请用nodejs写两个函数,第一个函数可以把一段存在若干个跳转指令的文本用一个对象来描述。第二个函数可以把这个对象转回来原来的文本
时间: 2023-05-22 22:03:53 浏览: 70
可以使用以下代码实现:
第一个函数:
```
function parseText(text) {
const jumpRegex = /jump to (\d+)/g; // 匹配跳转指令
let obj = {text: text, jumps: {}};
let lastIndex = 0;
while (match = jumpRegex.exec(text)) {
let jumpIndex = parseInt(match[1]);
obj.jumps[match.index - lastIndex] = jumpIndex; // 记录跳转指令位置
lastIndex = match.index;
}
return obj;
}
```
第二个函数:
```
function unparseText(obj) {
let newText = "";
let lastIndex = 0;
for (let jumpIndex in obj.jumps) {
newText += obj.text.slice(lastIndex, jumpIndex) + "jump to " + obj.jumps[jumpIndex];
lastIndex = jumpIndex;
}
newText += obj.text.slice(lastIndex);
return newText;
}
```
对于输入文本 "this is a text with jump to 2 and jump to 5", `parseText` 函数会返回如下对象:
```
{
text: "this is a text with jump to 2 and jump to 5",
jumps: {
20: 2,
31: 5
}
}
```
对于以上对象, `unparseText` 函数会返回原始文本 "this is a text with jump to 2 and jump to 5"。
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