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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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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...
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...
图表组件 · App Inventor 2 中文网
...top:40%; left:5px; width:200px; height:500px; display: none;}@media screen and (max-width: 700px) { #free_v { top:200%; }}
TCP 的那些事儿（下） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...么事都去依赖内核算法。
TCP的拥塞处理 – Congestion Handling
上面我们知道了，TCP通过Sliding Window来做流控（Flow Control），但是TCP觉得这还不够，因为Sliding Window需要依赖于连接的发送端和接收端，其并不知道网络中间发生了什...
JS: iterating over result of getElementsByClassName using Array.forEach
...ted (Babel), this is NOT compatible in IE < Edge, Opera, Safari < 9, Android browser, Chrome for Android, ...etc) Source: mozilla dev docs
– Sean
Sep 5 '16 at 5:53
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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?
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See also @Kieran Andrews answer below. It expands this one.
– Marco Ferrari
Feb 1 '16 at 10:18
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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 ...
How to delete migration files in Rails 3
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Would deleting the migration and then running a db:migrate wipe out the table that was created?
– alvincrespo
Oct 7 '10 at 17:35
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