Comment on page
I/O Expressions
A set of expressions related to input/output using files, streams, readers and sockets.
Some of these expressions are quite advanced and may be dangerous for beginners.
Accessing files can be quite slow as it relies on the machine's file system.
To avoid the program slowing down it may be preferable to access files on a background process.
[a] new file at %String%Creates a new file at the given path. Returns that file object.
[the] file at %String%Retrieves the existing file at the given path. Returns that file object. This may be
null if the file does not exist.%File% is [a] fileWhether the file is a file (not a folder.)
%File% is [a] folderWhether the file is a folder (not a file.)
set {file} to a new file at "test.txt"
set {file} to the file at "test.txt"
assert {file} is a file
Property | Description |
|---|---|
reader | The file's input stream. |
writer | The file's output stream. |
contents | The file's string contents. |
name | The file name. |
path | The file path. |
set {file} to a new file at "test.txt"
assert name of {file} is "test.txt"
set the contents of {file} to "hello there"
assert the contents of {file} is "hello there"
Property | Description |
|---|---|
all | The input stream's entire contents. |
line | The input stream's next line. |
set {file} to a new file at "test.txt"
set {writer} to writer of {file}
write "general kenobi" to {writer}
close {writer} // make sure to close streams when finished
set {reader} to reader of {file}
set {line} to line of {reader}
assert {line} is "general kenobi"
close {reader} // make sure to close streams when finished
Last modified 1yr ago