Implement exercise 'resistor-color-duo'

Author: ingydotnet

config.json

@@ -76,6 +76,14 @@
         "prerequisites": [],
         "difficulty": 1
       },
+      {
+        "slug": "resistor-color-duo",
+        "name": "Resistor Color Duo",
+        "uuid": "8a49347f-461f-415c-b203-bb491ac98fac",
+        "practices": [],
+        "prerequisites": [],
+        "difficulty": 1
+      },
       {
         "slug": "reverse-string",
         "name": "Reverse String",

config.yaml

@@ -78,6 +78,13 @@ exercises:
     prerequisites: []
     difficulty: 1
 
+  - slug: resistor-color-duo
+    name: Resistor Color Duo
+    uuid: 8a49347f-461f-415c-b203-bb491ac98fac
+    practices: []
+    prerequisites: []
+    difficulty: 1
+
   - slug: reverse-string
     name: Reverse String
     uuid: 89681570-5734-4f20-b68f-de8b176accdc

exercises/practice/resistor-color-duo/.docs/instructions.md

@@ -0,0 +1,33 @@
+# Instructions
+
+If you want to build something using a Raspberry Pi, you'll probably use _resistors_.
+For this exercise, you need to know two things about them:
+
+- 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 has a position and a numeric value.
+
+The first 2 bands of a resistor have a simple encoding scheme: each color maps to a single 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.
+
+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!
+
+The band colors are encoded as follows:
+
+- black: 0
+- brown: 1
+- red: 2
+- orange: 3
+- yellow: 4
+- green: 5
+- blue: 6
+- violet: 7
+- grey: 8
+- white: 9
+
+From the example above:
+brown-green should return 15, and
+brown-green-violet should return 15 too, ignoring the third color.

exercises/practice/resistor-color-duo/.meta/.yamlscript/exercise.mk

@@ -0,0 +1 @@
+YS_VERSION := 0.1.75

exercises/practice/resistor-color-duo/.meta/Makefile

@@ -0,0 +1,28 @@
+SHELL := bash
+
+BASE := $(shell pwd)
+
+export YS_VERSION := 0.1.76
+
+YS_LOCAL_PREFIX := ../../../../.local/v$(YS_VERSION)
+
+YS_LOCAL_BIN := $(YS_LOCAL_PREFIX)/bin
+
+YS_BIN := $(YS_LOCAL_BIN)/ys-$(YS_VERSION)
+
+TEST_FILE ?= $(wildcard *-test.ys)
+
+
+export PATH := $(YS_LOCAL_BIN):$(PATH)
+
+export YSPATH := $(BASE)
+
+
+default:
+
+test: $(YS_BIN)
+	prove -v $(TEST_FILE)
+
+$(YS_BIN):
+	curl -s https://yamlscript.org/install | \
+	  BIN=1 VERSION=$(YS_VERSION) PREFIX=$(YS_LOCAL_PREFIX) bash >/dev/null

exercises/practice/resistor-color-duo/.meta/config.json

@@ -0,0 +1,23 @@
+{
+  "authors": [
+    "ingydotnet"
+  ],
+  "files": {
+    "solution": [
+      "resistor-color-duo.ys"
+    ],
+    "test": [
+      "resistor-color-duo-test.ys",
+      "GNUmakefile",
+      "Makefile",
+      ".yamlscript/exercise.mk",
+      ".yamlscript/exercism-ys-installer"
+    ],
+    "example": [
+      ".meta/resistor-color-duo.ys"
+    ]
+  },
+  "blurb": "Convert color codes, as used on resistors, to a numeric value.",
+  "source": "Maud de Vries, Erik Schierboom",
+  "source_url": "https://github.com/exercism/problem-specifications/issues/1464"
+}

exercises/practice/resistor-color-duo/.meta/resistor-color-duo-test.ys

@@ -0,0 +1,43 @@
+#!/usr/bin/env ys-0
+
+require ys::taptest: :all
+
+use: resistor-color-duo
+
+test::
+- name: Brown and black
+  code: value(["brown" "black"])
+  want: 10
+  uuid: ce11995a-5b93-4950-a5e9-93423693b2fc
+
+- name: Blue and grey
+  code: value(["blue" "grey"])
+  want: 68
+  uuid: 7bf82f7a-af23-48ba-a97d-38d59406a920
+
+- name: Yellow and violet
+  code: value(["yellow" "violet"])
+  want: 47
+  uuid: f1886361-fdfd-4693-acf8-46726fe24e0c
+
+- name: White and red
+  code: value(["white" "red"])
+  want: 92
+  uuid: b7a6cbd2-ae3c-470a-93eb-56670b305640
+
+- name: Orange and orange
+  code: value(["orange" "orange"])
+  want: 33
+  uuid: 77a8293d-2a83-4016-b1af-991acc12b9fe
+
+- name: Ignore additional colors
+  code: value(["green" "brown" "orange"])
+  want: 51
+  uuid: 0c4fb44f-db7c-4d03-afa8-054350f156a8
+
+- name: Black and brown, one-digit
+  code: value(["black" "brown"])
+  want: 1
+  uuid: 4a8ceec5-0ab4-4904-88a4-daf953a5e818
+
+done: 7

exercises/practice/resistor-color-duo/.meta/resistor-color-duo.ys

@@ -0,0 +1,11 @@
+!yamlscript/v0
+
+
+colors =:
+  zipmap _ range():
+    qw(black brown red orange yellow
+       green blue violet grey white)
+
+defn value([c1 c2]):
+  colors.$c1 * 10 +: colors.$c2
+

exercises/practice/resistor-color-duo/.meta/tests.toml

@@ -0,0 +1,31 @@
+# This is an auto-generated file.
+#
+# Regenerating this file via `configlet sync` will:
+# - Recreate every `description` key/value pair
+# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications
+# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion)
+# - Preserve any other key/value pair
+#
+# As user-added comments (using the # character) will be removed when this file
+# is regenerated, comments can be added via a `comment` key.
+
+[ce11995a-5b93-4950-a5e9-93423693b2fc]
+description = "Brown and black"
+
+[7bf82f7a-af23-48ba-a97d-38d59406a920]
+description = "Blue and grey"
+
+[f1886361-fdfd-4693-acf8-46726fe24e0c]
+description = "Yellow and violet"
+
+[b7a6cbd2-ae3c-470a-93eb-56670b305640]
+description = "White and red"
+
+[77a8293d-2a83-4016-b1af-991acc12b9fe]
+description = "Orange and orange"
+
+[0c4fb44f-db7c-4d03-afa8-054350f156a8]
+description = "Ignore additional colors"
+
+[4a8ceec5-0ab4-4904-88a4-daf953a5e818]
+description = "Black and brown, one-digit"

exercises/practice/resistor-color-duo/.yamlscript/exercise.mk

@@ -0,0 +1 @@
+YS_VERSION := 0.1.75