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29 lines
1.8 KiB
Markdown
29 lines
1.8 KiB
Markdown
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# bom
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## strip UTF-8 byte order marks
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[](https://godoc.org/github.com/spkg/bom)
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[](https://travis-ci.org/spkg/bom)
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[](https://ci.appveyor.com/project/jjeffery/bom)
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[](https://raw.githubusercontent.com/spkg/bom/master/LICENSE.md)
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[](https://coveralls.io/github/spkg/bom?branch=master)
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[](http://goreportcard.com/report/spkg/bom)
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The `bom` package provides a convenient way to strip [UTF-8 byte order marks](https://en.wikipedia.org/wiki/Byte_order_mark#UTF-8)
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(BOM) from the beginning of a byte slice or an `io.Reader`.
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The Unicode Standard defines UTF-8 byte order marks as the byte sequence `0xEF,0xBB,0xBF`, but neither requires nor recommends their use.
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The Go standard library provides no support for UTF-8 byte order marks, and it looks like it never will. To quote Andy Balholm in the
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discussion on this issue at https://groups.google.com/forum/#!topic/golang-nuts/OToNIPdfkks
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> The Go team includes the original designers of UTF-8, and they consider BOMs an aBOMination.
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They are reluctant to do anything to make life easier for people who use BOMs. :-)
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> (Although they did make the compiler accept source files with BOMs, if I remember right.)
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In the same discussion thread another participant makes the comment that it should not be difficult to write
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an `io.Reader` that eats the BOM.
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It isn't difficult, and here is one simple implementation.
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