我试图用递归函数找到任何和所有图像任何深度的任何对象,但正如预期的那样,它会在某些应用程序中给出一个超出最大调用堆栈大小的错误。解决方案here表示将递归函数包装在setTimeout
中但是看起来该函数不再起作用了。
const resultsReg = []
const resultsTimeout = []
const obj = {
key : {
foo: 'bar.jpg'
}
}
function findImages(object, results) {
for (var key in object) {
if (typeof object[key] === 'string') {
if (object[key].match(/\.(jpg)$/i) && !results.includes(object[key]) && results.length < 9) results.push(object[key]);
}
else if (typeof object[key] === 'object') {
findImages(object[key], results); // this works, but in some applications will give Maximum call stack size exceeded error
}
}
}
function findImagesTimeout(object, results) {
for (var key in object) {
if (typeof object[key] === 'string') {
if (object[key].match(/\.(jpg)$/i) && !results.includes(object[key]) && results.length < 9) results.push(object[key]);
}
else if (typeof object[key] === 'object') {
setTimeout(function() {
findImagesTimeout(object[key], results) // this fails
}, 0)
}
}
}
findImages(obj, resultsReg)
findImagesTimeout(obj, resultsTimeout)
console.log(resultsReg)
console.log(resultsTimeout)
输出:
[ 'bar.jpg' ]
[]
我做错了吗?