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“There was an error while performing this operation”
...ssue and resolved in exactly same way as you suggested and all works again now. in our case we upgraded server from windows 2012 to windows 2016.
– Davide Piras
Jan 12 '18 at 10:52
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Is a Java hashmap search really O(1)?
...hm! We can generalzie this to
pcollision x k = (n / capacity)k
And now we can disregard some arbitrary number of collisions and end up with vanishingly tiny likelihood of more collisions than we are accounting for. You could get the probability to an arbitrarily tiny level by choosing the c...
How to check task status in Celery?
...o True, then the state will be STARTED.
The state PENDING means "I don't know."
An AsyncResult with the state PENDING does not mean anything more than that Celery does not know the status of the task. This could be because of any number of reasons.
For one thing, AsyncResult can be constructed wi...
How can I conditionally require form inputs with AngularJS?
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This feature is documented by now: docs.angularjs.org/api/ng/directive/ngRequired
– bjunix
May 9 '16 at 11:42
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Using the scrollwheel in GNU screen
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Yes, I know about scrollback mode. I was hoping that I would not have to manually enter scrollback mode in order to use the mouse. Thanks.
– JesperE
Jan 24 '09 at 20:34
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SQL Server ':setvar' Error
...TABASE [$DatabaseName] it was simply CREATE DATABASE MYDBNAME. This script now works to create my database via executenonquery() during my first application startup after install.
– Scott
Jul 19 '16 at 20:56
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Reset the database (purge all), then seed a database
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As of Rails 5, the rake commandline tool has been aliased as rails so now
rails db:reset instead of rake db:reset
will work just as well
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HTML select form with option to enter custom value
...e of the id of the datalist.
Update: As of March 2019 all major browsers (now including Safari 12.1 and iOS Safari 12.3) support datalist to the level needed for this functionality. See caniuse for detailed browser support.
It looks like this:
<input type="text" list="cars" />
<data...
Access Asset Catalog programmatically
I know it's a new feature and this may not be possible, but I would love to be able to use an Asset Catalog to organize my assets, but I access all of my images programmatically. How would I access my images, now? Do I still access them by their file names like so:
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How do I comment on the Windows command line?
...essor (such as within complex if or for statements) so I generally use rem nowadays. In any case, it's a hack, suborning the label infrastructure to make it look like a comment when it really isn't. For example, try replacing rem with :: in the following example and see how it works out:
if 1==1 (
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