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How to flatten tree via LINQ?
...licit stack:
public static IEnumerable<MyNode> Traverse(this MyNode root)
{
var stack = new Stack<MyNode>();
stack.Push(root);
while(stack.Count > 0)
{
var current = stack.Pop();
yield return current;
foreach(var child in current.Elements)
...
Android SharedPreference security
...estrict access to them, the same as on any Linux/Unix system.
Anyone with root level access to the device will be able to see them, as root has access to everything on the filesystem. Also, any application that runs with the same UID as the creating app would be able to access them (this is not usu...
Why is SELECT * considered harmful?
...tage of using * is that in some situations it can take better advantage of MySQL's cache systems. If you're running large numbers of similar select queries that request different column names (select A where X,select B where X,...) using a select * where X will allow the cache to handle a larger num...
Redis 的性能幻想与残酷现实 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...真实性能指标，区分清幻想和现实。我们才能真正考虑好如何合理的利用 Redis 的多功能特性，并有效规避的它的弱项，再给出一些 Redis 的使用建议：
-根据数据性质把 Redis 集群分类；我的经验是分三类：cache、buffer 和 db
- cache...
Error executing command 'ant' on Mac OS X 10.9 Mavericks when building for Android with PhoneGap/Cor
...
Simple as that, the issue is fixed.
Note Don't forget to sudo chown -R root:wheel /usr/share/ant
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Docker: adding a file from a parent directory
..., if you want to add/copy local content, it must be located under the same root path than the Dockerfile.
From the documentation:
The <src> path must be inside the context of the build; you
cannot ADD ../something/something, because the first step of a docker
build is to send the con...
Is there a unique Android device ID?
...on factory reset". Use at your own risk, and it can be easily changed on a rooted phone.
– Seva Alekseyev
Jun 23 '10 at 14:21
32
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Render Partial View Using jQuery in ASP.NET MVC
...is going to break if your web site is in a subdirectory rather than at the root. Using the helper fixes that problem and allows you to add parameters with dynamically set values.
– tvanfosson
Nov 3 '10 at 19:33
...
How to import existing Git repository into another?
...t pull -s subtree XXX_remote master
Git figures out on its own where the roots are before doing the merge, so you don't need to specify the prefix on subsequent merges.
The downside is that in the merged history the files are unprefixed (not in a subdirectory). As a result git log ZZZ/a will show...
What is a stack trace, and how can I use it to debug my application errors?
... multiple "Caused by" sections. For these, you typically want to find the "root cause", which will be one of the lowest "Caused by" sections in the stack trace. In our case, it's:
Caused by: java.lang.NullPointerException <-- root cause
at com.example.myproject.Book.getId(Book.java:22) &...