates motor memory.

Github

• Before (start kata with this)
  
  • https://github.com/robertdunaway/katas-typescript/tree/master/004%20TypeScript%20-%20arrays/before
• After
  
  • https://github.com/robertdunaway/katas-typescript/tree/master/004%20TypeScript%20-%20arrays/after

Kata

Create an array named “list1” with the values 1, 2, 3. Send result to the console.

    // New array
    var list1: number[] = [1, 2, 3];
    console.log('list1 array = ' + list1);

Create an array named “list2” with values 1,2,3. This time use a generic array. Send result to the console.

    // results in the same array as the one above.  This is a style preference.
    var list2: Array<number> = [1, 2, 3];
    console.log('list2 array = ' + list2);

Create an array named “anyList” with values 1,true,”three”. This time use type any to create the array. Send result to the console.

    //Creating an array of type “any”.
    var anyList: any[] = [1, true, "three"];
    console.log('anyList[] = ' + anyList);
    anyList[1] = 100;
    console.log('anyList[] = ' + anyList);

Create an array named “list3” of type “string” and set its length to 10. Send result to the console.

    // Set the length of an array structure to 10.
    var list3:string[] = new Array(10);
    console.log('list3 = ' + list3);

Next

Take a few minutes and imagine more examples.