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Does Python have “private” variables in classes?
...ecurity", they are API documentation, which can even be used by the IDE to guide you!
– PedroD
Oct 15 '15 at 11:45
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How to speed up insertion performance in PostgreSQL
...ht to the meat.
I dropped a primary key on the target table (which was a GUID) and my 30MI or rows happily flowed to their destination at a constant speed of less than 3sec per 100K.
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Node.js Best Practice Exception Handling
...was thrown that interrupts that flow.
Take a look at bluebird promises:
https://github.com/petkaantonov/bluebird
Note that I haven't found many other libraries other than these that properly handle thrown exceptions. jQuery's deferred, for example, don't - the "fail" handler would never get the...
How do I check if a list is empty?
...
The pythonic way to do it is from the PEP 8 style guide (where Yes means “recommended” and No means “not recommended”):
For sequences, (strings, lists, tuples), use the fact that empty sequences are false.
Yes: if not seq:
if seq:
No: if len(seq):
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Hidden Features of MySQL
...ems to require a fair bit of planning and re-organizing the SQL queries to guide MySQL to execute them faster.
Administration:
max_connections is the number of concurrent connections. The default value is 100 connections (151 since 5.0) - very small.
Note:
connections take memory and your OS mi...
What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
... more official, you can also read Tom White's book "Hadoop: The Definitive Guide". Here is the interesting part for your question.
Tom White has been an Apache Hadoop committer since February 2007, and is a member of the Apache Software Foundation, so I guess it is pretty credible and official...
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Are braces necessary in one-line statements in JavaScript?
...ays include braces... but I'm rethinking it now. You have the airbnb style guide on your side!
– senderle
Sep 10 '15 at 18:35
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Should I prefer pointers or references in member data?
...rator etc), but behaves like a pointer (can dangle) - so e.g. Google Style Guide discourages it
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How to map a composite key with JPA and Hibernate?
...st will fail, if that is a proxy.
http://www.laliluna.de/jpa-hibernate-guide/ch06s06.html
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Surrogate vs. natural/business keys [closed]
...append to the EOF on disk. If you use less sequential data such as text or GUID(UUID), there will be a lot more disk IO and effort to balance the index, I think that's kind of big difference
– Jin
May 2 '16 at 20:42
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