Buffer的核心作用是用来缓冲，字面意思缓慢冲击。 比如你每秒要写100次硬盘，对系统冲击很大，浪费了大量时间忙着写处理，用个buffer缓冲区暂存起来，变成每秒要写10次硬盘，对系统冲击极大程度缓解了，因为写入效率变高了。

Here, the buffer array is used to store the data read by read (2) until it's written; then the buffer is re-used. There are more complicated buffer schemes used, for example a circular buffer, where some finite number of buffers are used, one after the next; once the buffers are all full, the index "wraps around" so that the first one is re-used.

Jan 31, 2017 · I have a JSON object and I'm converting it to a Buffer and doing some process here. Later I want to convert the same buffer data to convert to valid JSON object. I'm working on Node V6.9.1 Below ...

The buffer in this case is a sub-string, starting at position 6 with length 5, and it doesn't take extra storage space - it references a slice of the string. This isn't very useful for short strings like this, but it can be necessary when using large amounts of data.

Aug 9, 2021 · It turns out that there is third-party plugin that provides all node.js polyfills (not just Buffer) out of the box: node-polyfill-webpack-plugin. It brings all polyfills as its own dependancies, so you should use excludeAliases config property …

PL/SQL: numeric or value error: character string buffer too small is due to the fact that you declare a string to be of a fixed length (say 20), and at some point in your code you assign it a value whose length exceeds what you declared.

The Buffer constructor is a global object, so no require is needed. Buffers created with strings can take an optional encoding parameter to specify what encoding the string is in.

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Jan 11, 2013 · I wrote a pretty simple function that downloads an image from a given URL, resize it and upload to S3 (using 'gm' and 'knox'), I have no idea if I'm doing the reading of a stream to a buffer correc...

Do you need a circular buffer or a queue? The required operations make it sound like queue. I admit that with the requirement of a fixed size using a circular buffer make sense, but I'm not sure the question title reflects your actual question.