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Remove lines from a file: Difference between revisions
→{{header|Nim}}
Alextretyak (talk | contribs) (Added 11l) |
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(exit)
</lang>
=={{header|Nim}}==
<lang Nim>import sequtils, strutils
proc removeLines*(filename: string; start, count: Positive) =
# Read the whole file, split into lines but keep the ends of line.
var lines = filename.readFile().splitLines(keepEol = true)
# Remove final empty string if any.
if lines[^1].len == 0: lines.setLen(lines.len - 1)
# Compute indices and check validity.
let first = start - 1
let last = first + count - 1
if last >= lines.len:
raise newException(IOError, "trying to delete lines after end of file.")
# Delete the lines and write the file.
lines.delete(first, last)
filename.writeFile(lines.join())
=={{header|OCaml}}==
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