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Extension method and dynamic object
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To expand on Stecya's answer... extension methods aren't supported by dynamic typing in the form of extension methods, i.e. called as if they were instance methods. However, this will work:
dynamic dList = list;
Console.WriteLine(Enumerable.First(dList));
Of course, that may or may ...
Sleeping in a batch file
...o automate something on a Windows box, I've needed to pause its execution for several seconds (usually in a test/wait loop, waiting for a process to start). At the time, the best solution I could find uses ping (I kid you not) to achieve the desired effect. I've found a better write-up of it here ,...
ALTER TABLE without locking the table?
...ead-locked (allowing concurrent reads, but prohibiting concurrent writes) for the duration of the statement. If it's a big table, INSERT or UPDATE statements could be blocked for a looooong time. Is there a way to do a "hot alter", like adding a column in such a way that the table is still updatable...
ExecJS::RuntimeError on Windows trying to follow rubytutorial
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My friend was attempting a Rails tutorial on Win 8 RTM a few months ago and ran into this error. Not sure if this issue exists in Windows 7 as well, but this may help.
Options:
1) Removing //= require_tree . / Ignoring the issue - As ColinR stated above, this...
Covariance, Invariance and Contravariance explained in plain English?
...ersion and others say it is used to decide whether a method is overwritten or overloaded.
All of the above.
At heart, these terms describe how the subtype relation is affected by type transformations. That is, if A and B are types, f is a type transformation, and ≤ the subtype relation (i.e. A ...
Flatten an Array of Arrays in Swift
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Just to state this more generally, flatMap is available as of Swift 1.2.
– Mick MacCallum
Apr 24 '15 at 4:56
3
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Windows batch file file download from a URL
....example.com/package.zip ) using a Windows batch file. I am getting an error code when I write the function below:
19 Answ...
How can Xcode 6 adaptive UIs be backwards-compatible with iOS 7 and iOS 6?
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Changes made to the UI with Size Classes in Interface Builder DO appear correctly on iOS 7 devices and the Preview in Xcode. For example, I changed some Auto Layout constraints and font sizes for Regular height Regular width and those changed constraints are visible in the iPad Simulator running i...
Evaluate expression given as a string
I'm curious to know if R can use its eval() function to perform calculations provided by e.g. a string.
7 Answers
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When to use DataContract and DataMember attributes?
...about the DataContract attribute in WCF. As per my knowledge it is used for serializating user defined type like classes. I wrote one class which is exposed at client side like this.
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