Switch Case To/between

Is there a way in Javascript to compare one integer with another through switch case structures without using if statements? E.g. switch(integer) { case 1 to 10: break

Solution 1:

You can do some math manipulations.

switch(Math.ceil(integer/10)) {
    case1: // Integer is between 1-10break;
    case2: // Integer is between 11-20break;
    case3: // Integer is between 21-30break;
}

Solution 2:

There is a way, yes. I'm pretty sure I'd use an if/else structure in my own code, but if you're keen to use a switch the following will work:

switch(true) {
   caseinteger >= 1 && integer <= 10:
      // 1-10break;
   caseinteger >= 11 && integer <= 20: 
      // 11-20break;
   caseinteger >= 21 && integer <= 30:
      // 21-30break;
}

Of course if you wanted to avoid having to code >= && <= on every case you could define your own isInRange(num,min,max) type function to return a boolean and then say:

switch (true) {
   caseisInRange(integer,1,10):
      // 1-10break;
   // etc
}

Solution 3:

As stated in my comment, you can't do that. However, you could define an inRange function:

function inRange(x,min,max){returnmin<= x && x <=max;
}

and use it together with if - else if. That should make it quite easy to read:

if(inRange(integer, 1, 10)) {

}
else if(inRange(integer, 11, 20)) {

}

//...

Solution 4:

Posting for "cool" syntax :P

if( integer inrange(0,10)){}elseif( integer inrange(11,20)){}elseif( integer inrange(21,30)){}functionrange(min,max){
var o ={}, i ;
    for( i =min; i <=max; ++i ){
    o[i]=!0;
    }return o;
}