“Callback Hell” Kode Jawaban

Callback Hell

fs.readdir(source, function (err, files) {
  if (err) {
    console.log('Error finding files: ' + err)
  } else {
    files.forEach(function (filename, fileIndex) {
      console.log(filename)
      gm(source + filename).size(function (err, values) {
        if (err) {
          console.log('Error identifying file size: ' + err)
        } else {
          console.log(filename + ' : ' + values)
          aspect = (values.width / values.height)
          widths.forEach(function (width, widthIndex) {
            height = Math.round(width / aspect)
            console.log('resizing ' + filename + 'to ' + height + 'x' + height)
            this.resize(width, height).write(dest + 'w' + width + '_' + filename, function(err) {
              if (err) console.log('Error writing file: ' + err)
            })
          }.bind(this))
        }
      })
    })
  }
})
Abror

Callback Hell

let order = (call_production) => {
  setTimeout(() => {    
    call_production();
  }, 1000);
};
let production = () => {
  setTimeout(() => {
    console.log("step 1");
    setTimeout(() => {
      console.log("step 2");
      setTimeout(() => {
        console.log("step 3");
        setTimeout(() => {
          console.log("step 4");
          setTimeout(() => {
            console.log("step 5");
            setTimeout(() => {
              console.log("step 6");
              setTimeout(() => {
                console.log("step 7");
                setTimeout(() => {
                  console.log("step 8");
                  setTimeout(() => {
                    console.log("step 9");
                    setTimeout(() => {
                      console.log("step 10");
                      setTimeout(() => {
                        console.log("A call backhell");
                      }, 1000);
                    }, 1000);
                  }, 1000);
                }, 1000);
              }, 1000);
            }, 1000);
          }, 1000);
        }, 1000);
      }, 1000);
    }, 1000);
  }, 1000);
};
order(production);
polyglot orca

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