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Append a record to the end of a text file: Difference between revisions
Append a record to the end of a text file (view source)
Revision as of 14:23, 19 February 2024
, 3 months ago→{{header|Sidef}}
Jazzedpineda (talk | contribs) (Omitted EasyLang) |
imported>Regattaguru |
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| <tt>record</tt> || ASCII text || default <abbr title="run-time library">RTL</abbr> || ☑ || ☐ || ☐
|}
=={{header|FutureBasic}}==
<syntaxhighlight lang="futurebasic">
local fn AppendRecordToFile( pwStr as CFStringRef, url as CFURLRef ) as BOOL
ErrorRef err = NULL
BOOL success = YES
CFDataRef pwData = fn StringData( pwStr, NSUTF8StringEncoding )
FileHandleRef fh = fn FileHandleForWritingToURL( url, @err )
if ( err )
success = fn FileManagerFileExistsAtURL( url )
if success == NO then fn FileManagerCreateFileAtURL( url, pwData, NULL ) : success = YES : exit fn
end if
success = fn FileHandleSeekToEnd( fh, NULL, @err )
if success == NO then print fn ErrorLocalizedDescription( err ) : exit fn
success = fn FileHandleWriteData( fh, pwData, @err )
if success == NO then print fn ErrorLocalizedDescription( err ) : exit fn
success = fn FileHandleClose( fh, @err )
if success == NO then print fn ErrorLocalizedDescription( err ) : exit fn
end fn = success
local fn ReadFileRecords( url as CFURLRef )
ErrorRef err = NULL
CFDataRef pwData = fn DataWithContentsOfURL( url, NSDataReadingMappedIfSafe, @err )
if err then print fn ErrorLocalizedDescription( err ) : exit fn
print fn StringWithData( pwData, NSUTF8StringEncoding )
end fn
local fn ProcessRecords
BOOL success = NO
CFURLRef desktopURL = fn FileManagerURLForDirectory( NSDesktopDirectory, NSUserDomainMask )
CFURLRef url = fn URLByAppendingPathComponent( desktopURL, @"passwords.txt" )
CFArrayRef pwRecords = @[@"account:password:UID:GID:fullname,office,extension,homephone,email:directory:shell\n",¬
@"jsmith:x:1001:1000:Joe Smith,Room 1007,(234)555-8917,(234)555-0077,jsmith@rosettacode.org:/home/jsmith:/bin/bash\n",¬
@"jdoe:x:1002:1000:Jane Doe,Room 1004,(234)555-8914,(234)555-0044,jdoe@rosettacode.org:/home/jdoe:/bin/bash\n"]
NSUInteger i, count = len(pwRecords)
for i = 0 to count - 1
success = fn AppendRecordToFile( pwRecords[i], url )
if success then printf @"Record appended to file." else printf @"Failed to append record."
next
fn ReadFileRecords( url )
end fn
fn ProcessRecords
HandleEvents
</syntaxhighlight>
{{output}}
<pre>
Record appended to file.
Record appended to file.
Record appended to file.
account:password:UID:GID:fullname,office,extension,homephone,email:directory:shell
jsmith:x:1001:1000:Joe Smith,Room 1007,(234)555-8917,(234)555-0077,jsmith@rosettacode.org:/home/jsmith:/bin/bash
jdoe:x:1002:1000:Jane Doe,Room 1004,(234)555-8914,(234)555-0044,jdoe@rosettacode.org:/home/jdoe:/bin/bash
</pre>
=={{header|Go}}==
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=={{header|Java}}==
<syntaxhighlight lang="java">
import java.io.FileOutputStream;
import java.io.IOException;
</syntaxhighlight>
<syntaxhighlight lang="java">
void append(String path, byte[] data) throws IOException {
/* the second argument here is for appending bytes */
try (FileOutputStream output = new FileOutputStream(path, true)) {
output.write(data);
}
}
</syntaxhighlight>
<br />
An alternate implementation.
<syntaxhighlight lang="java">import static java.util.Objects.requireNonNull;
Line 4,363 ⟶ 4,436:
Note that flock uses advisory lock; some other program (if it doesn't use flock) can still unexpectedly write to the file.
=={{header|Swift}}==
<syntaxhighlight lang="swift">
import Foundation
func appendPasswd(
account: String,
passwd: String,
uid: Int,
gid: Int,
bio: String,
home: String,
shell: String
) {
let str = [
account,
passwd,
String(uid),
String(gid),
bio,
home,
shell
].joined(separator: ":").appending("\n")
guard let data = str.data(using: .utf8) else { return }
let url = URL(fileURLWithPath: "./passwd")
do {
if let fileHandle = try? FileHandle(forWritingTo: url) {
fileHandle.seekToEndOfFile()
fileHandle.write(data)
try? fileHandle.close()
} else {
try data.write(to: url)
}
} catch {
print(error)
}
}
</syntaxhighlight>
Usage:
<syntaxhighlight lang="swift">
appendPasswd(
account: "jsmith",
passwd:"x",
uid: 1001,
gid: 1000,
bio: "Joe Smith,Room 1007,(234)555-8917,(234)555-0077,jsmith@rosettacode.org",
home: "/home/jsmith",
shell: "/bin/bash"
)
</syntaxhighlight>
=={{header|Tcl}}==
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To append a record to an existing file in a CLI script, a little digging is required as the method to do this (''File.openWithFlags'') is currently undocumented. However, the following works fine.
<syntaxhighlight lang="
var records = [
| |||