4D v19
collection.clear( )
- 4D Language Reference
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- Collections
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- About collections
- Type conversions between collections and 4D arrays
- collection.length
- collection.push( )
- collection.insert( )
- collection.countValues( )
- collection.remove( )
- collection.clear( )
- collection.sort( )
- collection.sum( )
- collection.average( )
- collection.pop( )
- collection.indexOf( )
- collection.find( )
- collection.filter( )
- collection.count( )
- collection.min( )
- collection.max( )
- collection.copy( )
- collection.query( )
- collection.shift( )
- collection.unshift( )
- collection.join( )
- collection.orderBy( )
- collection.orderByMethod( )
- collection.extract( )
- collection.indices( )
- collection.concat( )
- collection.combine( )
- collection.reverse( )
- collection.map( )
- collection.every( )
- collection.some( )
- collection.findIndex( )
- collection.lastIndexOf( )
- collection.resize( )
- collection.fill( )
- collection.slice( )
- collection.distinct( )
- collection.equal( )
- collection.reduce( )
- ARRAY TO COLLECTION
- COLLECTION TO ARRAY
- New collection
- New shared collection
4D v19
collection.clear( )
collection.clear( )
The collection.clear( ) method removes all elements from the collection instance and returns an empty collection.
Note: This method modifies the original collection.
C_COLLECTION($col)
$col:=New collection(1;2;5)
$col.clear()
$vSize:=$col.length //$vSize=0
See also
PROPERTIES
Product: 4D
Theme: Collections
PAGE CONTENTS
HISTORY
ARTICLE USAGE
4D Language Reference ( 4D v19)
4D Language Reference ( 4D v19.1)
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