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CSS selector for first element with class
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This is one of the most well-known examples of authors misunderstanding how :first-child works. Introduced in CSS2, the :first-child pseudo-class represents the very first child of its parent. That's it. There's a very common misconception that it picks up whichever child ele...
How to retrieve a file from a server via SFTP?
...sider looking at the JSch library. JSch seems to be the preferred library for a few large open source projects, including Eclipse, Ant and Apache Commons HttpClient, amongst others.
It supports both user/pass and certificate-based logins nicely, as well as all a whole host of other yummy SSH2 feat...
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...
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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How to specify test directory for mocha?
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Edit : This option is deprecated : https://mochajs.org/#mochaopts
If you want to do it by still just running mocha on the command line, but wanted to run the tests in a folder ./server-tests instead of ./test, create a file at ./test/mocha.opts with just this in the file:
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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...
Best practice to validate null and empty collection in Java
...ty and MapUtils.isEmpty() methods which respectively check if a collection or a map is empty or null (i.e. they are "null-safe").
The code behind these methods is more or less what user @icza has written in his answer.
Regardless of what you do, remember that the less code you write, the less code...
What is the difference between static_cast and C style casting?
...tic_cast<> over C style casting? Are they equivalent? Is their any sort of speed difference?
7 Answers
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