blocks|key|4524381|text|我也看到了这个无用的/误导性的nodejs错误消息，所以我在nodejs+github上预订了一个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4524382|RangeError:+Invalid+string+length+---+it+should+be+saying+Out+Of+Memory|offset|length|4524383|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/joyent/node/issues/14170^0|0|0|1Z|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I too have seen this unhelpful/misleading nodejs error message, so I booked an issue over at nodejs github

<a href="https://github.com/joyent/node/issues/14170" rel="noreferrer">RangeError: Invalid string length --- it should be saying Out Of Memory</a>

blocks|key|4524433|text|正如@sandeepanu所提到的，如果你想把一个巨大的数组串起来，there's+a+great+little+solution+by+@madhunimmo。一次只对一个元素进行字符串化：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4524434|let+out+=+"["+%2B+yourArray.map(el+=>+JSON.stringify(el)).join(",")+%2B+"]";|code-block|syntax|javascript|4524435|如果你想让一个对象具有大量的键/属性，那么你可以先对它使用Object.entries()，把它变成一个键/值对的数组：|style|CODE|4524436|let+out+=+"["+%2B+Object.entries(yourObject).map(el+=>+JSON.stringify(el)).join(",")+%2B+"]";|4524437|如果这仍然不起作用，那么您可能希望使用流方法，尽管您可以将数组分成多个部分并存储为多个jsonl+(每行一个对象)文件：|4524438|//+untested+code
let+numFiles+=+4;
for(let+i++=+0;+i+<+numFiles;+i%2B%2B)+{
++let+out+=+arr.slice((i/numFiles)*arr.length,+((i%2B1)/numFiles)*arr.length).map(el+=>+JSON.stringify(el)).join(",");
++//+add+your+code+to+store/save+`out`+here
}|4524439|一种流媒体方法(新的，目前只支持Chrome，但很可能会出现在其他浏览器上，甚至Deno和Node.js以这样或那样的形式)是使用File+System+Access+API。代码将如下所示：|4524440|//+untested+code
const+dirHandle+=+await+window.showDirectoryPicker();
const+fileHandle+=+await+dirHandle.getFileHandle('yourData.jsonl',+{+create:+true+});
const+writable+=+await+fileHandle.createWritable();
for(let+el+of+yourArray)+{
++await+writable.write(JSON.stringify(el)%2B"\n");
}
await+writable.close();|4524441|entityMap|0|LINK|mutability|MUTABLE|url|https://dev.to/madhunimmo/json-stringify-rangeerror-invalid-string-length-3977|1|https://web.dev/file-system-access/^0|Y|1A|0|0|0|T|G|0|0|17|5|0|0|1T|M|1|0|0^^$0|@$1|2|3|4|5|6|7|16|8|@]|9|@$A|17|B|18|1|19]]|C|$]]|$1|D|3|E|5|F|7|1A|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|1B|8|@$A|1C|B|1D|K|L]]|9|@]|C|$]]|$1|M|3|N|5|F|7|1E|8|@]|9|@]|C|$G|H]]|$1|O|3|P|5|6|7|1F|8|@$A|1G|B|1H|K|L]]|9|@]|C|$]]|$1|Q|3|R|5|F|7|1I|8|@]|9|@]|C|$G|H]]|$1|S|3|T|5|6|7|1J|8|@]|9|@$A|1K|B|1L|1|1M]]|C|$]]|$1|U|3|V|5|F|7|1N|8|@]|9|@]|C|$G|H]]|$1|W|3|-4|5|6|7|1O|8|@]|9|@]|C|$]]]|X|$Y|$5|Z|10|11|C|$12|13]]|14|$5|Z|10|11|C|$12|15]]]]

