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Is there a standard sign function (signum, sgn) in C/C++?
...rom one argument and the absolute value from the other:
result = copysign(1.0, value) // double
result = copysignf(1.0, value) // float
result = copysignl(1.0, value) // long double
will give you a result of +/- 1.0, depending on the sign of value. Note that floating point zeroes are signed: (+0...
How to reverse a 'rails generate'
...ntroller I had to remove related routes in routes.rb. P.S. I'm using rails 3.1
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WinDbg基础资料（日本語） - IT优秀资料 - 清泛网 - 专注C/C++及内核技术
...gerで取得したCrash Dumpは64bit.
２．上記の環境で、64bit版のWinDbgはインストールできない(出来るとしても、手続きが必要？)
３．取得したCrash Dumpは、32bitの開発機で分析できない。64bitのマシンを用意する必要がある。...
CFBundleVersion in the Info.plist Upload Error
...mber, instead the bits between dots are treated as SEPARATE numbers. e.g. "1.02" is treated by Apple as "1.2". So, for Apple, 1.02 is GREATER THAN 1.1
Apple sometimes gets "confused" and seems to compare your uploaded-app to the version of a DIFFERENT app you've previously uploaded. It's happened to...
Regex for string not ending with given suffix
...p -vE "part[0-9]*$"
This results on my system:
pci-0000:00:0b.0-usb-0:1:1.0-scsi-0:0:0:0
If I only want the partitions I could do:
ls -1 /dev/disk/by-path/* | grep -P "\-usb\-" | grep -E "part[0-9]*$"
Where I get:
pci-0000:00:0b.0-usb-0:1:1.0-scsi-0:0:0:0-part1
pci-0000:00:0b.0-usb-0:1:1.0-...
开源跳板机(堡垒机)Jumpserver v2.0.0 使用说明 - 开源 & Github - 清泛网 ...
...用来授权主机或者sudo，查看用户权限申请并处理的模块
3.1 授权主机组给用户组
授权管理 -- 小组授权 -- 选择用户组 -- 授权编辑
将刚才建立的主机组授权给该用户组
查看授权详情
3.2 测试授权
web登录建立的那个普...
pdf2htmlEX实现pdf转html - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...html和pdf视图下的截图：
windows下载地址：pdf2htmlEX-v1.0-win32-static
本人开发的一个功能：文档在线阅读，要求能够支持移动终端浏览器在线阅读。考虑过将文档先转pdf，然后在将pdf转swf，利用flexpaper在前端浏览器访问。但是...
How can I create a border around an Android LinearLayout?
...a file called customborder.xml in your drawable folder:
<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<corners android:radius="20dp"/>
<padding android:left="10dp" android:right="10dp"...
Using build types in Gradle to run same app that uses ContentProvider on one device
...build/generated/res/generated/debug/values/generated.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Automatically generated file. DO NOT MODIFY -->
<!-- Values from default config. -->
<item name="account_type" type="string">your.syncadapter.ty...
Java 反射最佳实践 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...法访问的类变量
调用不可访问的方法
三、解决方案
3.1 一行代码写反射
作为一个Android程序员，索性就拿TextView这个类开刀吧。首先定义一个类变量：
TextView mTv;
通过反射得到实例：
// 有参数，建立类
mTv = Reflect.on(Text...