Convert Nested If Statements To More Elegant Switch?

how can i convert this nested if statement to something more readable and 'elegant'? if(speed==0){ othvalue=0; }else { if(speed>value1864cmn){

Solution 1:

You can use "match" construct:

var othvalue = (speed == 0) ? 0 
             : (speed <= 10) ? 10
             : (speed <= 20) ? 20
             : (speed <= 30) ? 30
             : 40;

Solution 2:

You don't need to nest this, nor convert it to a switch statement. Just put the if right next to the else.

For instance:

if(speed==0){
    othvalue=0;
} elseif(speed>value1864cmn){
    othvalue=value1864cmn;
} elseif {
...

Solution 3:

if (speed == 0) {
    othvalue = 0;
} elseif (speed > value1864cmn) {
    othvalue = value1864cmn;
} elseif (speed > value1746cmn) {
    othvalue = value1746cmn;
} elseif (speed > value1628cmn) {
    othvalue = value1628cmn;
} elseif (speed > value1510cmn) {
    othvalue = value1510cmn;
} elseif (speed > value1392cmn) {
    othvalue = value1392cmn;
} elseif (speed > value1274cmn) {
    othvalue = value1274cmn;
} elseif (speed > value1156cmn) {
    othvalue = value1156cmn;
} elseif (speed > value1038cmn) {
    othvalue = value1038cmn;
} elseif (speed > value920cmn) {
    othvalue = value920cmn;
};

Solution 4:

if (speed == 0) {
    othvalue = 0;
} else {
    var values = [
        value1746cmn, value1628cmn, value1510cmn, value1392cmn, value1274cmn,
        value1156cmn, value1038cmn, value920cmn
    ];
    for (var i in values) {
        if (speed > values[i]) {
            othvalue = values[i];
            break;
        }
    }
}

Solution 5:

// I don't know about elegant, but stepping through an array is pretty quick.

functionsetSpeedValue(speed){varL=9,values= [0, 920, 1038, 1156, 1274, 1392, 1510, 1628, 1746, 1864];while(values[L]>speed)--L;return'value'+values[L]+'cmn';}alert(setSpeedValue(1040))