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C# Lambda expressions: Why should I use them?
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Expression trees are a very powerful new feature of C# 3.0 that allow an API to look at the structure of an expression instead of just getting a reference to a method that can be executed. An API just has to make a delegate parameter into an Expression<T> parameter and the compiler will gen...
Trouble comparing time with RSpec
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@DavidMoles .second is a rails extension: api.rubyonrails.org/classes/Numeric.html
– jwadsack
May 5 '15 at 21:27
add a comment
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Open directory dialog
...ead:
Third-party libraries, such as Ookii dialogs (.NET 3.5)
The Windows API Code Pack-Shell:
using Microsoft.WindowsAPICodePack.Dialogs;
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var dialog = new CommonOpenFileDialog();
dialog.IsFolderPicker = true;
CommonFileDialogResult result = dialog.ShowDialog();
Note that this dialog is no...
Manually map column names with class properties
...chNamesWithUnderscores option. At best, if we refactored the configuration API, I would leave the MatchNamesWithUnderscores member in place (that still works, ideally) and add an [Obsolete] marker to point people to the new API.
– Marc Gravell♦
Aug 11 '16 at ...
'App not Installed' Error on Android
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For me, On Android 9 (API 28), disabling Google Play Protect from play store app worked the trick, and i was able to get rid of the App not Installed error.
To disable Google Play Protect. Open "Play Store" application => tap
on Menu butt...
WebDriver: check if an element exists? [duplicate]
...ust in case anyone needs a pointer to it: selenium.googlecode.com/git/docs/api/java/org/openqa/selenium/…
– Chen Xie
Mar 20 '15 at 22:35
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How to listen for changes to a MongoDB collection?
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Since MongoDB 3.6 there will be a new notifications API called Change Streams which you can use for this. See this blog post for an example. Example from it:
cursor = client.my_db.my_collection.changes([
{'$match': {
'operationType': {'$in': ['insert', 'replace']}...
vertical & horizontal lines in matplotlib
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matplotlib.org/api/pyplot_api.html#matplotlib.pyplot.axhline <- documentation. You should edit your answer to include this link
– tacaswell
Jun 5 '13 at 4:06
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How can I convert an RGB image into grayscale in Python?
... do it all in matplotlib.
Background:
http://matplotlib.sourceforge.net/api/colors_api.html
http://en.wikipedia.org/wiki/HSL_and_HSV
Alternatively, you could use PIL or the builtin colorsys.rgb_to_yiq() to convert to a colorspace with a true luma value. You could also go all in and roll your o...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
...ying representation, however, the primary difference is the breadth of the API for working with vectors: they have almost all the operations you'd normally associate with lists (with a fusion-driven optimization framework), while UArray have almost no API.
For color images I will wish to store trip...