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 );