Read a specific line from a file: Difference between revisions
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puts [getNthLineFromFile example.txt 7]</lang>
Where it is necessary to provide very fast access to lines of text, it becomes sensible to create an index file describing the locations of the starts of lines so that the reader code can <code>seek</code> directly to the right location. This is rarely needed, but can occasionally be helpful.
=={{header|TUSCRIPT}}==
<lang tuscript>
$$ MODE TUSCRIPT
file="lines.txt"
ERROR/STOP OPEN (file,READ,-std-)
line2fetch=7
--> solution 1
ACCESS file: READ/RECORDS/UTF8 $file s,line
LOOP n=1,99
READ/NEXT/EXIT file
IF (n==line2fetch) PRINT line
ENDLOOP
ENDACCESS file
--> solution 2
line1to7=FILE (file,#line2fetch)
line=SELECT (line1to7,#line2fetch)
PRINT line
</lang>
Output:
<pre>
line7
line7
</pre>
[[Category:File handling]]
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