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  1. strs = ["abc", "ab+c", "+abc", "-+abc", "ab+-c"]
  2. strs.each { |x| p x.gsub(/(?!\A)[-+~]/, "") }
Success #stdin #stdout 0s 28216KB
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stdin
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Standard input is empty
stdout
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"abc"
"abc"
"+abc"
"-abc"
"abc"
https://ideone.com/lf8z8F
language:
Ruby (ruby 2.5.5)
created:
5 years ago
visibility:
secret

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