How to work with character arrays¶

In MARPLE, a string is a character vector -- each element is a single character:

      greeting ← 'Hello, world!'
      ⍴greeting
13

You can index, reverse, and reshape character vectors just like numeric ones:

      greeting[1]
H

      ⌽greeting
!dlrow ,olleH

Character matrices¶

A table of strings is a character matrix. Rows are padded with spaces to equal length:

      names ← 3 5⍴'AliceBob  Clara'

This creates a 3-by-5 matrix where each row is a 5-character name.

      $::str::upper 'hello'
HELLO

      $::str::lower 'HELLO'
hello