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Difference between SRC and HREF
The SRC and HREF attributes are used to include some external entities like an image, a CSS file, a HTML file, any other web page or a JavaScript file.
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How do I detect if software keyboard is visible on Android Device or not?
...Dianne Hackborn from the Android team has replied. However, you can detect it indirectly by checking if the window size changed in #onMeasure. See How to check visibility of software keyboard in Android?.
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VS 2012: Scroll Solution Explorer to current file
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Tools - > Options - > Projects and Solutions - > Track Active Item in Solution Explorer
It's off by default (as you've noticed), but once it's on, Solution Explorer will expand folders and highlight the current document as you switch between files.
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How to clean project cache in Intellij idea like Eclipse's clean?
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Depending on the version you are running. It is basically the same just go to
File -> Invalidate caches, then restart Intellij
or
File -> Invalidate caches / Restart
The main difference is that in older versions you had to manually restart as cache files are ...
Is there a REAL performance difference between INT and VARCHAR primary keys?
...a natural key instead of a surrogate key. Only you can assess if the benefit of this is significant in your application.
That is, you can measure the queries in your application that are the most important to be speedy, because they work with large volumes of data or they are executed very frequ...
Are there constants in JavaScript?
... IE 8, 9 and 10. Some may also need strict mode enabled.
You can use var with conventions like ALL_CAPS to show that certain values should not be modified if you need to support older browsers or are working with legacy code:
var MY_CONSTANT = "some-value";
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Hide options in a select list using jQuery
I have an object with key/value pairs of options I want to hide/remove from a select list.
Neither of the following option selectors work. What am I missing?
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Why would someone use WHERE 1=1 AND in a SQL clause?
Why would someone use WHERE 1=1 AND <conditions> in a SQL clause (Either SQL obtained through concatenated strings, either view definition)
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Is it possible to “await yield return DoSomethingAsync()”
Are regular iterator blocks (i.e. "yield return") incompatible with "async" and "await"?
9 Answers
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django admin - add custom form fields that are not part of the model
I have a model registered in the admin site. One of its fields is a long string expression. I'd like to add custom form fields to the add/update page of this model in the admin that based on these fields values I will build the long string expression and save it in the relevant model field.
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