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Select Pandas rows based on list index
...
For large datasets, it is memory efficient to read only selected rows via the skiprows parameter.
Example
pred = lambda x: x not in [1, 3]
pd.read_csv("data.csv", skiprows=pred, index_col=0, names=...)
This will now return a DataFrame from a file that skips all rows exc...
Techniques for Tracing Constraints
... could try GHC's debugging flags, in particular, -ddump-tc-trace, and then read through the resulting log to see where Internal (a -> b) ~ t and (Internal a -> Internal a) ~ t are added to the Wanted set, but that will be quite a long read.
...
libcurl网络连接使用tcp/ip - C/C++ - 清泛网 - 专注C/C++及内核技术
...rn 1;
}
sockfd = sockextr;
/* wait for the socket to become ready for sending */
//if(!wait_on_socket(sockfd, 0, 60000L))
//{
// printf("Error: timeout.\n");
// return 1;
//}
puts("Sending request.");
/* Send the request. Real applications should c...
AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
BOOL AfxIsValidAddress(
const void* lp,
UINT nBytes,
BOOL bReadWrite = TRUE
);
Parameters
lp
Points to the memory address to be tested.
指向被测试内存。
nBytes
Contains the number of bytes of memory to be tested.
...
MiniDumpWriteDump 记录dmp文件的简单实例（附调试方法） - C/C++ - 清泛网...
...inute,
st.wSecond);
HANDLE hDmpFile = ::CreateFileA(szFile, GENERIC_READ|GENERIC_WRITE, FILE_SHARE_WRITE|FILE_SHARE_READ, 0, CREATE_ALWAYS, 0, 0);
MINIDUMP_EXCEPTION_INFORMATION stInfo = {0};
stInfo.ThreadId = GetCurrentThreadId();
stInfo.ExceptionPointers = pExceptionPointers;
stInfo...
CentOS系统下如何挂载第2块磁盘 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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auto: 系统自动挂载，fstab默认就是这个选项
ro: read-only
rw: read-write
defaults: rw, suid, dev, exec, auto, nouser, and async.
5.第5列为dump选项，设置是否让备份程序dump备份文件系统，0为忽略，1为备份。
6.第6列为fsck...
mac Xcode如何修改Organization Name(缺省公司名称/开发人员名称)？ - 更多...
...MacroDefinitions '{"ORGANIZATIONNAME" = "公司名字";}'
通过 defaults read com.apple.Xcode 或 defaults read com.apple.Xcode PBXCustomTemplateMacroDefinitions，能阅读出数据。
修改 company identifier / organization name
然后 company identifier / organization name 默认是你上一...
Java 调用外部进程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...tData(final InputStream inputStream, final String prefix) {
new Thread() {
public void run() {
try {
StringBuilder builder = new StringBuilder();
int c = inputStream.read();
while (c >= 0) {
...
php 遍历目录批量转换文件编码 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...)
{
// echo $fileName;
if (file_exists($fileName)) {
// Read in the contents
$res = file_get_contents($fileName);
$i = pathinfo($fileName);
if(!in_array($i['extension'],array('js','css','php','html','htm'))){
return ;
}
// ...
改用 443 端口连接 Github 修复 git push 时出现 Connection timed out 的...
...: connect to host github com port 22: Connection timed outfatal: Could not read
参考资料
最近几天我这里出现了 git push 出现 timeout 的问题：
$ git push
ssh: connect to host github.com port 22: Connection timed out
fatal: Could not read from remote repository.
...