parseInt vs unary plus, when to use which?

Question

What are the differences between this line:

var a = parseInt(\"1\", 10); // a === 1

and this line

var a = +\"1\"; // a ===          


        

Answer 1

Be carefull, parseInt is faster than + unary operator in Node.JS, it's false that + or |0 are faster, them are faster only for NaN elements.

Check this out:

var arg=process.argv[2];

rpt=20000;
mrc=1000;

a=[];
b=1024*1024*1024*1024;
for (var i=0;i