In Javascript,
hello += ' world'
// is shorthand for
hello = hello + ' world'
Is there a shorthand operator for the opposite direction?
hello = ' world' + hello
I tried hello =+ ' world'
but it did not work: it just typecast ' world'
into NaN
and then assigned it to hello
.
There is not really a shorthand for what you are describing.
An alternative approach would be to use String's concat
function:
var hello = 'hello';
var reverse = 'world '.concat(hello);
Is there a shorthand operator for the opposite direction?
No, all JavaScript compound assignment operators take the target as the left-hand operand.
Just use the hello = ' world' + hello;
statement that you had. If you're doing this repetively, consider using an array as a buffer to which you can prepend by the unshift
method .
Javascript doesn't have 'reverse' operator for strings, but there is Array.reverse()
function which can help you in such cases:
var hello = "hello";
hello = (hello + ",world, beautiful").split(",").reverse().join(' ');
console.log(hello); // beautiful world hello
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