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Execute command on all files in a directory
... touch foo.txt bar.txt baz.txt
el@defiant ~/foo $ for i in *.txt; do echo "hello $i"; done
hello bar.txt
hello baz.txt
hello foo.txt
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How can I make one python file run another? [duplicate]
...n
import yoursubfile
Put this in yoursubfile.py
#!/usr/bin/python
print("hello")
Run it:
python main.py
It prints:
hello
Thus main.py runs yoursubfile.py
There are 8 ways to answer this question, A more canonical answer is here: How to import other Python files?
...
Are string.Equals() and == operator really same? [duplicate]
...cts:
// Avoid getting confused by interning
object x = new StringBuilder("hello").ToString();
object y = new StringBuilder("hello").ToString();
if (x.Equals(y)) // Yes
// The compiler doesn't know to call ==(string, string) so it generates
// a reference comparision instead
if (x == y) // No
stri...
How can I redirect the output of the “time” command?
...e &> please, where can I learn about these?
– hello_there_andy
Feb 20 '17 at 23:47
3
@hell...
Checkout another branch when there are uncommitted changes on the current branch
...tted version of that file), then you can switch freely.
Example:
$ echo 'hello world' > file.txt
$ git add file.txt
$ git commit -m "adding file.txt"
$ git checkout -b experiment
$ echo 'goodbye world' >> file.txt
$ git add file.txt
$ git commit -m "added text"
# experiment now cont...
How to split a string in Haskell?
... the build-depends list in your cabal file, e.g. if your project is called hello, then in the hello.cabal file below the executable hello line put a line like ` build-depends: base, split` (note two space indent). Then build using the cabal build command. Cf. haskell.org/cabal/users-guide/…
...
What is an optional value in Swift?
...re's an associated value which, in the example above, would be the String "Hello". An optional uses Generics to give a type to the associated value. The type of an optional String isn't String, it's Optional, or more precisely Optional<String>.
Everything Swift does with optionals is magic to ...
Android NDK C++ JNI (no implementation found for native…)
...mple under apps in ndk:
https://github.com/android/ndk-samples/blob/master/hello-gl2/app/src/main/cpp/gl_code.cpp
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Do I need to manually close an ifstream?
...nclude <fstream>
using std::ofstream;
int main() {
ofstream ofs("hello.txt");
ofs << "Hello world\n";
return 0;
}
writes file contents. But:
#include <stdlib.h>
#include <fstream>
using std::ofstream;
int main() {
ofstream ofs("hello.txt");
ofs << "Hel...
How to use OpenSSL to encrypt/decrypt files?
...applications.
Do this:
openssl enc -aes-256-cbc -pbkdf2 -iter 20000 -in hello -out hello.enc -k meow
openssl enc -d -aes-256-cbc -pbkdf2 -iter 20000 -in hello.enc -out hello.out
Note: Iterations in decryption have to be the same as iterations in encryption.
Iterations have to be a minimum of 1...