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Find running median from a stream of integers
...n left side to represent elements that are less than the effective median, and a min heap on right side to represent elements that are greater than the effective median.
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Bash ignoring error for a particular command
...shell to think that the entire pipe has non-zero exit code
when one of commands in the pipe has non-zero exit code (with pipefail off it must the last one).
$ set -o pipefail
$ false | true ; echo $?
1
$ set +o pipefail
$ false | true ; echo $?
0
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In-memory size of a Python structure
Is there a reference for the memory size of Python data stucture on 32- and 64-bit platforms?
7 Answers
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mysql error 1364 Field doesn't have a default values
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Set a default value for Created_By (eg: empty VARCHAR) and the trigger will update the value anyways.
create table try (
name varchar(8),
CREATED_BY varchar(40) DEFAULT '' not null
);
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Mercurial move changes to a new branch
...evisions 1-2 on a named branch, let's say my-feature. Update to revision 0 and create that branch:
$ hg up 0
$ hg branch my-feature
$ hg ci -m "start new branch my-feature"
The history now looks like this:
@ changeset: 3:b5939750b911
| branch: my-feature
| tag: tip
| parent: ...
iPhone: How to get current milliseconds?
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I've been using this method for a while and came to realise it can return an earlier value when you call it after couple of miliseconds (e.g. call it consecutively and you might not end up with an increasing sequence)
– Ege Akpinar
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“open/close” SqlConnection or keep open?
...d Dec 14 '10 at 13:02
Adriaan StanderAdriaan Stander
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What's the difference between findAndModify and update in MongoDB?
I'm a little bit confused by the findAndModify method in MongoDB. What's the advantage of it over the update method? For me, it seems that it just returns the item first and then updates it. But why do I need to return the item first? I read the MongoDB: the definitive guide and it says that i...
Images can't contain alpha channels or transparencies
...jpg OR update your png (photoshop or whatever you using to create the png) and delete the transparency areas. if you work with shadows, use jpg, that will do no headaches.
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Visual Studio build fails: unable to copy exe-file from obj\debug to bin\debug
...ducing this bug can be found here at Microsoft Connect. I have also tested and verified that the solution given in the accepted answer below works on that sample project. If this solution doesn't work for you, you are probably having a different issue (which belongs in a separate question).
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