Show distance from a polilyne in MapBox [closed] - javascript

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I was developing this polilynes code, and I need to display the polilyne distance completely, how do I do this?
Here below is the code I am using:
https://drive.google.com/file/d/1eQg-hnOFuRWOPWUhg8Lqq38Lc6Pi9uJc/view?usp=sharing

You can calculates geojson with libs like Turf.js.
For example, turf/length measures length of lineString, like below.
const line = turf.lineString([
[-53.08074, -25.766767],
[-53.097358, -25.77123],
[-53.117901, -25.798796],
[-53.147227, -25.801503],
[-53.187904, -25.812659],
[-53.235429, -25.811208],
[-53.276227, -25.802679],
[-53.305865, -25.788242]
]);
const len = turf.length(line, { units: "kilometers" }); // 24.96224597809012

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Loop through and add pixels values javascript [closed]

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I want to know how we can loop through and add pixel values?
Example,
let testArray = [{width: '150px'}, {width : '150px'}]
So i want to loop through it and have to return total value i.e '300px'
Can someone please help me?
let sumWidth = 0
testArray.forEach((object)=>{
sumWidth+= parseInt(object.width.slice(0,-2))
}
let result = sumWidth.toString() + 'px'

How to iterate and append characters of an array by push [closed]

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var charArray=[a,b,c]
I want to have a new array as following:
var charArrayNew=[a, ab, abc]
Please suggest how to get the result of charArrayNew in ES6 Javascript.
You could do this:
const charArray=['a','b','c'];
const answer = charArray.map((_,i,ar)=>ar.slice(0,i+1).join(""));
console.log(answer);
// or, alternatively:
fn=(ar,res=[])=>(
ar.reduce((a,c)=>(res.push(a+=c),a),""),res );
console.log(fn(charArray))

Easy way to resize image in Node.js? [closed]

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After data is loaded from filesystem, which model worth to use to resize image and return to client?
fs.readFile(process.env.OPENSHIFT_DATA_DIR + request.headers['filename'], function read(err, data) {
var w = request.headers['w']
var h = request.headers['h']
response.writeHead(200)
// CODE TO RESIZE DATA
response.write(data)
response.end()
})
Use ImageMagick:
https://www.npmjs.com/package/imagemagick
Or other modules from npm:
https://www.npmjs.com/package/image-resizer
https://www.npmjs.com/package/resize-image
https://www.npmjs.com/package/easyimage

Javascript Array to special Object [closed]

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I need for an Plugin an Object structure like this:
{
"Beer":145.53,
"Apple (red)":7.33,
"Apple (green)":0.03
}
Don't know how to write it that this shine.
I got the all values already so how to set it up like this?
Use this notation to make objects with those properties:
var obj = {};
obj["Beer"] = 145;
obj["Apple (red)"] = 7.5;
....

Formatting String with pattern [closed]

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I have a String variable who represent date
console.log(goDate); --> "23/12/2014"
how I could turn this variable like this..?:
console.log(goDate); --> "2014-12-23".
var goDate = "23/12/2014"; // needs 2014-12-23
var newGoDate = goDate.split('/').reverse().join('-');

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