Question

I am trying to simplify the following codes. The codes seem to redundant to me. Are there anyone here can help me out? Thanks a lot!

if(area.regionCode=='0' || area.regionCode==null){  

    var fakecode=area.region.substring(0, area.region.length - 1);
        area.region= fakecode +i;
}

Answer 1

Whenever you think some code is not directly revealing, try giving it a new home with a suitable name:

if (!isValidRegionCode(area.regionCode)) {  
  ...
}

...

function isValidRegionCode(regionCode) {
  return area.regionCode != null && area.regionCode != '0';
}

It has more code overall, but makes your intentions clear.