无论如何，console.log 没有换行符吗？

Question

I want to console.log() my array like this without newlines

let myarr = [1,2,3,4,5];
myarr.forEach(e => console.log(e));

Answer 1

You could spread the array. Then all values are taken as parameters.

 let array = [1, 2, 3, 4, 5]; console.log(...array);

Answer 2

You can use .reduce() instead.

 let myarr = [1,2,3,4,5]; const result = myarr.reduce((a, c) => `${a}${c}`, ''); console.log(result);

I hope this helps!

Answer 3

Why are you doing a separate console.log for every element in the array? You can just do:

console.log(myarr);

Or, if your array has objects in it and you want to see them all unrolled, you could do:

console.log(JSON.stringify(myarr));

Answer 4

You would have to stringify your output.

So either using something like JSON.stringify(myarr) or

let string = '';
for(let i = 1; i < 6; i += 1) {
  string += i + ' ';
}
console.log(string);

Edit: Btw, I'd suggest using camelCase when working with javascript. It's become a standard when defining variables and methods.

See: https://techterms.com/definition/camelcase

Answer 5

To answer the actual question, there are two possible answers:

1. If you are running in a browser, then by default, no, but according to this answer from Chrome JavaScript developer console: Is it possible to call console.log() without a newline? you can by making a virtual console on top of the browser's console.
2. If you're using node, then you can use process.stdout.write(msg) from this answer Chrome JavaScript developer console: Is it possible to call console.log() without a newline?