is not strictly a

Type

operator

Summary

Evaluates to true if the actual type of value is not the specified type.

Syntax

<value> is not strictly { nothing | a boolean | a number | an integer | a real | a string | a name | a binary string | an array }

Description

Use the is not strictly a operator to determine what the true type of a value is not. The true type of a value is the representation which the engine is currently holding for it, without performing any implicit type coercion. The true type of a value can be one of the following:

• nothing: no value, typically seen as empty
• boolean: either true or false, typically seen as the result of a comparison operator
• number: a numeric value
• integer: a numeric value internally represented as an integer value
• real: a numeric value internally represented as a floating-point value
• string: a piece of text (sequence of characters)
• name: a string used as an array key or literal
• binary string: a sequence of bytes
• array: an associative array

The is not strictly a operator differs from is not a in that it does not perform any type coercion. For example, x not is a number would return false only when x holds neither a number nor holds a string which can be parsed as a number; whereas x is not strictly an number only returns false if x does not currently hold a number.

note

Whether a numeric value is not strictly an integer, or not strictly a real will depend on how it was generated. In particular, being not strictly an integer does not mean the value has a fractional part.

Parameters

Name	Type	Description
value		The expression which will be tested for its type.

Examples

"Hello World!" is not strictly a string -- evaluates to false

1 + 200 is not strictly an number -- evaluates to false

(100 is 100) is not strictly a boolean -- evaluates to false

the compress of "Hello World!" is not strictly a binary string -- evaluates to false

Related

operator: is strictly a, is a, is not a, as a

Compatibility and Support

Introduced

LiveCode 8.0

OS

mac

windows

linux

ios

android

Platforms

desktop

server

mobile