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How to return a value from __init__ in Python?
...
f = Foo()
Gives this error:
Traceback (most recent call last):
File "test_init.py", line 5, in <module>
f = Foo()
TypeError: __init__() should return None, not 'int'
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Getting MAC Address
...= None
if if_ip == ip:
return if_mac
return None
Testing:
>>> mac_for_ip('169.254.90.191')
'2c:41:38:0a:94:8b'
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...
“Invalid form control” only in Google Chrome
...is:
<form>
<div style="display: none;">
<input name="test" type="text" required/>
</div>
<input type="submit"/>
</form>
solution to this problem will depend on how the site should work
for example if you don't want the form to submit unless this fie...
Is it possible to program iPhone in C++
... experienced C++ programmers to learn Objective-C? I managed to mash a few test apps together, but I find the syntax a little backwards and I am sure that I am doing things that lead to memory leaks etc just through lack of knowledge of Objective-C
– Lea Hayes
...
How to establish a connection pool in JDBC?
..." ); //loads the jdbc driver
cpds.setJdbcUrl( "jdbc:postgresql://localhost/testdb" );
cpds.setUser("swaldman");
cpds.setPassword("test-password");
// the settings below are optional -- c3p0 can work with defaults
cpds.setMinPoolSize(5);
cpds.setAcquireIncrement(5);
cpds.setMaxPoolSize(20);
// The ...
Shell - Write variable contents to a file
...me
if [ -f "$destdir" ]
then
echo "$var" > "$destdir"
fi
The if tests that $destdir represents a file.
The > appends the text after truncating the file. If you only want to append the text in $var to the file existing contents, then use >> instead:
echo "$var" >> "$destdi...
How do I move to end of line in Vim?
... use vim in standard terminal. Hope it will help someone.
For macOS users (tested on macbook pro 2018):
fn + ← - move to beginning line
fn + → - move to end line
fn + ↑ - move page up
fn + ↓ - move page down
fn + g - move the cursor to the beginning of the d...
Reusable library to get human readable version of file size?
...this "too small a task" were captured and encapsulated into a library with tests.
– fess .
Feb 27 '16 at 22:03
6
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How to remove application from app listings on Android Developer Console
...production mode but now i unpublished it and i want to publish it in alpha testers. when i tried this then production apk is publishing but not alpha, so how can i publish only alpha test release mode after publishing production apk?Is there any way to hide production apk and to publish alpha tester...
appending array to FormData and send via AJAX
...t in arr[] , why isn't arr[] redefined? arr[] is also a string . And while testing both neither arr nor arr[] was redefined in my case. I got multiple array in FormData with same key but different value. So i got arr with value 1 and another arr with value 2.
– Totoro
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