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List goals/targets in GNU make that contain variables in their definition
...utput from make -pn (i.e. make --print-data-base --dry-run)? It prints out all the variables, rules, implicit rules and which commands will be run in laborious detail.
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Asynchronous method call in Python?
I was wondering if there's any library for asynchronous method calls in Python . It would be great if you could do something like
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How to deal with SettingWithCopyWarning in Pandas?
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The SettingWithCopyWarning was created to flag potentially confusing "chained" assignments, such as the following, which does not always work as expected, particularly when the first selection returns a copy. [see GH5390 and GH5597 for background discussion.]
df[df['A'] > 2...
XDocument or XmlDocument
...://somewhere.com";
XElement element = new XElement(ns + "elementName");
// etc
LINQ to XML also works really well with LINQ - its construction model allows you to build elements with sequences of sub-elements really easily:
// Customers is a List<Customer>
XElement customersElement = new XE...
What's the difference between libev and libevent?
...nc i/o scheduling, and both engages epoll on linux, and kqueue on FreeBSD, etc.
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How to import multiple .csv files at once?
...ariables but each from different times.
Is there a way in R to import them all simultaneously rather than having to import them all individually?
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Capture keyboardinterrupt in Python without try-except
...re some way in Python to capture KeyboardInterrupt event without putting all the code inside a try - except statement?
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Best way to make Django's login_required the default
...p, the vast majority of which requires a login to access. This means that all throughout our app we've sprinkled:
9 Answer...
How to work around the lack of transactions in MongoDB?
...SMS sending, which means it won't be logged, user balance won't be reduced etc.
The real problem here is the user can take advantage of race condition and send more messages than his balance allows. This also applies to RDBMS, unless you do SMS sending inside transaction with balance field locking ...
Join strings with a delimiter only if strings are not null or empty
...r(x => x)) removes all "falsy" values (nulls, undefineds, empty strings etc). If your definition of "empty" is different, then you'll have to provide it, for example:
[...].filter(x => typeof x === 'string' && x.length > 0)
will only keep non-empty strings in the list.
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