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how to exclude null values in array_agg like in string_agg using postgres?
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SQL Fiddle
select
id,
(select array_agg(a) from unnest(canonical_users) a where a is not null) canonical_users,
(select array_agg(a) from unnest(non_canonical_users) a where a is not null) non_canonical_users
from (
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Convert Bitmap to File
I understand that using BitmapFactory can convert a File to a Bitmap, but is there any way to convert a Bitmap image to a File?
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File to byte[] in Java
How do I convert a java.io.File to a byte[] ?
25 Answers
25
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Start an Activity with a parameter
I'm very new on Android development.
5 Answers
5
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How to check if two arrays are equal with JavaScript? [duplicate]
...s, we run into the tree isomorphism problem http://logic.pdmi.ras.ru/~smal/files/smal_jass08_slides.pdf - fortunately it's not as hard as general graph isomorphism; there is in fact an O(#vertices) algorithm to solve it, but it can get very complicated to do it efficiently. The pathological case is ...
How to Store Historical Data
...e exact same fields as FOO with the exception of an auto-incrementing HIST_ID. Every time FOO is updated, I perform an insert statement into FOO_Hist similar to: insert into FOO_HIST select * from FOO where id = @id .
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Scrollview vertical and horizontal in android
...d solution:
Custom ScrollView:
package com.scrollable.view;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;
public class VScroll extends ScrollView {
public VScroll(Context context, AttributeSet attrs, int ...
How to create a new database after initally installing oracle database 11g Express Edition?
...QL Developer environment.
To exit SQL Developer, select Exit from the File menu.
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Best way to list files in Java, sorted by Date Modified?
I want to get a list of files in a directory, but I want to sort it such that the oldest files are first. My solution was to call File.listFiles and just resort the list based on File.lastModified, but I was wondering if there was a better way.
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Need command line to start web browser using adb
...me/com.google.android.apps.chrome.Main \
-a android.intent.action.VIEW -d 'file:///sdcard/lazer.html'
Also give Chrome access to sdcard via
adb shell pm grant com.android.chrome android.permission.READ_EXTERNAL_STORAGE
Swap com.android.chrome with com.chrome.canary if you are using Chrome canar...