Recently, I have written this function for an OP:
$.prototype.reduce = function reduce(obj1, obj2) {
for (var k in obj2) {
if (obj1.hasOwnProperty(k) && obj2.hasOwnProperty(k)) {
if (typeof obj1[k] == "object" && typeof obj2[k] == "object") {
reduce(obj1[k], obj2[k]);
}
else delete obj1[k];
}
}
}
This function uses the feature of named functions expressions to make use of recurrence. I am now wondering, how to accomplish the same behavior using the new arrow function, as they are per definition always anonymous.
$.prototype.reduce = (obj1, obj2) => {
for (var k in obj2) {
if (obj1.hasOwnProperty(k) && obj2.hasOwnProperty(k)) {
if (typeof obj1[k] == "object" && typeof obj2[k] == "object") {
XXXX }
else delete obj1[k];
}
}
}
In place of XXX, I would have the following ideas:
1. arguments.callee(obj1[k], obj2[k]);(obviously deprecated)
2. $.reduce(obj1[k], obj2[k]) (calling the function variable itself - will fail for self-invoking function expressions)
3. Keep using "classical" function expression
Are there more approaches I missed? Which is the best way to use recurrence in double arrow functions?
