Iterate over array of objects

[espruino-discuss]

Posted at 2020-03-03 by @MaBecker

How to write this correct?

var replaceList  = { 
  yyyy: "d.getFullYear()", 
  yy:   "d.getFullYear().substr(-2)",
  mm:   "('0'+d.getMonth()).substr(-2)",
  dd:   "('0'+d.getDay()).substr(-2)",
  d:    "d.getDay()",
  m:    "d.getMonth()",
  HH:   "('0'+d.getHours()).substr(-2)",
  MM:   "('0'+d.getMinutes()).substr(-2)",
  SS:   "('0'+d.getSeconds()).substr(-2)",
  //.... and more 
};

// create time normal 
var timePattern =  { 0: "HH:MM:SS ", 1: "HH:MM" };
var timeN =  timePattern[0];
replaceList.forEach(e => {
  timeN = timeN.replace(e,replaceList[e]);
});
console.log(timeN);

[gfwilliams]

Posted at 2020-03-03 by @gfwilliams

I think Object.keys will do you:

Object.keys(replaceList).forEach(e => {
  timeN = timeN.replace(e,replaceList[e]);
});

[espruino-discuss]

Posted at 2020-03-03 by @MaBecker

Thanks, it works

console.log(timeN);
('0'+d.getHours()).substr(-2):('0'+d.getMinutes()).substr(-2):('0'+d.getSeconds()).substr(-2)

[espruino-discuss]

Posted at 2020-03-04 by @allObjects

Quite interesting... this logic pulls it of 'the other way round'... which may become a performance challenge when the replaceList being larger and larger compared to the pattern elements...

[gfwilliams]

Posted at 2020-03-04 by @gfwilliams

which may become a performance challenge

It'll definitely get slower, however in this case we're actually doing the work on the PC before upload to the Bangle.js, so I don't think it'll be that big a deal for us. On Bangle.js itself this could be a complete pain though.

[espruino-discuss]

Posted at 2020-03-04 by @allObjects

Ic... it is a one-time-thing of composing/generating the code before uploading it... as source?

[gfwilliams]

Posted at 2020-03-04 by @gfwilliams

That's the idea :)