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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'
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Today I saw this code:
e = [div] (div is html object)
if (e.empty(), y) {y.$sheet = e;}
How JS define y?
What is y.$sheet?
I tried to y = e.empty(), but it doesn't work (error with defining y.$sheet = e
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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))
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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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Trying to generate a set of strings such as 'TCP', 'DNS' or 'SQL'
I want to be able to have these strings set and be able to have them appear randomly like you would with random numbers.
You can make an array and select them randomly:
const strings = ['TCP', 'DNS', 'SQL'];
for (var i = 0; i < 5; i++) {
console.log(`Random string: ${strings[Math.floor(Math.random() * strings.length)]}`);
}
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When I console.log(arrayname) I get this:
How do I Output the value "test"?
Just take the index of the array.
var arrayname = ['test'];
console.log(arrayname[0]);
// ^^^
var foo = Array('bar', 'baz', 'qux');
alert(foo[0]); //First item
alert(foo[1]); //Second item
alert(foo[2]); //Third item