IsAscii
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Tests if a string contains only ASCII characters.
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IsBlank
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Tests if a string contains only blank characters.
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IsDigit
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Tests if a string contains only digits.
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IsHexa
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Tests if a string contains only hexadecimal digits.
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IsLCase
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Tests if a string contains only lowercase letters.
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IsLetter
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Tests if a string contains only letters.
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IsPunct
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Tests if a string contains only printable non-alphanumeric characters.
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IsSpace
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Tests if a string contains only space characters.
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IsUCase
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Tests if a string contains only uppercase letters.
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