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How to delete all datastore in Google App Engine?
...hboard for your app (login on appengine) then datastore --> dataviewer, select all the rows for the table you want to delete and hit the delete button (you'll have to do this for all your tables).
You can do the same programmatically through the remote_api (but I never used it).
If you're talki...
MySQL, update multiple tables with one query
...'blah';
To see what this is going to update, you can convert this into a select statement, e.g.:
SELECT t2.t1_id, t2.t3_id, t1.a, t2.b, t2.c AS t2_c, t3.c AS t3_c
FROM t1
INNER JOIN t2 ON t2.t1_id = t1.id
INNER JOIN t3 ON t2.t3_id = t3.id
WHERE t1.a = 'blah';
An example using the same tables as...
Cocoa Core Data efficient way to count entities
...an efficient way to make a count over an Entity-Type (like SQL can do with SELECT count(1) ...). Now I just solved this task with selecting all with NSFetchedResultsController and getting the count of the NSArray ! I am sure this is not the best way...
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How to use arguments from previous command?
... see:
$ echo ace
By the way, you could have put the echo on the line by selecting argument 0:
Press Alt-0 Alt-Ctrl-y
Edit:
To answer the question you added to your original:
You can press Alt-0 then repeatedly press Alt-. to step through the previous commands (arg 0). Similarly Alt-- then rep...
How do I dump the data of some SQLite3 tables?
...SOME_STRING' for something other than a comma.
.headers on
.out file.csv
select * from MyTable;
If you want to reinsert into a different SQLite database then:
.mode insert <target_table_name>
.out file.sql
select * from MyTable;
...
Best TCP port number range for internal applications [closed]
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Short answer: use an unassigned user port
Over achiever's answer - Select and deploy a resource discovery solution. Have the server select a private port dynamically. Have the clients use resource discovery.
The risk that that a server will fail because the port it wants to listen on is n...
What is the Java equivalent for LINQ? [closed]
...
You can select the items in a collection (and much more) in a more readable way by using the lambdaj library
https://code.google.com/archive/p/lambdaj/
It has some advantages over the Quaere library because it doesn't use any magic...
How to change checkbox's border style in CSS?
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outline is very good, and it works for all input and select boxes, making this useful for ".error" classes.
– SztupY
Oct 3 '11 at 14:42
2
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How to write multiple line string using Bash with variables?
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The syntax (<<<) and the command used (echo) is wrong.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.c...
Convert file: Uri to File in Android
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We selected a file from a chooser and then we'll first have to copy the file? :/
– M. Usman Khan
Jul 22 at 7:18
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