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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.javascript
Subject: Re: Writing type conversions
Date: Tue, 24 Nov 2020 09:56:16 +0100
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John G Harris:

> On 23 Nov 2020 12:29:27 GMT, ram@zedat.fu-berlin.de (Stefan Ram)
> wrote:
> 
>   <snip>
>>  However, in the Java world many deemed »+ ""« to be bad
>>  style because it does not express the intent of the
>>  programmer to convert something to a string but would
>>  mystify the reader. I do not share this point of view,
>>  however, because I think the intent of »+ ""« is clear.
> 
>   "" + x + 1
> makes it more obvious.

But this may lead to the wrong result.

Example:

x = "4";
y = + x + 2;

Result: "6"

x = "4";
y = "" + x + 2;

Result: "42"

In general: if it is important to get a value as number, you should
always create a numeric value from it using Number() and never rely on
the expression itself.

-- 
Arno Welzel
https://arnowelzel.de