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How to parse a string to an int in C++?
... problem: what if the caller needs to distinguish between bad input (e.g. "123foo") and a number that is out of the range of int (e.g. "4000000000" for 32-bit int)? With stringstream, there is no way to make this distinction. We only know whether the conversion succeeded or failed. If it fails, we h...
How do I repeat an edit on multiple lines in Vim?
... to insert something on multiple lines, use Shift-i.
So for the text:
abc123abc
def456def
ghi789ghi
if you hit Ctrl-v with your cursor over the 1, hit j twice to go down two columns, then Shift-i,ESC , your text would look like this:
abc,123abc
def,456def
ghi,789ghi
(the multi-line insert has...
Windows启动过程 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...取磁盘的第零簇的内容。第零簇内容有一个特殊的称谓 - 操作系统主引导扇区 MBR(Master Boot Record)。
2、MBR保护两部分:
1.系统启动代码 (共有446 bytes)
2.分区表入口(16 bytes colored entries in the bottom)
3、根据系统代码，我们...
How to create a new database using SQLAlchemy?
...
123
SQLAlchemy-Utils provides custom data types and various utility functions for SQLAlchemy. You ...
Jackson JSON custom serialization for certain fields
...ill result in the desired output
{"name":"Joe","age":25,"favoriteNumber":"123"}
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How to determine whether an object has a given property in JavaScript
...throw new Error("IllegalArgumentException");
}
alert("ok");
}
f({req1: 123}); // error
f({req1: 123, req2: 456}); // ok
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LISTAGG in Oracle to return distinct values
...t useful:
with test_data as
(
select 'A' as col1, 'T_a1' as col2, '123' as col3 from dual
union select 'A', 'T_a1', '456' from dual
union select 'A', 'T_a1', '789' from dual
union select 'A', 'T_a2', '123' from dual
union select 'A', 'T_a2', '456' from dual
union select 'A', 'T_a2', '111' fr...
手握利器，直面“蓝脸”! ——使用WinDbg抗击系统崩溃 - 操作系统(内核) - ...
...屏崩溃：
1、运行在内核模式下的设备驱动程序或者操作系统函数引发了一个未被处理的异常，比如内存访问违例（由于企图写一个只读页面或者企图读一个当前未被映射的内存地址(即无效地址)而引起）。
2、调用一个内...
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
...变得越来越复杂，我们知道它会分成很多很多层次，包括操作系统内核然后上面是各种系统软件，像数据库和 Web 服务器，再往上有脚本语言或者其他高级语言的虚拟机、解释器及即时（JIT）编译器，顶上则是应用层面的各种业...
软件测试中的性能测试、负载测试、压力测试 - 更多技术 - 清泛网 - 专注C/C...
...用合适数量和类别的资源的能力，例如：用户在进行相关操作时，系统的内存和CPU的变化情况。
根据产品的时间特性和资源特性，效率测试可以包括不同的测试类型，例如：性能测试(Performance Test)、负载测试(Load Test)和压力测...