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How do I debug an MPI program?
...tacks and variables of 220,000 processes at 0.1s as part of the acceptance testing on Oak Ridge's Jaguar cluster.
@tgamblin mentioned the excellent STAT, which integrates with Allinea DDT, as do several other popular open source projects.
...
How to determine whether a given Linux is 32 bit or 64 bit?
..._TYPE=x86_64-linux-gnu
You can print just one of those variables or do a test against their values with command line options to dpkg-architecture.
I have no idea how dpkg-architecture deduces the architecture, but you could look at its documentation or source code (dpkg-architecture and much of...
What is trunk, branch and tag in Subversion? [duplicate]
...f the system, treat those directories. One could easily name them 'main', 'test', and 'releases.'; As long as everyone using the system understands how to use each section properly, it really doesn't matter what they're called.
...
How to convert an NSTimeInterval (seconds) into minutes
...de looks like it would be slow. It isn't. I'm doing a timer app and I just tested Albaregar's version against something in the style of Brian Ramsey (and others)... and surprisingly, even polling 100 times a second (which is tremendous overkill) on a relatively slow device (4S) there was less than a...
Multiline syntax for piping a heredoc; is this portable?
...
Hmm, I suppose yes, according to the test in bash in POSIX mode:
$ bash --posix
$ cat <<EOF |
> ahoj
> nazdar
> EOF
> sed 's/a/b/'
bhoj
nbzdar
share
|
...
IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
...adding the fragment with commitAllowingStateLoss doesn't play any part. My testing shows this to be true. It has no effect on this specific exception. What we need is a popBackStackImmediateAllowingStateLoss method.
– Synesso
Jan 9 '15 at 1:32
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Rails: call another controller action from a controller
...I should not do that, but this is not part of my application it's just for testing and evaluating my application.
– ddayan
Apr 24 '11 at 22:37
9
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MySQL: Set user variable from result of query
...FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES (111111, 5);
Result:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT ...
Why is semicolon allowed in this python snippet?
...t be clear to which if clause a
following else clause would belong:
if test1: if test2: print x
Also note that the semicolon binds tighter than the colon in this
context, so that in the following example, either all or none of the
print statements are executed:
if x < y < z: prin...
The object 'DF__*' is dependent on column '*' - Changing int to double
...special script(DropConstraint) to remove it without knowing it's name (was tested at EF 6.1.3):
public override void Up()
{
DropConstraint();
AlterColumn("dbo.MyTable", "Rating", c => c.Double(nullable: false));
}
private void DropConstraint()
{
Sql(@"DECLARE @var0 nvarchar(128)...