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'\" t
.\" Copyright (c) 2025 Bruce Hill
.\" All rights reserved.
.\"
.TH Path.by_line 3 2025-11-29 "Tomo man-pages"
.SH NAME
Path.by_line \- iterate by line
.SH LIBRARY
Tomo Standard Library
.SH SYNOPSIS
.nf
.BI Path.by_line\ :\ func(path:\ Path\ ->\ func(->Text?)?)
.fi
.SH DESCRIPTION
Returns an iterator that can be used to iterate over a file one line at a time, or returns none if the file could not be opened.
.SH ARGUMENTS
.TS
allbox;
lb lb lbx
l l l.
Name Type Description
path Path The path of the file.
.TE
.SH RETURN
An iterator that can be used to get lines from a file one at a time or none if the file couldn't be read.
.SH EXAMPLES
.EX
# Safely handle file not being readable:
if lines := (./file.txt).by_line()
for line in lines
say(line.upper())
else
say("Couldn't read file!")
# Assume the file is readable and error if that's not the case:
for line in (/dev/stdin).by_line()!
say(line.upper())
.EE
.SH SEE ALSO
.BR Tomo-Path (3)
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