bc518174
 王天杨
提交两个项目文件
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export function shallowEqual(objA, objB, compare, compareContext) {
let compareResult = compare ? compare.call(compareContext, objA, objB) : void 0;
if (compareResult !== void 0) {
return !!compareResult;
}
if (objA === objB) {
return true;
}
if (typeof objA !== 'object' || !objA || typeof objB !== 'object' || !objB) {
return false;
}
const keysA = Object.keys(objA);
const keysB = Object.keys(objB);
if (keysA.length !== keysB.length) {
return false;
}
const bHasOwnProperty = Object.prototype.hasOwnProperty.bind(objB);
// Test for A's keys different from B.
for(let idx = 0; idx < keysA.length; idx++){
const key = keysA[idx];
if (!bHasOwnProperty(key)) {
return false;
}
const valueA = objA[key];
const valueB = objB[key];
compareResult = compare ? compare.call(compareContext, valueA, valueB, key) : void 0;
if (compareResult === false || compareResult === void 0 && valueA !== valueB) {
return false;
}
}
return true;
}
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