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How to save a Python interactive session?
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reinteract is now superseded by the IPython Notebook and QtConsole.
– Eric O Lebigot
Jan 26 '14 at 17:17
What is the reason for a red exclamation mark next to my project in Eclipse?
...r problems in
a project. The Package Explorer and Project Explorer views now show a
new decorator on Java projects and working sets that contain build
path errors:
The concrete errors can be seen in the Problems view, and if you open
the view menu and select Group By > Java Pro...
How do I purge a linux mail box with huge number of emails? [closed]
I have setup some cron jobs and they send the crons result to an email. Now over the months I have accumulated a huge number of emails.
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'is' versus try cast with null check
... casts seem to be performed as fast as they used to be but as and linq are now approximately 3 times faster.
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Set selected option of select box
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You saved my day, now i can have a nice weekend. Thank you man
– Ton Gok
Aug 28 at 14:13
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Wait 5 seconds before executing next line
... work that way. You can schedule a function of code to run 5 seconds from now, but you have to put the code that you want to run later into a function and the rest of your code after that function will continue to run immediately.
For example:
function stateChange(newState) {
setTimeout(funct...
How can I tell how many objects I've stored in an S3 bucket?
...nto your account on S3, and go Account - Usage. It seems the billing dept knows exactly how many objects you have stored!
Simply downloading the list of all your objects will actually take some time and cost some money if you have 50 million objects stored.
Also see this thread about StorageObjec...
Is there a way to access the “previous row” value in a SELECT statement?
...from table t1, table t2
where t1.primaryKey = t2.primaryKey - 1
If you know how to order things but not how to get the previous value given the current one (EG, you want to order alphabetically) then I don't know of a way to do that in standard SQL, but most SQL implementations will have extensio...
In Java, what does NaN mean?
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Minimal runnable example
The first thing that you have to know, is that the concept of NaN is implemented directly on the CPU hardware.
All major modern CPUs seem to follow IEEE 754 which specifies floating point formats, and NaNs, which are just special float values, are part of th...
Best way to generate random file names in Python
...o this.
import datetime
basename = "mylogfile"
suffix = datetime.datetime.now().strftime("%y%m%d_%H%M%S")
filename = "_".join([basename, suffix]) # e.g. 'mylogfile_120508_171442'
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