export class FunctionUtils { public static debounce ( callback , interval ) { var t = null ; return ( ... args ) => { if ( t ) { window . clearTimeout ( t ) ; } t = window . setTimeout ( ( ) => callback . apply ( this , args ) , interval ) ; } ; } ; } export class UUID { public static generate ( ) { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx' . replace ( /[xy]/g , ( c ) => { var r = Math . random ( ) * 16 | 0 ; var v = c === 'x' ? r : ( r & 0x3 | 0x8 ) ; return v . toString ( 16 ) ; } ) ; } }