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Explaining Python's '__enter__' and '__exit__'
...mponents self object,which I want to expose to user like in with open(abc.txt, 'r') as fin: content = fin.read()
– ViFI
Jul 11 '16 at 10:37
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Extract file basename without path and extension in bash [duplicate]
...command. Instead, you could use the following commands:
$ s=/the/path/foo.txt
$ echo "${s##*/}"
foo.txt
$ s=${s##*/}
$ echo "${s%.txt}"
foo
$ echo "${s%.*}"
foo
Note that this solution should work in all recent (post 2004) POSIX compliant shells, (e.g. bash, dash, ksh, etc.).
Source: Shell Comma...
Bypass confirmation prompt for pip uninstall
...ackage1 package2 package3
or from file
pip uninstall -y -r requirements.txt
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Convert .pem to .crt and .key
...bit of data to encrypt:
Example file :
echo 'too many secrets' > file.txt
You now have some data in file.txt, lets encrypt it using OpenSSL and
the public key:
openssl rsautl -encrypt -inkey public.pem -pubin -in file.txt -out file.ssl
This creates an encrypted version of file.txt calling it...
PHP json_encode encoding numbers as strings
...ray( 'foo' => 1, 'bar' => 2, 'baz' => 'Hello, world');
$json_obj_txt = json_encode(new testclass());
$json_arr_txt = json_encode($testarr);
echo "<p>Object encoding:</p><pre>" . $json_obj_txt . "</pre>";
echo "<p>Array encoding:</p><pre>" . $json_...
How do I use Ruby for shell scripting?
...ding current dir.
#=> array of relative names
File.expand_path('~/file.txt') #=> "/User/mat/file.txt"
File.dirname('dir/file.txt') #=> 'dir'
File.basename('dir/file.txt') #=> 'file.txt'
File.join('a', 'bunch', 'of', 'strings') #=> 'a/bunch/of/strings'
__FILE__ #=> the name of the...
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...
write-host "hello"
Now run in PowerShell:
PS> .\a.ps1 > someFile.txt
hello
PS> type someFile.txt
PS>
As seen, you can't redirect them into a file. This maybe surprising for someone who are not careful.
But if switched to use write-output instead, you'll get redirection working as...
C# Stream流使用总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...盘上的文件中读取内容：
FileStream file = File.Open(@"F:\file.txt", FileMode.Open); //初始化文件流
byte[] array = new byte[file.Length];//初始化字节数组
file.Read(array, 0, array.Length);//读取流中数据把它写到字节数组中
file.Close();//关闭流
string str...
How do I read the first line of a file using cat?
...
You don't, use head instead.
head -n 1 file.txt
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What is the difference between Class.getResource() and ClassLoader.getResource()?
...he following are basically equivalent:
foo.bar.Baz.class.getResource("xyz.txt");
foo.bar.Baz.class.getClassLoader().getResource("foo/bar/xyz.txt");
And so are these (but they're different from the above):
foo.bar.Baz.class.getResource("/data/xyz.txt");
foo.bar.Baz.class.getClassLoader().getResou...