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Hibernate lazy-load application design
I tend to use Hibernate in combination with Spring framework and it's declarative transaction demarcation capabilities (e.g., @Transactional ).
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How efficient is locking an unlocked mutex? What is the cost of a mutex?
In a low level language (C, C++ or whatever): I have the choice in between either having a bunch of mutexes (like what pthread gives me or whatever the native system library provides) or a single one for an object.
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Why Choose Struct Over Class?
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According to the very popular WWDC 2015 talk Protocol Oriented Programming in Swift (video, transcript), Swift provides a number of features that make structs better than classes in many circumstances.
Structs are preferable if...
When to prefer JSON over XML?
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Favor XML over JSON when any of these is true:
You need message validation
You're using XSLT
Your messages include a lot of marked-up text
You need to interoperate with environments that don't support JSON
Favor JSON over XM...
Get list of data-* attributes using javascript / jQuery
Given an arbitrary HTML element with zero or more data-* attributes, how can one retrieve a list of key-value pairs for the data.
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Git commit date
Other than parsing git log for the date string, is there a Git native way to report the date of a certain commit?
4 Answers...
“Could not run curl-config: [Errno 2] No such file or directory” when installing pycurl
... edited Nov 11 '18 at 18:55
Boris
4,70255 gold badges4242 silver badges5252 bronze badges
answered Jun 5 '14 at 3:14
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Convert a positive number to negative in C#
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or even shorter myInt *= - 1?
– nawfal
Nov 3 '13 at 16:55
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PyPy — How can it possibly beat CPython?
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Q1. How is this possible?
Manual memory management (which is what CPython does with its counting) can be slower than automatic management in some cases.
Limitations in the implementation of the CPython interpreter preclude certain optimisations that PyPy can ...
How can I use redis with Django?
I've heard of redis-cache but how exactly does it work? Is it used as a layer between django and my rdbms, by caching the rdbms queries somehow?
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