As mentioned by @sandeepanu, <a href="https://dev.to/madhunimmo/json-stringify-rangeerror-invalid-string-length-3977" rel="nofollow noreferrer">there's a great little solution by @madhunimmo</a> for if you're trying to stringify a huge array. Just stringify one element at a time:
<pre><code>let out = &quot;[&quot; + yourArray.map(el =&gt; JSON.stringify(el)).join(&quot;,&quot;) + &quot;]&quot;;
</code></pre>
If you're trying to stringify an object with a very large number of keys/properties, then you could just use <code>Object.entries()</code> on it first to turn it into an array of key/value pairs first:
<pre><code>let out = &quot;[&quot; + Object.entries(yourObject).map(el =&gt; JSON.stringify(el)).join(&quot;,&quot;) + &quot;]&quot;;
</code></pre>
If that still doesn't work, then you'll probably want to use a streaming approach, although you could slice your array into portions and store as multiple <code>jsonl</code> (one object per line) files:
<pre><code>// untested code
let numFiles = 4;
for(let i = 0; i &lt; numFiles; i++) {
 let out = arr.slice((i/numFiles)*arr.length, ((i+1)/numFiles)*arr.length).map(el =&gt; JSON.stringify(el)).join(&quot;,&quot;);
 // add your code to store/save `out` here
}
</code></pre>
One streaming approach (new, and currently only supported in Chrome, but will likely come to other browsers, and even Deno and Node.js in some form or another) is to use the <a href="https://web.dev/file-system-access/" rel="nofollow noreferrer">File System Access API</a>. The code would look something like this:
<pre><code>// untested code
const dirHandle = await window.showDirectoryPicker();
const fileHandle = await dirHandle.getFileHandle('yourData.jsonl', { create: true });
const writable = await fileHandle.createWritable();
for(let el of yourArray) {
 await writable.write(JSON.stringify(el)+&quot;\n&quot;);
}
await writable.close();
</code></pre>

blocks|key|4524470|text|我发现JSONStream是原生JSON.stringify的可靠替代品，它可以很好地处理大型对象。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4524471|var+fileSystem+=+require(+"fs"+);
var+JSONStream+=+require(+"JSONStream"+);
var+records+=+[
++++{+id:+1,+name:+"Terminator"+},
++++{+id:+2,+name:+"Predator"+},
++++{+id:+3,+name:+"True+Lies"+},
++++{+id:+4,+name:+"Running+Man"+},
++++{+id:+5,+name:+"Twins"+}
++++//+....+hundreds+of+thousands+of+records+....
];

var+transformStream+=+JSONStream.stringify();
var+outputStream+=+fileSystem.createWriteStream(+__dirname+%2B+"/data.json"+);
transformStream.pipe(+outputStream+);++++
records.forEach(+transformStream.write+);
transformStream.end();

outputStream.on(
++++"finish",
++++function+handleFinish()+{
++++++++console.log("Done");
++++}
);|code-block|syntax|javascript|4524472|取自here的示例代码。|offset|length|4524473|entityMap|0|LINK|mutability|MUTABLE|url|https://www.bennadel.com/blog/3232-parsing-and-serializing-large-objects-using-jsonstream-in-node-js.htm^0|0|0|2|4|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

I find JSONStream to be a reliable alternative to the native JSON.stringify that works well with large objects. For example:
<pre><code>var fileSystem = require( &quot;fs&quot; );
var JSONStream = require( &quot;JSONStream&quot; );
var records = [
 { id: 1, name: &quot;Terminator&quot; },
 { id: 2, name: &quot;Predator&quot; },
 { id: 3, name: &quot;True Lies&quot; },
 { id: 4, name: &quot;Running Man&quot; },
 { id: 5, name: &quot;Twins&quot; }
 // .... hundreds of thousands of records ....
];

var transformStream = JSONStream.stringify();
var outputStream = fileSystem.createWriteStream( __dirname + &quot;/data.json&quot; );
transformStream.pipe( outputStream ); 
records.forEach( transformStream.write );
transformStream.end();

outputStream.on(
 &quot;finish&quot;,
 function handleFinish() {
 console.log(&quot;Done&quot;);
 }
);
</code></pre>
Took the sample code from <a href="https://www.bennadel.com/blog/3232-parsing-and-serializing-large-objects-using-jsonstream-in-node-js.htm" rel="nofollow noreferrer">here</a>.

As the title implies I'm trying to stringify huge JavaScript Object with <a href="https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify"><code>JSON.stringify</code></a> in my Node.js app. The objects are - again - huge (tens of mega bytes), they don't contain any functions. I need to write the serialized objects to a file. What I'm getting now is this:

<pre><code>RangeError: Invalid string length
 at Object.stringify (native)
 at stringifyResult (/my/file.js:123:45) -&gt; line where I use JSON.stringify
</code></pre>

Any idea how to solve that issue?

JSON.stringify throws RangeError: Invalid string length for huge objects

JSON

正如标题所暗示的，我正试图在我的Node.js应用程序中使用将巨大的JavaScript对象串化。这些对象又是巨大的(数十兆字节)，它们不包含任何函数。我需要将序列化的对象写入一个文件。我现在得到的是：RangeError: Invalid string length  at Object.stringify (nat...

问JSON.stringify引发RangeError:大型对象的字符串长度无效
EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问JSON.stringify引发RangeError:大型对象的字符串长度无效EN

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问JSON.stringify引发RangeError:大型对象的字符串长度无效
EN