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can we use xpath with BeautifulSoup?
...xample I passed the response object directly to lxml, as having the parser read directly from the stream is more efficient than reading the response into a large string first. To do the same with the requests library, you want to set stream=True and pass in the response.raw object after enabling tra...
jQuery select all except first
...Because of the way jQuery selectors are evaluated right-to-left, the quite readable li:not(:first) is slowed down by that evaluation.
An equally fast and easy to read solution is using the function version .not(":first"):
e.g.
$("li").not(":first").hide();
JSPerf: http://jsperf.com/fastest-way-...
Pimpl idiom vs Pure virtual class interface
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I was searching an answer for the same question.
After reading some articles and some practice I prefer using "Pure virtual class interfaces".
They are more straight forward (this is a subjective opinion). Pimpl idiom makes me feel I'm writing code "for the compiler", not for t...
How can I convert a datetime object to milliseconds since epoch (unix time) in Python?
...pytz module to reliably convert local time to POSIX timestamp (unless OS already provides such db)
– jfs
May 15 '14 at 19:01
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How do I check if a given string is a legal/valid file name under Windows?
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I read the same article mentioned in this answer and found through experimentation that COM0 and LPT0 are also not allowed. @dlf this one works with filenames that begin with '.': ^(?!^(?:PRN|AUX|CLOCK\$|NUL|CON|COM\d|LPT\d)(?...
Hashset vs Treeset
...sal.
None of these implementations are synchronized. That is if multiple threads access a set concurrently, and at least one of the threads modifies the set, it must be synchronized externally.
LinkedHashSet is in some sense intermediate between HashSet and TreeSet. Implemented as a hash table with ...
How to use index in select statement?
...question you have to specify the DB you are using.
For MySQL, you want to read the Index Hint Syntax documentation on how to do this
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this.setState isn't merging states as I would expect
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@Madbreaks Ok, yes, upon re-reading the official docs I see that it is specified that you must use the function form of setState to reliably update state based on previous state. That said, I've never come across a problem to date if not trying to call...
What is the difference between concurrent programming and parallel programming?
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If you program is using threads (concurrent programming), it's not necessarily going to be executed as such (parallel execution), since it depends on whether the machine can handle several threads.
Here's a visual example. Threads on a non-threaded m...
How do I protect Python code? [closed]
...a criminal offense.
Since no technical method can stop your customers from reading your code, you have to apply ordinary commercial methods.
Licenses. Contracts. Terms and Conditions. This still works even when people can read the code. Note that some of your Python-based components may require...