char

isAlphabetic

isAlphabetic(ch)

Detect a character whether it is one of a-z or A-Z.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isAlphabetic('a');
// => true

isAlphabetic('1');
// => false

isAlphanumeric

isAlphanumeric(ch)

Detect a character whether it is one of a-z or A-Z or 0-9.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isAlphanumeric('a');
// => true

isAlphanumeric('1');
// => true

isAlphanumeric('*');
// => false

isASCII

isASCII(ch)

Detect a character whether it is an ASCII character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isASCII('a');
// => true

isASCII('1');
// => true

isASCII('你');
// => false

isCJK

isCJK(ch)

Detect a character whether it is a CJK (Chinese, Japanese and Korean) character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isCJK('你');
// => true

isCJK('の');
// => true

isControl

isControl(ch)

Detect a character whether it is a control character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isControl('\t');
// => true

isControl('\r');
// => true

isDigit

isDigit(ch)

Detect a character whether it is a decimal digit (0-9).

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isDigit('0');
// => true

isDigit('1');
// => true

isGraph

isGraph(ch)

Detect a character whether it is a graphic character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isGraph('0');
// => true

isGraph('a');
// => true

isHexadecimal

isHexadecimal(ch)

Detect a character whether it is a hexadecimal character (0-9, a-f, A-F).

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isHexadecimal('0');
// => true

isHexadecimal('a');
// => true

isHexadecimal('A');
// => true

isLower

isLower(ch)

Detect a character whether it is a lower-case character (a-z).

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isLower('a');
// => true

isPrint

isPrint(ch)

Detect a character whether it is a printable character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isPrint('a');
// => true

isPunctuation

isPunctuation(ch)

Detect a character whether it is a punctuation character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isPunctuation(',');
// => true

isSpace

isSpace(ch)

Detect a character whether it is a space character.

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isSpace(' ');
// => true

isUpper

isUpper(ch)

Detect a character whether it is a upper-case character (A-Z).

Since

0.1.0

Arguments

• ch (string): A string with length equal to 1.

Return

• (boolean)

Example

isUpper('a');
// => true