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@tolumide-ng
Created March 19, 2021 10:57
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Get the difference between two deeply nested Objects in javascript
// this comparison would not work for function and symbol comparisons
// this would only work best for compared objects that do not belong to same address in memory
// Returns true if there is no difference, and false otherwise
export const isObjNotSame = (obj1, obj2) => {
if (typeof obj1 !== "object" && obj1 !== obj2) {
return false;
}
if (typeof obj1 !== "object" && typeof obj2 !== "object" && obj1 === obj2) {
return true;
}
if (typeof obj1 === "object" && typeof obj2 === "object") {
if (Array.isArray(obj1) && Array.isArray(obj2)) {
if (obj1.length === obj2.length) {
if (obj1.length === 0) {
return true;
}
const firstElemType = typeof obj1[0];
if (typeof firstElemType !== "object") {
const confirmSameType = currentType =>
typeof currentType === firstElemType;
const checkObjOne = obj1.every(confirmSameType);
const checkObjTwo = obj2.every(confirmSameType);
if (checkObjOne && checkObjTwo) {
// they are primitves, we can therefore sort before and compare by index
// use number sort
// use alphabet sort
// use regular sort
if (firstElemType === "string") {
obj1.sort((a, b) => a.localeCompare(b));
obj2.sort((a, b) => a.localeCompare(b));
}
obj1.sort((a, b) => a - b);
obj2.sort((a, b) => a - b);
let equal = true;
obj1.map((element, index) => {
if (!isObjSame(element, obj2[index])) {
equal = false;
}
});
return equal;
}
if (
(checkObjOne && !checkObjTwo) ||
(!checkObjOne && checkObjTwo)
) {
return false;
}
if (!checkObjOne && !checkObjTwo) {
for (let i = 0; i <= obj1.length; i++) {
const compareIt = isObjSame(obj1[i], obj2[i]);
if (!compareIt) {
return false;
}
}
return true;
}
// if()
}
const newValue = isObjSame(obj1, obj2);
return newValue;
} else {
return false;
}
}
if (!Array.isArray(obj1) && !Array.isArray(obj2)) {
let equal = true;
if (obj1 && obj2) {
const allKeys1 = Array.from(Object.keys(obj1));
const allKeys2 = Array.from(Object.keys(obj2));
if (allKeys1.length === allKeys2.length) {
allKeys1.sort((a, b) => a - b);
allKeys2.sort((a, b) => a - b);
allKeys1.map((key, index) => {
if (
key.toLowerCase() !== allKeys2[index].toLowerCase()
) {
equal = false;
return;
}
const confirmEquality = isObjSame(obj1[key], obj2[key]);
if (!confirmEquality) {
equal = confirmEquality;
return;
}
});
}
}
return equal;
// return false;
}
}
};
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