View foreach result out of it

Question

Is there any form of data forEach be viewed outside the forEach?

I need to see the data from forEach out of it, but every time I do it it only returns the last data, not all data. I have tried using the localStorage and the same result.

If not, there is some way to make a forEach with two arrays? Could you give examples?

My code:

this.MetaService.CheckOrderGet().subscribe(
              data => {
                const pesquisa = (data as any)
                this.check = JSON.parse(pesquisa._body)            


                this.check.forEach(apielement => {

                  this.fil.forEach(dados=> {            


                    if (apielement.FI == dados.FI) {
                      console.log(`Dados iguais ${apielement.FI}`);                      
                    }else{
                      console.log(`Diferentes ${apielement.FI}`);

                    }

                  })                
              }
            )

Answer 1

I didn’t understand your doubt very well, but this function here makes the comparison between the two arrays, line by line, verifying the data in each position whether they are equal or different. Start by scanning the first array and traverse the second array by comparing the indices.

const a = [1, 2, 3, 4, 5, 6, 7];
const b = [5, 4, 3, 1, 2, 5, 6];

a.forEach(function(valor){
    b.forEach(function(v) {
        if(v === valor)
            console.log('iguais');
        else
            console.log('diferentes');
    });
});

Answer 2

this.MetaService.CheckOrderGet().subscribe(
data => {
const pesquisa = (data as any)
this.check = JSON.parse(pesquisa._body)            

this.new = [];
for (var key in this.check) {
  if (this.check[key].FI == this.fil[key].FI){
   this.new[] = `Dados iguais ${this.check[key].FI}`;
  }else{
  this.new[] = `Diferentes ${this.check[key].FI}`;
  }
}

);

the new will be out of forech