TypeScript - the use of closure functions

function loggingCompare(

logger:(a:number,b:number)=>void,

comp:(a:number,b:number) => number){

return (a:number,b:number)=>{

logger(a,b)

return comp(a,b)

}

}

function create(bbb:{smallFirst:Boolean}){

if (!bbb.smallFirst){

return (a:number,b:number) => b-a

}else{

return (a:number,b:number) => a-b

}

}

function processArray(a:number[]){

let comCount = 0

const logger =(a:number,b:number)=>{

// console.log("compare",a,b)

comCount++

}

const comp = create({smallFirst:true})

a.sort(loggingCompare(logger,comp))

return comCount

}

let a = [2,3,4,5,6,7,8,10,1]

const comCount1=processArray(a)

const comCount2=processArray(a)

console.log(a)

console.log(comCount1,comCount2)