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Overview ¶
Write a program that takes a list of strings on the command line and counts the occurrence of each string. Then output the strings and their counts like this:
bar - 1 foo - 2 quux - 1
You can use fmt.Printf() to print these out with a format of "%s - %d\n"
The output should be sorted by the strings (not their counts). You'll need to use the core sort package for sorting.
If no strings are given at all, log a fatal error with this message:
This program expects at least 1 argument
Note that Go does not let you declare a map variable and then start assigning to it:
var foo map[int]float foo[42] = 42.0
This will blow up with an error like "assignment to entry in nil map"
You can either use make() or create an empty map:
foo := make(map[int]float)
// The {} creates an empty (but initialized) map
foo := map[int]float{}
The use of make() is more idiomatic and what you'll see in most Go code.
To run the tests, run "go build", then "go test -v".
> go build && go test -v
You're done when all the tests pass.
Source Files