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how to exclude null values in array_agg like in string_agg using postgres?
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Thanks. But if the main query (s) returns a 1000 rows, then the 2 subqueries (using unnest) will run once for each row.. Will it be better to tolerate NULLs than executing 2000 extra select queries ?
– Daud
Oct 29 '12 at 17:07
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How to recursively list all the files in a directory in C#?
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edited May 14 at 20:00
barlop
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answered M...
In Python, how can you load YAML mappings as OrderedDicts?
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edited Oct 4 '18 at 16:09
answered Feb 20 '14 at 15:47
c...
WPF Blurry fonts issue- Solutions
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Technical background
There is a in-depth article about WPF Text rendering from one of the WPF ...
How can I get dictionary key as variable directly in Python (not by searching from value)?
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answered Aug 23 '10 at 7:04
systempuntooutsystempuntoout
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Removing duplicate rows in vi?
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answered Dec 8 '08 at 22:32
Brian CarperBrian Carper
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How to add a button to PreferenceScreen
...s/layout/main.xml. It could look something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:o...
Concurrent vs serial queues in GCD
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edited Dec 1 '15 at 13:50
answered Oct 4 '13 at 11:12
Ste...
Hashing a string with Sha256
...spx
If you inspect your bytes array, you'll see that every second byte is 0x00 (because of the double-wide encoding).
You should be using Encoding.UTF8.GetBytes instead.
But also, you will see different results depending on whether or not you consider the terminating '\0' byte to be part of the d...