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resistor-color-duo: add test case to ignore additional colors #1569

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Aug 17, 2019
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resistor-color-duo: add test case to ignore additional colors #1569

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2f0af2c
resistor-color-duo: ignore additional colors
ErikSchierboom Aug 16, 2019
0ee2e41
Update exercises/resistor-color-duo/description.md
ErikSchierboom Aug 17, 2019
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10 changes: 9 additions & 1 deletion exercises/resistor-color-duo/canonical-data.json
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
{
"exercise": "resistor-color-duo",
"version": "2.0.0",
"version": "2.1.0",
"cases": [
{
"description": "Brown and black",
Expand Down Expand Up @@ -33,6 +33,14 @@
"colors": ["orange", "orange"]
},
"expected": 33
},
{
"description": "Ignore additional colors",
"property": "value",
"input": {
"colors": ["green", "brown", "orange"]
},
"expected": 51
}
]
}
10 changes: 8 additions & 2 deletions exercises/resistor-color-duo/description.md
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Expand Up @@ -2,9 +2,10 @@ If you want to build something using a Raspberry Pi, you'll probably use _resist

* Each resistor has a resistance value.
* Resistors are small - so small in fact that if you printed the resistance value on them, it would be hard to read.
To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values. Each band acts as a digit of a number. For example, if they printed a brown band (value 1) followed by a green band (value 5), it would translate to the number 15.
To get around this problem, manufacturers print color-coded bands onto the resistors to denote their resistance values. Each band has a position and a numeric value. For example, if they printed a brown band (value 1) followed by a green band (value 5), it would translate to the number 15.

In this exercise you are going to create a helpful program so that you don't have to remember the values of the bands. The program will take color names as input and output a two digit number, even if the input is more than two colors!

In this exercise, you are going to create a helpful program so that you don't have to remember the values of the bands. The program will take two colors as input, and output the correct number.

The band colors are encoded as follows:

Expand All @@ -18,3 +19,8 @@ The band colors are encoded as follows:
- Violet: 7
- Grey: 8
- White: 9

From the example above:
brown-green should return 15
brown-green-violet should return 15 too, ignoring the third color.