I have an array of nested arrays and need to join them using the " / ", " or " and " and " text.
If within the same array then joined by " and ".
If sibling then joins by " or ".
Otherwise, join by " \ ".
Example 1:-
The output should be:
ARTH 332 / HIST 364 and HIST 365
[
[
[
"ARTH 332"
]
]
[
[
"HIST 364"
"HIST 365"
]
]
]
Example 2:-
The output should be:
BUS 300 / BUS 310 / BUS 330 / MKT 300 / ACCT 301 / MGMT 362 / BUS 345 or BUS 340
[
[
[
"BUS 300"
]
]
[
[
"BUS 310"
]
]
[
[
"BUS 330"
]
]
[
[
"MKT 300"
]
]
[
[
"ACCT 301"
]
]
[
[
"MGMT 362"
]
]
[
[
"BUS 345"
]
[
"BUS 340"
]
]
]
Simply iterate over the array and differentiate between the three cases for and, or and nothing. Finally join the result on /. I have also added , to make the given data a valid array.
let y = [
[
["ARTH 332"]
],
[
["HIST 364", "HIST 365"]
]
]
let x = [
[
["BUS 300"]
],
[
["BUS 310"]
],
[
["BUS 330"]
],
[
["MKT 300"]
],
[
["ACCT 301"]
],
[
["MGMT 362"]
],
[
["BUS 345"],
["BUS 340"]
]
];
let z = [
[
["BUS 300"]
],
[
["BUS 310"]
],
[
["BUS 330"]
],
[
["MKT 300"]
],
[
["ACCT 301"]
],
[
["MGMT 362"]
],
[
["BUS 345"],
["BUS 340","BUS 340"]
]
]
function transform(a) {
let length = a.length;
let result = [];
for (let i = 0; i < length; i++) {
if (a[i].length > 1) {
result.push(
a[i].map(e=>e.join(" and ")).join(" or ")
)
} else if (a[i][0].length > 1) {
result.push(a[i][0].join(" and "))
} else {
result.push(a[i][0]);
}
}
return result.join(" / ");
}
console.log(transform(y));
console.log(transform(x));
console.log(transform(z));