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CREATE: mentoring.md #2318

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24 changes: 24 additions & 0 deletions tracks/typescript/exercises/resistor-color/resistor-color/mentoring.md
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In the problem statement, the colors and its 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 use the Array.indexOf() to achieve our results.

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