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Added null check to easy answer.
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Armand
  • 519
  • 2
  • 7

Groovy

Easy: 26 2525 30 characters

c={(it=~/[\W^_][[^\00\w]_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_''_|') == 12
assert c('\0') == 0

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1

Groovy

Easy: 26 25 characters

c={(it=~/[\W^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1

Groovy

Easy: 26 25 30 characters

c={(it=~/[[^\00\w]_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_|') == 2
assert c('\0') == 0

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1
Removed unnecessary character from regex in Easy answer
Source Link
Armand
  • 519
  • 2
  • 7

Groovy

Easy: 2626 25 characters

c={(it=~/[\W|^_][\W^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1

Groovy

Easy: 26 characters

c={(it=~/[\W|^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1

Groovy

Easy: 26 25 characters

c={(it=~/[\W^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1
added 314 characters in body
Source Link
Armand
  • 519
  • 2
  • 7

Groovy

Easy: 26 characters

c={(it=~/[\W|^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1

Groovy

Easy: 26 characters

c={(it=~/[\W|^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Groovy

Easy: 26 characters

c={(it=~/[\W|^_]/).size()}

assert c("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert c("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert c("a-b-7*NNuah ~#77%")==7
assert c('_') == 1

Hard: 47 characters

s={it.replaceAll(/[\w&&[^_]]/,'').bytes.size()}

assert s("abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789")== 2
assert s("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")==0
assert s("a-b-7*NNuah ~#77%")==7
assert s('_') == 1
Source Link
Armand
  • 519
  • 2
  • 7
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