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inArray

Check if an element exists in an array

Usage

inArray [ element ] [ arrayElement0 ... ]

Check if an element exists in an array Without arguments, displays help.

Arguments

  • element - EmptyString. Thing to search for
  • arrayElement0 ... - Array. Optional. One or more array elements to match

Examples

if inArray "$thing" "${things[@]+"${things[@]}"}"; then
    things+=("$thing")
fi

Return codes

  • 0 - If element is found in array
  • 1 - If element is NOT found in array

isUnsignedNumber

Test if an argument is a positive floating point number

Usage

isUnsignedNumber value

Test if an argument is a positive floating point number (1e3 notation NOT supported)

Arguments

  • value - EmptyString. Required. Value to test.

Return codes

  • 0 - if it is a number equal to or greater than zero
  • 1 - if it is not a number equal to or greater than zero

Credits

Thanks to F. Hauri - Give Up GitHub (isnum_Case) .

isNumber

Test if an argument is a floating point number

Usage

isNumber value

Test if an argument is a floating point number (1e3 notation NOT supported)

Arguments

  • value - EmptyString. Required. Value to test.

Return codes

  • 0 - if it is a floating point number
  • 1 - if it is not a floating point number

Credits

Thanks to F. Hauri - Give Up GitHub (isnum_Case) .

isInteger

Test if an argument is a signed integer

Usage

isInteger value [ value ]

Test if an argument is a signed integer

Arguments

  • value - EmptyString. Required. Value to test.
  • value - EmptyString. The value to test.

Return codes

  • 0 - if it is a signed integer
  • 1 - if it is not a signed integer

Credits

Thanks to F. Hauri - Give Up GitHub (isuint_Case) .

isUnsignedInteger

Is value an unsigned integer?

Usage

isUnsignedInteger [ value ]

Test if a value is a 0 or greater integer. Leading "+" is ok.

Arguments

  • value - EmptyString. Value to test if it is an unsigned integer.

Return codes

  • 0 - if it is an unsigned integer
  • 1 - if it is not an unsigned integer

Credits

Thanks to F. Hauri - Give Up GitHub (isnum_Case) .

isPositiveInteger

Test if an argument is a positive integer (non-zero)

Usage

isPositiveInteger value [ --help ]

Test if an argument is a positive integer (non-zero) Takes one argument only.

Arguments

  • value - EmptyString. Required. Value to check if it is an unsigned integer
  • --help - Flag. Optional. Display this help.

Return codes

  • 0 - if it is a positive integer
  • 1 - if it is not a positive integer

isNumber

Test if an argument is a floating point number

Usage

isNumber value

Test if an argument is a floating point number (1e3 notation NOT supported)

Arguments

  • value - EmptyString. Required. Value to test.

Return codes

  • 0 - if it is a floating point number
  • 1 - if it is not a floating point number

Credits

Thanks to F. Hauri - Give Up GitHub (isnum_Case) .

isFunction

Test if argument are bash functions

Usage

isFunction string [ --help ]

Test if argument are bash functions If no arguments are passed, returns exit code 1.

Arguments

  • string - String. Required. String to test if it is a bash function. Builtins are supported. . is explicitly not supported to disambiguate it from the current directory ..
  • --help - Flag. Optional. Display this help.

Return codes

  • 0 - argument is bash function
  • 1 - argument is not a bash function

isExecutable

Test if all arguments are executable binaries

Usage

isExecutable string

Test if all arguments are executable binaries If no arguments are passed, returns exit code 1.

Arguments

  • string - String. Required. Path to binary to test if it is executable.

Return codes

  • 0 - All arguments are executable binaries
  • 1 - One or or more arguments are not executable binaries

Environment

  • {SEE:PATH.sh}

isCallable

Test if all arguments are callable as a command

Usage

isCallable string

Test if all arguments are callable as a command If no arguments are passed, returns exit code 1.

Arguments

  • string - EmptyString. Required. Path to binary to test if it is executable.

Return codes

  • 0 - All arguments are callable as a command
  • 1 - One or or more arguments are callable as a command

isTrue

True-ish

Usage

isTrue [ --help ] [ value ... ]

True-ish Succeeds when all arguments are "true"-ish

Arguments

  • --help - Flag. Optional. Display this help.
  • value ... - EmptyString. One or more values to test.

Return codes

  • 0 - Success
  • 1 - Environment error
  • 2 - Argument error

isType

Bash types beyond type -t

Usage

isType

Bash types beyond type -t

Arguments

  • none

Return codes

  • 0 - Success
  • 1 - Environment error
  • 2 - Argument error

isArray

Is a variable declared as an array?

Usage

isArray variableName [ --help ]

Is a variable declared as an array?

Arguments

  • variableName - String. Required. Variable name to check.
  • --help - Flag. Optional. Display this help.

Return codes

  • 0 - Success
  • 1 - Environment error
  • 2 - Argument error

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