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- 4D Language Reference
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- Collections
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About collections
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Type conversions between collections and 4D arrays
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collection.length
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collection.average( )
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collection.clear( )
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collection.combine( )
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collection.concat( )
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collection.copy( )
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collection.count( )
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collection.countValues( )
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collection.distinct( )
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collection.equal( )
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collection.every( )
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collection.extract( )
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collection.fill( )
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collection.filter( )
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collection.find( )
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collection.findIndex( )
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collection.indexOf( )
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collection.indices( )
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collection.insert( )
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collection.join( )
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collection.lastIndexOf( )
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collection.map( )
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collection.max( )
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collection.min( )
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collection.orderBy( )
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collection.orderByMethod( )
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collection.pop( )
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collection.push( )
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collection.query( )
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collection.reduce( )
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collection.remove( )
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collection.resize( )
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collection.reverse( )
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collection.shift( )
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collection.slice( )
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collection.some( )
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collection.sort( )
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collection.sum( )
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collection.unshift( )
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ARRAY TO COLLECTION
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COLLECTION TO ARRAY
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New collection
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New shared collection
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collection.pop( )
| collection.pop () -> Function result | ||||||||
| Parameter | Type | Description | ||||||
| Function result | Expression |
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Last element of collection | |||||
The collection.pop( ) method removes the last element from the collection and returns it as the function result.
Note: This method modifies the original collection.
When applied to an empty collection, collection.pop( ) returns undefined.
collection.pop( ), used in conjunction with collection.push( ), can be used to implement a first-in, last-out stack feature:
C_COLLECTION($stack)
$stack:=New collection //$stack=[]
$stack.push(1;2) //$stack=[1,2]
$stack.pop() //$stack=[1] Returns 2
$stack.push(New collection(4;5)) //$stack=[[1,[4,5]]
$stack.pop() //$stack=[1] Returns [4,5]
$stack.pop() //$stack=[] Returns 1
Product: 4D
Theme: Collections
Number:
805253
Created: 4D v16 R6
4D Language Reference ( 4D v19)
4D Language Reference ( 4D v19.1)
4D Language Reference ( 4D v19.4)
4D Language Reference ( 4D v19.5)
4D Language Reference ( 4D v19.6)
4D Language Reference ( 4D v19.7)
4D Language Reference ( 4D v19.8)
