I am trying to assign a color blue for these values of i: 3,4,22,24
right now my code is as follows
JS(paste0('function(z, i) { return i > 2 && i < 5 || i > 21 && i < 24 ? "blue" : "grey"; }'))
Is there a way to accomplish the same using in operator , something like
JS(paste0('function(z, i) { return i in(3,4,22,23) ? "blue" : "grey"; }'))
Thanks in advance.
Yes. This way:
JS(paste0('function(z, i) { return [3,4,22,23].indexOf(i) > -1 ? "blue" : "grey"; }'))
[].includes() would look more elegant
You can use Array.prototype.indexOf() to see if an item is a in an array. This will give -1 if the item is not in the array, or the index if it's found. Using the ~ bitshift operator we are shifting the binary -1 forward to represent false if the item is not in the given array.
function JSpaste0(z, i) { return ~[3,4,22,23].indexOf(i) ? "blue" : "grey"; }
console.log(
JSpaste0(null, 4), // blue
JSpaste0(null, 66) // grey
)Yes, you could use in operator with an appropriate object.
JS(paste0('function(z, i) { return i in { 3: 1, 4: 1, 22: 1, 23: 1 } "blue" : "grey"; }'))
Solution 1 - I'd like to state that this is not supported by Internet Explorer or Opera, However it is compatible with all other popular browsers. Check MDN for further details regarding compatibility.
JS(paste0('function(z, i) { return [3,4,22,23].includes(i) ? "blue" : "grey"; }'))
solution 2 -
JS(paste0('function(z, i) { return [3,4,22,23].indexOf(i) > -1 ? "blue" : "grey"; }'))
inworks.