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How can I programmatically create a new cron job?
...t directory and they are interpreted as if they were crontabs, but with an extra field for the username, e.g.:
Filename: /etc/cron.d/per_minute
Content:
* * * * * root /bin/sh /home/root/script.sh
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How to loop through a HashMap in JSP?
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Just the same way as you would do in normal Java code.
for (Map.Entry<String, String> entry : countries.entrySet()) {
String key = entry.getKey();
String value = entry.getValue();
// ...
}
However, scriptlets (raw Java code in JSP files, those <% %> things) are considered...
What's the 'Ruby way' to iterate over two arrays at once
... more symmetrical. Probably not as fast, though, since you're creating the extra [a,b] array.
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How do I correctly clean up a Python object?
...it close() statement is that you have to worry about people forgetting to call it at all or forgetting to place it in a finally block to prevent a resource leak when an exception occurs.
To use the with statement, create a class with the following methods:
def __enter__(self)
def __exit__(self...
How to map and remove nil values in Ruby
... Why should it? The OP needs to strip nil entries, not empty strings. BTW, nil isn't the same as an empty-string.
– the Tin Man
Aug 14 '14 at 19:31
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What are the differences between WCF and ASMX web services?
...and understand for the most common web service needs). WCF adds a lot of extra complexity. While MS wants to replace ASMX with WCF, there seems to be a bit of resistance to it until MS makes the most common scenarios as simple as the old [Webmethod] way.
– mattmc3
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Requests — how to tell if you're getting a 404
...t requests.get to raise for any reason except a 2XX without having to make extra calls.
– Asfand Qazi
Jan 31 '19 at 12:12
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Python class inherits object
... so are numerous, to list some of them:
Support for descriptors. Specifically, the following constructs are made possible with descriptors:
classmethod: A method that receives the class as an implicit argument instead of the instance.
staticmethod: A method that does not receive the implicit ar...
Is there any haskell function to concatenate list with separator?
..."?"]
"is there such a function ?"
unlines works similarly, only that the strings are imploded using the newline character and that a newline character is also added to the end. (This makes it useful for serializing text files, which must per POSIX standard end with a trailing newline)
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Does Python have “private” variables in classes?
...ass variables. In Java, nothing prevents you from doing the same if you really want to - after all, you can always edit the source of the class itself to achieve the same effect. Python drops that pretence of security and encourages programmers to be responsible. In practice, this works very nicely...