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[typescript/resistor-color] Create mentoring.md #2319

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[typescript/resistor-color] Create mentoring.md #2319

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Create mentoring.md
mendoncamaria Jan 27, 2024
f3bf70c
Merge pull request #1 from mendoncamaria/mendoncamaria-patch-1
mendoncamaria Jan 27, 2024
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27 changes: 27 additions & 0 deletions tracks/typescript/exercises/resistor-color/mentoring.md
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### Topics Covered:
1. <a href="https://www.w3schools.com/typescript/typescript_arrays.php" target=_blank> Array in Typescript</a>
2. <a href="https://www.tutorialspoint.com/typescript/typescript_array_indexof.htm" target=_blank>Get index using inbuilt function</a>

In the problem statement, the colors and their code are already mentioned. So first let us define an array of colors.
```
export const COLORS = [
'black',
'brown',
'red',
'orange',
'yellow',
'green',
'blue',
'violet',
'grey',
'white',
]
```

Now we have an array, we can directly get code by fetching the index of the parameter color in the array and using the Array.indexOf() to achieve our results.

```
export const colorCode = (color: string) => {
return COLORS.indexOf(color);
}
```
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