comparison check

by bhupendra negi

JavaScript

var a ;
if ( a != undefined || a!= null)
{
    console.log("value there");
}
else { console.log("no value");} 

/* above comparison can be reduced to below */

if(a)
{
    console.log("value a there"); 
}
else { console.log("no a value");}

/****  ==== better than == check                        ******/
var a = 10
if ( a == "10" ) console.log("string value check");
if ( a !== "10") console.log("better check");