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How do I query using fields inside the new PostgreSQL JSON datatype?
...g for some docs and/or examples for the new JSON functions in PostgreSQL 9.2.
3 Answers
...
JPA eager fetch does not join
...d mapped entity/collection of all root entities retrieved in first query = 2 queries
JOIN => one query to fetch both root entities and all of their mapped entity/collection = 1 query
So SELECT and JOIN are two extremes and SUBSELECT falls in between. One can choose suitable strategy based on he...
JavaScript % (modulo) gives a negative result for negative numbers
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273
Number.prototype.mod = function(n) {
return ((this%n)+n)%n;
};
Taken from this article: ...
What do “branch”, “tag” and “trunk” mean in Subversion repositories?
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edited Apr 4 '19 at 1:12
JoGusto
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answered Aug 19 '08 at 13:35
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What are the differences between double-dot “..” and triple-dot “…” in Git diff commit ranges?
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edited Sep 9 at 20:45
Gabriel Staples
7,28633 gold badges4848 silver badges7777 bronze badges
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Is there a way to detach matplotlib plots so that the computation can continue?
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221
Use matplotlib's calls that won't block:
Using draw():
from matplotlib.pyplot import plot, dra...
can we use xpath with BeautifulSoup?
...you can use the .xpath() method to search for elements.
try:
# Python 2
from urllib2 import urlopen
except ImportError:
from urllib.request import urlopen
from lxml import etree
url = "http://www.example.com/servlet/av/ResultTemplate=AVResult.html"
response = urlopen(url)
htmlparser =...
Why is a div with “display: table-cell;” not affected by margin?
...s="table">
<div class="row">
<div class="cell">123</div>
<div class="cell">456</div>
<div class="cell">879</div>
</div>
</div>
CSS
.table {display:table;border-collapse:separate;border-spacing:5px;}
.row {dis...
How many random elements before MD5 produces collisions?
...
Probability of just two hashes accidentally colliding is 1/2128 which is 1 in 340 undecillion 282 decillion 366 nonillion 920 octillion 938 septillion 463 sextillion 463 quintillion 374 quadrillion 607 trillion 431 billion 768 million 211 thousand 456.
However if you keep all the ha...
npm can't find package.json
I'm trying to install the dependencies of some example: npm's express 2.5.8 that I've downloaded, but all of the apps throw the same error:
...