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Append values to a set in Python
...t;>> my_set = my_set | {2}
>>> my_set
{1, 2}
Or a shorter form using |=:
>>> my_set = {1}
>>> my_set |= {2}
>>> my_set
{1, 2}
Note: In versions prior to Python 2.7, use set([...]) instead of {...}.
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Developing C# on Linux
...# applications on Linux (Ubuntu). In particular, I have to develop Windows Forms applications.
6 Answers
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HttpServletRequest to complete URL
...e behavior and bugs in other parts of code that expect it in it's original form.
– Ken Blair
May 22 '12 at 16:53
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DateTime.ToString() format that can be used in a filename or extension?
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I would use the ISO 8601 format, without separators:
DateTime.Now.ToString("yyyyMMddTHHmmss")
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How to create a bash script to check the SSH connection?
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An even more concise form of #1: ssh -q user@downhost exit | echo $? pipe the connection result into echo
– philn5d
Nov 30 '18 at 21:22
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Use String.split() with multiple delimiters
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The string you give split is the string form of a regular expression, so:
private void getId(String pdfName){
String[]tokens = pdfName.split("[\\-.]");
}
That means to split on any character in the [] (we have to escape - with a backslash because it's specia...
How to find the foreach index?
...l management (increments, etc).
A foreach will give you your index in the form of your $key value, so such a hack shouldn't be necessary.
e.g., in a foreach
$index = 0;
foreach($data as $key=>$val) {
// Use $key as an index, or...
// ... manage the index this way..
echo "Index is ...
Disable Drag and Drop on HTML elements?
...n mouse down has too many side effects (for eg preventing focus/unfocus of form text inputs)
– Jecimi
Feb 18 '16 at 18:21
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How to create a file in Ruby
...ontent in one blast then close the file.
See the documentation for more information.
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Determine the number of NA values in a column
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This form, slightly changed from Kevin Ogoros's one:
na_count <-function (x) sapply(x, function(y) sum(is.na(y)))
returns NA counts as named int array
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