36 lines
1.9 KiB
Markdown
36 lines
1.9 KiB
Markdown
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# Hints
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## General
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- Read about strings in the official [Getting Started guide][getting-started-strings].
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- Browse the [functions available in the _String module_][string-module-functions] to discover which operations on strings Elixir's standard library offers.
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## 1. Get the name's first letter
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- There is a [built-in function][string-first] to get the first character from a string.
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- There are multiple [built-in functions][string-trim] to remove leading, trailing, or leading and trailing whitespaces from a string.
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## 2. Format the first letter as an initial
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- There is a [built-in function][string-upcase] to convert all characters in a string to their uppercase variant.
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- There is an [operator][kernel-concat] that concatenates two strings.
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## 3. Split the full name into the first name and the last name
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- There is a [built-in function][string-split] that splits a string on whitespace characters.
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- A few first elements of a list can be assigned to variables by pattern matching on the list.
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## 4. Put the initials inside of the heart
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- There is a special syntax for [interpolating][string-interpolation] an expression inside of a string.
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- There is a special syntax for writing [multiline strings][heredoc-syntax] without needing to escape newlines.
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[getting-started-strings]: https://elixir-lang.org/getting-started/basic-types.html#strings
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[string-module-functions]: https://hexdocs.pm/elixir/String.html#functions
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[string-first]: https://hexdocs.pm/elixir/String.html#first/1
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[string-trim]: https://hexdocs.pm/elixir/String.html#trim/1
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[string-upcase]: https://hexdocs.pm/elixir/String.html#upcase/2
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[string-split]: https://hexdocs.pm/elixir/String.html#split/1
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[string-interpolation]: https://hexdocs.pm/elixir/String.html#module-interpolation
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[kernel-concat]: https://hexdocs.pm/elixir/Kernel.html#%3C%3E/2
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[heredoc-syntax]: https://elixir-examples.github.io/examples/multiline-strings-heredocs
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