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I want to get the first letter of each word put together, making something like "I need help" turn into "Inh". I was thinking to trim everything off, then going from there, or grab each first letter right away.
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In Ruby, we can use the built-in chr method to access the first character of a string. Similarly, we can also use the subscript syntax [0] to get the first character of a string. The above syntax extracts the character from the index position 0 .
To get the first letter of each word in a string: Call the split() method on the string to get an array containing the words in the string. Call the map() method to iterate over the array and return the first letter of each word. Join the array of first letters into a string, using the join() method.
=~ is Ruby's basic pattern-matching operator. When one operand is a regular expression and the other is a string then the regular expression is used as a pattern to match against the string. (This operator is equivalently defined by Regexp and String so the order of String and Regexp do not matter.
A regular expression is a sequence of characters that define a search pattern, mainly for use in pattern matching with strings. Ruby regular expressions i.e. Ruby regex for short, helps us to find particular patterns inside a string. Two uses of ruby regex are Validation and Parsing.
You could simply use split, map and join together here.
string = 'I need help'
result = string.split.map(&:first).join
puts result #=> "Inh"
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