Go Package os: Difference between revisions
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| Line 14: | Line 14: | ||
bs, err := os.ReadFile("/Users/ovidiu/tmp/test.txt") | bs, err := os.ReadFile("/Users/ovidiu/tmp/test.txt") | ||
</syntaxhighlight> | </syntaxhighlight> | ||
<code>os.ReadFile</code> closes the file after use. | |||
==Write with <tt>WriteFile()</tt>== | ==Write with <tt>WriteFile()</tt>== | ||
To write in-memory data into a file: | To write in-memory data into a file: | ||
| Line 20: | Line 21: | ||
err := os.WriteFile("/Users/ovidiu/tmp/test2.txt", []byte(s), 0777) | err := os.WriteFile("/Users/ovidiu/tmp/test2.txt", []byte(s), 0777) | ||
</syntaxhighlight> | </syntaxhighlight> | ||
<code>os.WriteFile</code> closes the file after use. | |||
=TO DEPLETE= | =TO DEPLETE= | ||
Revision as of 18:28, 25 August 2023
External
Internal
Overview
Reading and Writing an Entire File in/from Memory
Read with ReadFile()
To read the content of an entire file into a byte slice:
bs, err := os.ReadFile("/Users/ovidiu/tmp/test.txt")
os.ReadFile closes the file after use.
Write with WriteFile()
To write in-memory data into a file:
s := "This\nis multi-line\nfile\ncontent\n"
err := os.WriteFile("/Users/ovidiu/tmp/test2.txt", []byte(s), 0777)
os.WriteFile closes the file after use.
TO DEPLETE
External
Internal
Functions
os.Open()
Works with files and directories.
os.Create()
os.File
os.File Methods
FileInfo
FileInfo Methods
- Size()
os.Args
os.Args is a string slice that holds the command-line arguments, starting with the program name. For more details on how to use see: