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What is the difference between self-types and trait subclasses?
A self-type for a trait A :
11 Answers
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How to run a PowerShell script without displaying a window?
How is it possible to run a PowerShell script without displaying a window or any other sign to the user?
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Service Temporarily Unavailable Magento?
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Check if there is a file called maintenance.flag and if so delete it.
Magento 1.x : maintenance.flag file is in : magento root directory
Magento 2.x : maintenance.flag file is in : var folder
When Magento is performing certain tasks it temporarily creates this file. Magento ch...
Unique fields that allow nulls in Django
...oo which has field bar. The bar field should be unique, but allow nulls in it, meaning I want to allow more than one record if bar field is null , but if it is not null the values must be unique.
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How to overlay one div over another div
I need assistance with overlaying one individual div over another individual div .
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CSS fixed width in a span
Within an unordered list:
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Is there a standard naming convention for git tags? [closed]
...een a lot of projects using v1.2.3 as the naming convention for tags in git. I've also seen some use 1.2.3 . Is there an officially endorsed style, or are there any good arguments for using either?
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Javascript regex returning true.. then false.. then true.. etc [duplicate]
I have a strange problem with the validation I am writing on a form. It is a 'Check Username' button next to an input. The input default value is the username for example 'betamax'. When I press 'Check Username' it passes the regex and sends the username to the server. The server behaves as expected...
Write a function that returns the longest palindrome in a given string
I thought of a solution but it runs in O(n^2) time
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Remove elements from collection while iterating
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Let me give a few examples with some alternatives to avoid a ConcurrentModificationException.
Suppose we have the following collection of books
List<Book> books = new ArrayList<Book>();
books.add(new Book(new ISBN("0-201-63361-2")));
books...