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Unable to install Maven on Windows: “JAVA_HOME is set to an invalid directory”

...\jdk\bin", then the JAVA_HOME variable needs to point to "E:\Sun\SDK\jdk". NB: JAVA_HOME should NOT end with "\bin"1. Make sure that you haven't put a semicolon in the JAVA_HOME variable2. NB: JAVA_HOME should be a single directory name, not "PATH-like" list of directory names separated by semicolo...
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Cluster analysis in R: determine the optimal number of clusters

...nd-diagnostics-for-cluster-analysis-r-code/ for more details. Eight. The NbClust package provides 30 indices to determine the number of clusters in a dataset. library(NbClust) nb <- NbClust(d, diss=NULL, distance = "euclidean", method = "kmeans", min.nc=2, max.nc=15, index = "...
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Determine a string's encoding in C#

...= 'A' && b[n] <= 'Z'))) { n++; } byte[] nb = new byte[n-oldn]; Array.Copy(b, oldn, nb, 0, n-oldn); try { string internalEnc = Encoding.ASCII.GetString(nb); text = Encoding.GetEncoding(internalEnc).GetString(b)...
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在ATL无窗口ActiveX 控件中如何使用定时器? - 其他 - 清泛IT社区,为创新赋能!

MFC中SetTimer设置定时器、OnTimer时间触发回调函数均是CWnd的成员函数,但前提是必须在有窗口的环境下。 对于ATL无窗口的情况,只能使用原始SetTimer Win32 API函数,如下: 回调函数: VOID CALLBACK TimerProc(     HWND hwnd, ...
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Sql server默认的端口是多少?如何开启远程连接? - 爬虫/数据库 - 清泛IT...

默认是1433,可以在配置管理器中查看: 需要开放1433端口,可以参考《Windows、Linux开放指定端口》。 另外,开启远程连接还需要启用TCP/IP,然后重启服务,步骤如下:
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nsis安装、卸载时如何判断程序是否正在运行 并提示关闭? - 脚本技术 - 清...

;-------------------------------------------------------------- !include logiclib.nsh FindProcDLL::FindProc "Test.exe" StrCmp $R0 1 0 +2 messagebox::show MB_SETFOREGROUND|MB_ICONHAND|MB_DEFBUTTON3|MB_TOPMOST "${PRODUCT_NAME}" "" \         ...
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MFC ComboBox控件如何在属性页中添加多项下拉数据? - C++ UI - 清泛IT社区...

如题。 运行效果:
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MFC如何实现Spin控件和Edit控件合用,实现Edit控件中数字的增减 - C++ UI - ...

菜单-Format- Tab Order(快捷键:Ctrl + D) 依次点各个控件,设置TabOrder,要求Edit应该在Spin前面并且相邻 Spin属性中设置 Alignment: Right Align Auto Buddy:True Set Buddy Integer: True 这样Edit控件和Spin控件就自动组合在一起了,如图: ...
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如何在Visual Studio中运行和调试汇编代码 - 其他 - 清泛IT社区,为创新赋能!

使用内联汇编__asm,如下: int _tmain(int argc, _TCHAR* argv[]) {         int a = 1;         __asm{                 xor eax, eax            &nbsp...