# jorgef-lopezm's solution

## to Isogram in the Go Track

Published at Sep 19 2019 · 0 comments
Instructions
Test suite
Solution

Determine if a word or phrase is an isogram.

An isogram (also known as a "nonpattern word") is a word or phrase without a repeating letter, however spaces and hyphens are allowed to appear multiple times.

Examples of isograms:

• lumberjacks
• background
• downstream
• six-year-old

The word isograms, however, is not an isogram, because the s repeats.

## Running the tests

To run the tests run the command `go test` from within the exercise directory.

If the test suite contains benchmarks, you can run these with the `--bench` and `--benchmem` flags:

``````go test -v --bench . --benchmem
``````

Keep in mind that each reviewer will run benchmarks on a different machine, with different specs, so the results from these benchmark tests may vary.

## Further information

For more detailed information about the Go track, including how to get help if you're having trouble, please visit the exercism.io Go language page.

## Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

### cases_test.go

``````package isogram

// Source: exercism/problem-specifications
// Commit: 74869e8 isogram: Add test case for dupe after non-letter (fixes #1390)
// Problem Specifications Version: 1.7.0

var testCases = []struct {
description string
input       string
expected    bool
}{
{
description: "empty string",
input:       "",
expected:    true,
},
{
description: "isogram with only lower case characters",
input:       "isogram",
expected:    true,
},
{
description: "word with one duplicated character",
input:       "eleven",
expected:    false,
},
{
description: "word with one duplicated character from the end of the alphabet",
input:       "zzyzx",
expected:    false,
},
{
description: "longest reported english isogram",
input:       "subdermatoglyphic",
expected:    true,
},
{
description: "word with duplicated character in mixed case",
input:       "Alphabet",
expected:    false,
},
{
description: "word with duplicated character in mixed case, lowercase first",
input:       "alphAbet",
expected:    false,
},
{
description: "hypothetical isogrammic word with hyphen",
input:       "thumbscrew-japingly",
expected:    true,
},
{
description: "hypothetical word with duplicated character following hyphen",
input:       "thumbscrew-jappingly",
expected:    false,
},
{
description: "isogram with duplicated hyphen",
input:       "six-year-old",
expected:    true,
},
{
description: "made-up name that is an isogram",
input:       "Emily Jung Schwartzkopf",
expected:    true,
},
{
description: "duplicated character in the middle",
input:       "accentor",
expected:    false,
},
{
description: "same first and last characters",
input:       "angola",
expected:    false,
},
}``````

### isogram_test.go

``````package isogram

import "testing"

func TestIsIsogram(t *testing.T) {
for _, c := range testCases {
if IsIsogram(c.input) != c.expected {
t.Fatalf("FAIL: %s\nWord %q, expected %t, got %t", c.description, c.input, c.expected, !c.expected)
}

t.Logf("PASS: Word %q", c.input)
}
}

func BenchmarkIsIsogram(b *testing.B) {
for i := 0; i < b.N; i++ {

for _, c := range testCases {
IsIsogram(c.input)
}

}
}``````
``````package isogram

import "strings"

// IsIsogram returns a bool checking if word is an isogram or not
func IsIsogram(word string) bool {
word = strings.ToLower(word)

for _, symbol := range word {
if symbol == ' ' || symbol == '-' {
continue
}

if (strings.Count(word, string(symbol)) > 1) {
return false
}
}

return true
}``````

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