Java put / putShort with JS

由 snon发布于 2020-05-23 23:07:57

Can someone tell me the equivalent of java put and putShort in JavaScript ?

int length = (bArr.length + 2) - 4;
ByteBuffer wrap = ByteBuffer.wrap(bArr);
wrap.order(ByteOrder.LITTLE_ENDIAN);
wrap.putShort(2, (short) length);
wrap.put(9, length);

对你的冷漠

2020-05-23 23:07:57

我认为您首先要寻找的是：

创建数组缓冲区：

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer

然后使用数据视图获取并设置它：

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/DataView

在dataview中，您可以控制字节顺序（大/小尾数）

And here is an example, getting binary representation of NaN in JS https://jsfiddle.net/ibowankenobi/h2r5ybfp/

!function(){
    var ab = new ArrayBuffer(8),
        dv = new DataView(ab);
  dv.setFloat64(0,NaN,false); //big endian by default
  document.body.textContent = Array.apply(null,Array(8))
    .map(function(d,i){
       return ("00000000" + dv.getUint8(i).toString(2)).slice(-8)
    }).join(" ");
}();

加载中…

2020-05-23 23:07:57

I believe you are looking for ByteBuffer#writeShort(value, offset=)

snon

这家伙很懒，什么都没留下

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