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Spring @Transactional - isolation, propagation
...nce characteristics in a multi-threaded application. I think if you understand the dirty reads concept you will be able to select a good option.
Example of when a dirty read can occur:
thread 1 thread 2
| |
write(x) |
| |
| read(x)
...
PHP: How to use array_filter() to filter array keys?
...in strings.
You can also use ARRAY_FILTER_USE_BOTH to have both the value and the key passed to your filter function. Here's a contrived example based upon the first, but note that I'd not recommend encoding filtering rules using $allowed this way:
$my_array = ['foo' => 1, 'bar' => 'baz', 'h...
How to automatically install Ansible Galaxy roles?
...
See also @Kieran Andrews answer below. It expands this one.
– Marco Ferrari
Feb 1 '16 at 10:18
1
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Understanding the Rails Authenticity Token
... a form to create, update, or destroy a resource, the Rails app creates a random authenticity_token, stores this token in the session, and places it in a hidden field in the form. When the user submits the form, Rails looks for the authenticity_token, compares it to the one stored in the session, an...
Mark error in form using Bootstrap
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(UPDATED with examples for Bootstrap v4, v3 and v3)
Examples of forms with validation classes for the past few major versions of Bootstrap.
Bootstrap v4
See the live version on codepen
<div class="container">
<form>
<div class="form-group row...
One DbContext per web request… why?
...g how to set up Entity Framework's DbContext so that only one is created and used per HTTP web request using various DI frameworks.
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Print in one line dynamically
I would like to make several statements that give standard output without seeing newlines in between statements.
20 Answers...
I need to securely store a username and password in Python, what are my options?
...ll periodically pull information from a 3rd party service using a username and password combo. I don't need to create something that is 100% bulletproof (does 100% even exist?), but I would like to involve a good measure of security so at the very least it would take a long time for someone to break...
Setting up a common nuget packages folder for all solutions when some projects are included in multi
I have been using NuGet to retrieve packages from external and internal package sources, which is very convenient. But I have realized that the packages are by default stored per solution, which is very frustrating when some projects with NuGet references are included in several solutions. Then the ...
Why is list initialization (using curly braces) better than the alternatives?
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Basically copying and pasting from Bjarne Stroustrup's "The C++ Programming Language 4th Edition":
List initialization does not allow narrowing (§iso.8.5.4). That is:
An integer cannot be converted to another integer that cannot hold its v...