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MySQL how to join tables on two fields
...
SELECT *
FROM t1
JOIN t2 USING (id, date)
perhaps you'll need to use INNEER JOIN or
where t2.id is not null
if you want results only matching both conditions
...
How do I truncate a .NET string?
...inqpad extension methods)
var val = string.Concat(Enumerable.Range(0, 50).Select(i => i % 10));
foreach(var limit in new[] { 10, 25, 44, 64 })
new Perf<string> {
{ "newstring" + limit, n => new string(val.Take(limit).ToArray()) },
{ "concat" + limit, n => string....
Remove element of a regular array
...res two array copies and a shift of everything after index rather than one selective array copy.
– Martin Brown
Jan 19 '09 at 19:25
2
...
All possible array initialization syntaxes
... objects, you can use var arr2 = Enumerable.Repeat(/* dummy: */ false, 10).Select(x => new object()).ToArray(); or similar.
– Jeppe Stig Nielsen
Jun 10 '14 at 13:28
add a c...
Fragments within Fragments
...e if you instantiate the Fragments within the xml layout after a tab was unselected and then reselected I would get the inflator error.
I solved this replacing all the fragments in xml with Linearlayouts and then useing a Fragment manager/ fragment transaction to instantiate the fragments everythi...
How to uninstall the “Microsoft Advertising SDK” Visual Studio extension?
...ed - but if you are absolutely sure about it, just right click on them and select "Forced Uninstall", and that's it. The most offending ones, especially the extensions with their "Uninstall" button disabled (grayed out) in VS, are perfectly safe to remove - they even warn if something else depends o...
Debugging sqlite database on the device
...ed a database with two tables and a dozen or so rows in each, and did full select queries on each table. One worked fine, the other reported a data error in the file. My best guess right now is an encoding mismatch between the Android and local shell.
– Mason
F...
Android: How to change CheckBox size?
... option i tried is scaleX and scaleY (Strach the check box) and custom xml selector with .png Images(its also creating problem with different screen size)
But we have another solution for that, that is Vector Drawable
Do it in 3 steps.
Step 1: Copy these three Vector Drawable to your drawable...
How to set SQL Server connection string?
...om the conection of Microsoft Visual Studio with the attached DB. When you select the DB, in the properties panel is shown the connection string.
The complete list of properties of the SqlConnectionStringBuilder class is listed in this page from the Microsoft MSDN site.
About the default user of S...
How to import load a .sql or .csv file into SQLite?
...Hey!');
Insert into T values (2, 'Hey, You!');
.mode csv
.output test.csv
select * from T;
Contents of test.csv:
1,Hey!
2,"Hey, You!"
delete from T;
.import test.csv T
Error: test.csv line 2: expected 2 columns of data but found 3
It seems we must transform the csv into a list of Insert statem...