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 19:09, 5 May 2018
, 6 years agoAdded Kotlin
(Added Kotlin) |
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Line 1,622:
xyz:2d711642b726b04401627ca9fbac32f5c8530fb1903cc4db02258717921a4881:1003:1000:X Yz,Room 1003,(234)555-8913,(234)555-0033,xyz@rosettacode.org:/home/xyz:/bin/bash
</pre>
=={{header|Kotlin}}==
{{works with|Ubuntu 16.04}}
<lang scala>// Version 1.2.41
import java.io.File
class Record(
val account: String,
val password: String,
val uid: Int,
val gid: Int,
val gecos: List<String>,
val directory: String,
val shell: String
){
override fun toString() =
"$account:$password:$uid:$gid:${gecos.joinToString(",")}:$directory:$shell"
}
fun parseRecord(line: String): Record {
val fields = line.split(':')
return Record(
fields[0],
fields[1],
fields[2].toInt(),
fields[3].toInt(),
fields[4].split(','),
fields[5],
fields[6]
)
}
fun main(args: Array<String>) {
val startData = listOf(
"jsmith:x:1001:1000:Joe Smith,Room 1007,(234)555-8917,(234)555-0077,[email protected]:/home/jsmith:/bin/bash",
"jdoe:x:1002:1000:Jane Doe,Room 1004,(234)555-8914,(234)555-0044,[email protected]:/home/jdoe:/bin/bash"
)
val records = startData.map { parseRecord(it) }
val f = File("passwd.csv")
f.printWriter().use {
for (record in records) it.println(record)
}
println("Initial records:\n")
f.forEachLine {
println(parseRecord(it))
}
val newData = "xyz:x:1003:1000:X Yz,Room 1003,(234)555-8913,(234)555-0033,[email protected]:/home/xyz:/bin/bash"
val record = parseRecord(newData)
if (!f.setWritable(true, true)) {
println("\nFailed to make file writable only by owner\n.")
}
f.appendText("$record\n")
println("\nRecords after another one is appended:\n")
f.forEachLine {
println(parseRecord(it))
}
}</lang>
{{output}}
<pre>
Initial records:
jsmith:x:1001:1000:Joe Smith,Room 1007,(234)555-8917,(234)555-0077,[email protected]:/home/jsmith:/bin/bash
jdoe:x:1002:1000:Jane Doe,Room 1004,(234)555-8914,(234)555-0044,[email protected]:/home/jdoe:/bin/bash
Records after another one is appended:
jsmith:x:1001:1000:Joe Smith,Room 1007,(234)555-8917,(234)555-0077,[email protected]:/home/jsmith:/bin/bash
jdoe:x:1002:1000:Jane Doe,Room 1004,(234)555-8914,(234)555-0044,[email protected]:/home/jdoe:/bin/bash
xyz:x:1003:1000:X Yz,Room 1003,(234)555-8913,(234)555-0033,[email protected]:/home/xyz:/bin/bash
</pre>
{|class="wikitable" style="text-align: center; margin: 1em auto 1em auto;"
|+ Append Capabilities.
|-
!colspan=2| Data Representation
!rowspan=2| IO<BR>Library
!rowspan=2| Append<BR>Possible
!rowspan=2| Automatic<BR>Append
!rowspan=2| Multi-tasking<BR>Safe
|-
! In core || On disk
|-
| Class || Text file || JDK || ☑ || ☑ || ☑ (System dependent)
|}
=={{header|Mathematica}} / {{header|Wolfram Language}}==
| |||