I’m looking at some external code and saw a line of Ruby code that looks like this
string_name = string_name[3..-1]
what does the [n..-x] do or mean?
Thanks.
I’m looking at some external code and saw a line of Ruby code that
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I’m looking at some external code and saw a line of Ruby code that looks like this
string_name = string_name[3..-1]
what does the [n..-x] do or mean?
Thanks.
Ruby supports negative indexing of arrays. So index -1 is the last element of the array, -2 is the second to last, etc. Think of starting at the beginning of the array, and wrapping around from the back.
So in this case,
string_names[3..-1]is basically a substring from 3 to the end of the string.