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  • SharedArrayBuffer.prototype.slice()

    SharedArray Buffer.prototype.slice()方法返回一个新的SharedArrayBuffer,其内容是此SharedArrayBuffer从开始到结束的字节的副本,包括首尾,排他。如果 begin 或 end 为负值,则它引用数组末尾的索引,而不是开头的索引。此方法与Array.prototype.slice()具有相同的算法。

    语法

    slice()
    slice(begin)
    slice(begin, end)
    

    Parameters

    begin Optional

    Zero-based index at which to begin extraction.

    A negative index can be used, indicating an offset from the end of the sequence.slice(-2) extracts the last two elements in the sequence.

    If begin is undefined,slice begins from index 0.

    end Optional

    Zero-based index before which to end extraction.slice extracts up to but not including end.

    For example,slice(1,4) extracts the second element through the fourth element(elements indexed 1, 2, and 3).

    A negative index can be used, indicating an offset from the end of the sequence.slice(2,-1) extracts the third element through the second-to-last element in the sequence.

    If end is omitted,slice extracts through the end of the sequence(sab.byteLength).

    Return value

    A new SharedArrayBuffer containing the extracted elements.

    实例

    const sab = new SharedArrayBuffer(1024);
    sab.slice(); // SharedArrayBuffer { byteLength: 1024 }
    sab.slice(2); // SharedArrayBuffer { byteLength: 1022 }
    sab.slice(-2); // SharedArrayBuffer { byteLength: 2 }
    sab.slice(0, 1); // SharedArrayBuffer { byteLength: 1 }