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Counting null and non-null values in a single query
... agree, COUNT(a) is a useful comment to add, but this does throw a warning/error depending on your stack and might warrant a comment in code. I would prefer the SUM method.
– Richard
Mar 29 '16 at 9:41
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How to add onload event to a div element
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You can trigger some js automatically on an IMG element using onerror, and no src.
<img src onerror='alert()'>
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What is the proper way to check for existence of variable in an EJS template (using ExpressJS)?
... wonder if I've got a bigger problem on my hands. This throws a Reference Error too: <% alert('test'); %>
– Aashay Desai
Mar 21 '11 at 0:34
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How do I convert a numpy array to (and display) an image?
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@user502144: Thanks for pointing out my error. I should have created an array of shape (h,w,3). (It's now fixed, above.) The length of the first axis can be thought of as the number of rows in the array, and the length of the second axis, the number of columns. So ...
typeof for RegExp
...e any String value except one of "Arguments", "Array", "Boolean", "Date", "Error", "Function", "JSON", "Math", "Number", "Object", "RegExp", and "String". The value of a [[Class]] internal property is used internally to distinguish different kinds of objects. Note that this specification does not pr...
How to simulate a click with JavaScript?
..., much like modern appliances, have made an old chore much easier and less error prone. It's not the solution for everyone, however, downvoting an answer that accurately answers the question using more concise, understandable syntax while being cross-browser compatible seems backwards. +1.
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How to reload .bash_profile from the command line?
...le && echo "File .bash_profile reloaded correctly" || echo "Syntax error, could not import the file"';
– Cristian Batista
Feb 8 '18 at 8:19
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Specifying a custom DateTime format when serializing with Json.Net
... This is the most flexible solution. If you get the following error : 'JsonConverterAttribute' does not contain a constructor that takes 2 arguments, it means your version of json.net is too old. You need to update to the latest json.net version.
– Florian Lavorel
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Cannot install Lxml on Mac os x 10.9
...e:
brew unlink libxml2
brew unlink libxslt
If you are having permission errors with Homebrew, especially on El Capitan, this is a helpful document. In essence, regardless of OS X version, try running:
sudo chown -R $(whoami):admin /usr/local
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UITableView didSelectRowAtIndexPath: not being called on first tap
...ap and following -> correct selection behavior, always
In my case, my error was checking Show Selection on Touch in Interface Builder. You can uncheck it in IB here:
Hope that helps someone
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