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ObservableCollection Doesn't support AddRange method, so I get notified for each item added, besides

...with DataGrid, ListView and many more, that you can show an "Are you sure" confirmation to the user), the updated VB version is in the bottom of this message. Please accept my apology that the screen is too narrow to contain my code, I don't like it either. VB.NET: Imports System.Collections.Spec...
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Show or hide element in React

... Do you have any source/benchmark/example confirming this "If you set display: none - element is still rendered by react and added to DOM - that can have bad impact on performance." ? – neiya Feb 4 at 13:34 ...
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Spring @Transactional - isolation, propagation

...ions: Suppose you're in charge of implementing a signup service in which a confirmation e-mail is sent to the user. You come up with two service objects, one for enrolling the user and one for sending e-mails, which the latter is called inside the first one. For example something like this: /* Sign...
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The definitive guide to form-based website authentication [closed]

...order (or change your shipping address, credit card etc.), they ask you to confirm your password. Financial websites such as banks and credit cards, on the other hand, only have sensitive data and should not allow auto-login or a low-security mode. List of external resources Dos and Don'ts of Cl...
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Can not connect to local PostgreSQL

...the database does not have file permissions to access the socket file. To confirm this I've done some tests on Ubuntu and psql to try to generate the same error (included below). You need to check the permissions on the socket file and its directories /var and /var/pgsql_socket. Your Rails app (O...
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PyPy — How can it possibly beat CPython?

...e grained locks). As Marcelo mentioned, the JIT. Being able to on the fly confirm the type of an object can save you the need to do multiple pointer dereferences to finally arrive at the method you want to call. Q2. Which Python implementation was used to implement PyPy? The PyPy interpreter is ...
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Do I use , , or for SVG files?

...ou assured the onerror fires if svg doesn't render? what browsers have you tested? – artlung Nov 9 '15 at 18:41 1 ...
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How to clear gradle cache?

...ere, and the Gradle cache has to be enabled manually. EDIT 3: user tir38 confirmed that the Android builder cache is obsolete and has been eliminated with this find. tir38 also created
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python setup.py uninstall

...the package: $ pip uninstall package.name.you.have.found If it asks for confirmation about removing the package, then you are lucky guy and it will be removed. pip shall detect all packages, which were installed by pip. It shall also detect most of the packages installed via easy_install or setu...
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Why is NaN not equal to NaN? [duplicate]

...us/IEEE754.PDF, page 7 (search for the word "undefined"). As that document confirms, NaN is a well-defined concept. Furthermore, IEEE approach was to follow the regular mathematics rules as much as possible, and when they couldn't, follow the rule of "least surprise" - see https://stackoverflow.com...