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What is the most efficient/elegant way to parse a flat table into a tree?
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Now that MySQL 8.0 supports recursive queries, we can say that all popular SQL databases support recursive queries in standard syntax.
WITH RECURSIVE MyTree AS (
SELECT * FROM MyTable WHERE ParentId IS NULL
UNION ALL
SELECT m.* FROM MyTABLE AS m JOIN MyTree AS t ON m.ParentI...
Python in Xcode 4+?
...pe in "-l". This will tell bash to use your login environment (PYTHONPATH, etc..)
Do step #19 again.
Type in "-c '$(SOURCE_ROOT)/.py'"
Click "OK".
Start coding.
The nice thing about this way is it will use the same environment to develop in that you would use to run in outside of XCode (as setup...
Is there a macro recorder for Eclipse? [closed]
...it's not tied to any one program, it can be used in other editors, emails, etc.
For example, if I type ";;ln" AutoHotkey instantly sends the keystrokes to delete this and replace it with "System.out.println();" with the cursor in between the parentheses.
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Java EE web development, where do I start and what skills do I need? [closed]
...ou'd like to pick another, e.g. WildFly, TomEE, Payara, Liberty, WebLogic, etc. Otherwise you have to use Spring instead of Java EE. It's namely not possible to install EJB in a barebones servlet container without modifying the core engine, you'd in case of Tomcat basically be reinventing TomEE. See...
Solving “Who owns the Zebra” programmatically?
...ution in Python based on constraint-programming:
from constraint import AllDifferentConstraint, InSetConstraint, Problem
# variables
colors = "blue red green white yellow".split()
nationalities = "Norwegian German Dane Swede English".split()
pets = "birds dog cats horse zebra".sp...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...me itself (like when it switches from a linkedlist array to a fixed array, etc), and how to optimize them. See GDC 2012: From Console to Chrome for more.
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How to get the current date/time in Java [duplicate]
...te / time in a form that allows you to access the components (year, month, etc) numerically, you could use one of the following:
new Date() gives you a Date object initialized with the current date / time. The problem is that the Date API methods are mostly flawed ... and deprecated.
Calendar.get...
How to handle many-to-many relationships in a RESTful API?
...who referred them to that team, who their coach is/was while on that team, etc etc.
REST depends on caching for efficiency, which requires some consideration for cache atomicity and invalidation. If you POST a new entity to /teams/3/players/ that list will be invalidated, but you don't want the alte...
How do I get the current date in JavaScript?
...so, you can pass locale as argument, for example toLocaleDateString("sr"), etc.
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Difference between BeautifulSoup and Scrapy crawler?
...an specify constraints on how many (number of) URLs you want to crawl and fetch,etc. It is a complete framework for web-scraping or crawling.
While
BeautifulSoup is a parsing library which also does a pretty good job of fetching contents from URL and allows you to parse certain parts of them witho...