Mega Code Archive

 

Categories / Ruby / String

 

Change a string with range

s = "hello" s[2..3]           # "ll": characters 2 and 3 s[-3..-1]         # "llo": negative indexes work, too s[0..0]           # "h": this Range includes one character index s[0...0]          # "": this Range is empty s[2..1]           # "": this Range is also empty s[7..10]          # nil: this Range is outside the string bounds s[-2..-1] = "p!"     # Replacement: s becomes "help!" s[0...0] = "Please " # Insertion: s becomes "Please help!" s[6..10] = ""        # Deletion: s becomes "Please!"