Check that file exists: Difference between revisions
→{{header|langur}}
(add RPL) |
Langurmonkey (talk | contribs) |
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Line 1,944:
[[io]]::fp.existsFile($dir2)
[[io]]::fp.closeFile($dir2)
</syntaxhighlight>
=={{header|langur}}==
The prop() function returns a hash of file/directory properties.
<syntaxhighlight lang="langur">val .printresult = impure fn(.file) {
write .file, ": "
if val .p = prop(.file) {
if .p'isdir {
writeln "is directory"
} else {
writeln "is file"
}
} else {
writeln "nothing"
}
}
.printresult("input.txt")
.printresult("/input.txt")
.printresult("docs")
.printresult("/docs")
</syntaxhighlight>
Line 3,211 ⟶ 3,232:
Since in Linux an ''empty'' directory has a size of 4K bytes, we check the number of files it contains to confirm that it's empty.
<syntaxhighlight lang="
for (name in ["input.txt", "`Abdu'l-Bahá.txt"]) {
Line 3,236 ⟶ 3,257:
docs directory exists and contains 0 files.
</pre>
=={{header|XPL0}}==
Attempting to open a non-existent file or directory will cause an error.
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