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[chap-builtin-cmd.md] --raw-line slow but no EOF error #2434

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[chap-builtin-cmd.md] --raw-line slow but no EOF error #2434

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9 changes: 5 additions & 4 deletions doc/ref/chap-builtin-cmd.md
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Expand Up @@ -444,19 +444,20 @@ recommended:

---

This flag replaces shell's `IFS= read -r` idiom, reading one byte a time in an
unbuffered fashion:
This flag still reads one byte a time in an unbuffered fashion, like shell's
`IFS= read -r` idiom, but does not error upon input- or file-ending (EOF):

read --raw-line # unbuffered read of line, omitting trailing \n
read --raw-line (&x) # fills $x

read --raw-line --with-eol # include the trailing \n
read --raw-line --with-eol # include trailing \n if present

A loop over [io.stdin][] allows buffered reading of lines, which is faster.

[io.stdin]: chap-type-method.html#stdin

You may want to use `fromJson8()` or `fromJson()` after reading a line.
You may want to use `fromJson8()` or `fromJson()` after reading a line, or a
command splice `@(...)` to read and assign an entire list of Json-lines.

---

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