I have an array such as:
[16, 20, 1, 4, 6, 8, 9, 22, 18, 14, 13, 12]
That I would like split into 6 different arrays based on ranges 1-4, 5-8, 9-12, 13-16, 17-20, 21-24.
What is the simplest way to do this with javascript?
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Define "simplest." Simple to read and understand? Least amount of code? Something else?TheJim01– TheJim012017-02-07 20:24:36 +00:00Commented Feb 7, 2017 at 20:24
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what is the type of those ranges ? Strings, numbers? Show the expected resultRomanPerekhrest– RomanPerekhrest2017-02-07 20:25:05 +00:00Commented Feb 7, 2017 at 20:25
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Most readable/efficient in the least amount of lines.JordanBarber– JordanBarber2017-02-07 20:25:13 +00:00Commented Feb 7, 2017 at 20:25
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3 Answers
You could use an interval for assigning the numbers to a specific slot.
var array = [16, 20, 1, 4, 6, 8, 9, 22, 18, 14, 13, 12],
interval = 4,
result = array.reduce(function (r, a) {
var slot = Math.floor((a - 1) / interval);
(r[slot] = r[slot] || []).push(a);
return r;
}, []);
console.log(result);1 Comment
Nina Scholz
@codesmarter, the interval is from the first (and for all other) range
1-4 four. this value is used to calculate the interval of a given number for adding to the array.The solution using Array.prototype.filter() function:
var list = [16, 20, 1, 4, 6, 8, 9, 22, 18, 14, 13, 12], i
result = [];
// considering ranges `1-4, 5-8, 9-12, 13-16, 17-20, 21-24`
for (i = 1; i < 24; i+= 4) {
result.push(list.filter(function(d){
return ((i+4 > d) && d >= i); // check if the number between lower and upper bound
}));
}
console.log(result);
Comments
Simplest answer:
var numbers = [16, 20, 1, 4, 6, 8, 9, 22, 18, 14, 13, 12];
var array1 = []; // range 1-4
var array2 = []; // range 5-8
for(var i=0; i< numbers.length; i++) {
if(numbers[i]>= 1 && numbers[i] <= 4) {
array1[i] = numbers[i]
} else if(numbers[i]>= 5 && numbers[i] <= 8) {
array2[i] = numbers[i]
}
//... continue for remaining ranges
}
