大约有 2,000 项符合查询结果（耗时：0.0228秒） [XML]
动态追踪（Dynamic Tracing）技术漫谈 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...面的原因，并不会提供任何调试符号，以增加逆向工程和破解的难度。其中有一个例子是 Intel 公司的 IPP 这个程序库。IPP 针对 Intel 的芯片提供了很多常见算法的优化实现。我们也曾经尝试过在生产系统上面去使用基于 IPP 的 gzip...
Want to find records with no associated records in Rails
...d it, but he deserves the +1s for this. Great addition!
Update 4 - Rails 6.1
Thanks to Tim Park for pointing out that in the upcoming 6.1 you can do this:
Person.where.missing(:contacts)
Thanks to the post he linked to too.
...
Entity Framework code first unique column
...
In Entity Framework 6.1+ you can use this attribute on your model:
[Index(IsUnique=true)]
You can find it in this namespace:
using System.ComponentModel.DataAnnotations.Schema;
If your model field is a string, make sure it is not set to nv...
Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...全攻略一个简单的linuxcrackme的逆向前言最不喜欢的就是写破解教程，酒后一时冲动，老夫卿发少年狂，许下将写一篇linux平台逆向的文章的诺言，作...一个简单的linux crackme的逆向
前言
最不喜欢的就是写破解教程，酒后一...
Logical operator in a handlebars.js {{#if}} conditional
...ho developed Handlebars.
Handlebars.registerHelper('ifCond', function(v1, v2, options) {
if(v1 === v2) {
return options.fn(this);
}
return options.inverse(this);
});
You can then call the helper in the template like this
{{#ifCond v1 v2}}
{{v1}} is equal to {{v2}}
{{else}}
{{v1...
git-svn: how do I create a new svn branch via git?
...
as of git v1.6.1, git svn branch is available.
From the git docs:
branch
Create a branch in the SVN repository.
-m, --message
Allows to specify the commit message.
-t, --tag
Create ...
How to remove empty cells in UITableView? [duplicate]
...
Implemented with swift on Xcode 6.1
self.tableView.tableFooterView = UIView(frame: CGRectZero)
self.tableView.tableFooterView?.hidden = true
The second line of code does not cause any effect on presentation, you can use to check if is hidden or not.
Ans...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...个Master都提供read-write服务。这个模型是Master-Slave的加强版，数据间同步一般是通过Master间的异步完成，所以是最终一致性。 Master-Master的好处是，一台Master挂了，别的Master可以正常做读写服务，他和Master-Slave一样，当数据没有被...
Split delimited strings in a column and insert as new rows [duplicate]
...|b,d\n4|e,f"), header = F, sep = "|", stringsAsFactors = F)
df
## V1 V2
## 1 1 a,b,c
## 2 2 a,c
## 3 3 b,d
## 4 4 e,f
s <- strsplit(df$V2, split = ",")
data.frame(V1 = rep(df$V1, sapply(s, length)), V2 = unlist(s))
## V1 V2
## 1 1 a
## 2 1 b
## 3 1 c
## 4 2 a
## 5 2 c...
How to convert C# nullable int to int
...r are all correct; I just wanted to add one more that's slightly cleaner:
v2 = v1 ?? default(int);
Any Nullable<T> is implicitly convertible to its T, PROVIDED that the entire expression being evaluated can never result in a null assignment to a ValueType. So, the null-coalescing operator ?...