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- 4D Language Reference
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- Objects (Language)
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Structure of 4D language objects
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Using object notation
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Shared objects and shared collections
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New object
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New shared object
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OB Class
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OB Copy
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OB Entries
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OB Get
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OB GET ARRAY
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OB GET PROPERTY NAMES
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OB Get type
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OB Instance of
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OB Is defined
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OB Is empty
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OB Is shared
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OB Keys
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OB REMOVE
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OB SET
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OB SET ARRAY
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OB SET NULL
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OB Values
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Storage
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OB Keys
| OB Keys ( object ) -> Function result | ||||||||
| Parameter | Type | Description | ||||||
| object | Object |
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Object to return property names | |||||
| Function result | Collection |
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Collection of property names (strings) | |||||
The OB Keys command returns a collection of strings containing all of the enumerable property names of the object.
Only first-level property names are returned (property names of sub-objects are not returned). The order of names within the returned collection follows the definition order of the properties.
You want a collection with all first-level property names of an object:
C_OBJECT($person)
C_COLLECTION($col)
$person:=New object
$person.lastName:="Smith"
$person.firstName:="Jenny"
$person.children:=New object("Mary";12;"Mark";8)
$col:=OB Keys($person)
//$col[0]="lastName"
//$col[1]="firstName"
//$col[2]="children"
Product: 4D
Theme: Objects (Language)
Number:
1719
Created: 4D v18 R3
4D Language Reference ( 4D v20 R7)
