Decrement by 1, return current

Atomically decrements by one the current value and returns the updated (current) value of the counter. Multiple concurrent client requests are guaranteed to return unique updated value.

// *******************************************
// Backendless.Counters approach
// *******************************************
Backendless.Counters.decrementAndGet( counterName )
 .then( function( result ) {
 })
 .catch( function( error ) {
 });

// *******************************************
// Backendless.Counters.of() approach
// *******************************************
var counter = Backendless.Counters.of( counterName );
counter.decrementAndGet()
 .then( function( result ) {
 })
 .catch( function( error ) {
 });

where:

Argument	Description
counterName	name of the counter to decrement.

Example

var successCallback = function( response ) {
  console.log( "counter value is - " + response );
};

var failureCallback = function( fault ) {
  console.log( "error - " + fault.message );
};

// ************************************************
// Backendless.Counters approach
// ************************************************
Backendless.Counters.decrementAndGet( "my counter" )
 .then( successCallback )
 .catch( failureCallback );

// ************************************************
// Backendless.Counters.of() approach
// ************************************************
var myCounter = Backendless.Counters.of( "my counter" );
myCounter.decrementAndGet()
 .then( successCallback )
 .catch( failureCallback );

Codeless Reference

where:

Argument	Description
counter name	Name of the counter whose value must be decremented.
return current value	When this box is checked, the operation returns the current value of the counter.

Returns the current value of the counter.

Consider the following counter:

The example below decrements the value of the "CarsParkingLot" by 1. This operation returns 9, since the return current value box is checked.

The result of this operation will look as shown below after the Codeless logic runs: