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Bill Gross超火爆演讲: 创业成功唯一最关键因素 - 资讯 - 清泛网 - 专注C/C++及内核技术
...正能影响它们成功的关键性因素，而且，我想尝试用一种系统化的方式研究，以避免我一些直觉性的东西，以及因为过去经历我曾操盘和看过那么多公司后，可能带来的一些误导。
而我想搞清楚这个问题，是因为我 12 岁就开始...
Convert array of strings to List
...ystem.Linq;
// ...
public void My()
{
var myArray = new[] { "abc", "123", "zyx" };
List<string> myList = myArray.ToList();
}
PS. There's also ToArray() method that works in other way.
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Dynamically select data frame columns using $ and a character value
...is a reproducible example below:
# set seed for reproducibility
set.seed(123)
df <- data.frame( col1 = sample(5,10,repl=T) , col2 = sample(5,10,repl=T) , col3 = sample(5,10,repl=T) )
# We want to sort by 'col3' then by 'col1'
sort_list <- c("col3","col1")
# Use 'do.call' to call order. S...
Converting String to Int with Swift
...
swift 4.0
let stringNumber = "123"
let number = Int(stringNumber) //here number is of type "Int?"
//using Forced Unwrapping
if number != nil {
//string is converted to Int
}
you could also use Optional Binding other than forced binding.
eg...
How to compare two floating point numbers in Bash?
...result back to the shell in a proper, machine-readable way. if awk -v n1="123.456" -v n2="3.14159e17" 'BEGIN { exit (n1 <= n2) }' /dev/null; then echo bigger; else echo not; fi ... though note how the condition is inverted (the exit status 0 means success to the shell).
– t...
Android应用内存泄露分析、改善经验总结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... break;
}
}
}
}
IO操作后，没有关闭文件导致的内存泄露，比如Cursor、FileInputStream、FileOutputStream使用完后没有关闭，这种问题在Android Studio 2.0中能够通过静态代码分析检查出来，直接改善...
ASP.NET Identity reset password
...();//"<YourLogicAssignsRequestedUserId>";
String newPassword = "test@123"; //"<PasswordAsTypedByUser>";
String hashedNewPassword = UserManager.PasswordHasher.HashPassword(newPassword);
ApplicationUser cUser = await store.FindByIdAsync(userId);
await store.SetPasswordH...
Convert a number range to another range, maintaining ratio
...edited Dec 16 '14 at 5:02
Rizier123
55k1616 gold badges7777 silver badges119119 bronze badges
answered Dec 16 '14 at 4:40
...
Disabled form inputs do not appear in the request
...;form action="/Media/Add">
<input type="hidden" name="Id" value="123" />
<input type="textbox" name="Percentage" value="100" readonly/>
</form>
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OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...这种模式
其它诸如只需要回复一个包给MySQL客户端的DML操作，例如INSERT,UPDATE等也使用这种模式，只是工作线程由于只需要发一个包，所以不会阻塞在信号量上，直接就返回了
详细分析如下：
message的引用计数初始化为1
前面...