Merging Streams: Merging Text Files
Explore how to merge multiple text files into a single output file using Node.js streams. Understand handling the end event properly to avoid stream errors and learn techniques for controlled stream merging, including a line-by-line merging example with practical code.
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Merging is the opposite operation to forking and involves piping a set of Readable streams into a single Writable stream, as shown in the illustration given below.
Merging multiple streams into one is, in general, a simple operation; however, we have to pay attention to the way we handle the end event because piping using the default options (according to which {end:true}) causes the destination stream to end as soon as one of the sources ends. This can often lead to an error because the other active sources continue to write to an already terminated stream.
The solution to ...