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Long press gesture on UICollectionViewCell
...llectionView];
NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:p];
if (indexPath == nil){
NSLog(@"couldn't find index path");
} else {
// get the cell at indexPath (the one you long pressed)
UICollectionViewCell* cell =
[...
How do I get git to default to ssh and not https for new repositories
...git remote set-url origin git@github.com:nikhilbhardwaj/abc.git
More information about the SSH-HTTPS switch
"Why is Git always asking for my password?" - GitHub help page.
GitHub's switch to Smart HTTP - relevant StackOverflow question
Credential Caching for Wrist-Friendly Git Usage - GitHub b...
pandas: multiple conditions while indexing data frame - unexpected behavior
...in terms of what you want to keep, not in terms of what you want to drop. For df1:
df1 = df[(df.a != -1) & (df.b != -1)]
You're saying "keep the rows in which df.a isn't -1 and df.b isn't -1", which is the same as dropping every row in which at least one value is -1.
For df2:
df2 = df[(df....
Java: Integer equals vs. ==
...The JVM is caching Integer values. Hence the comparison with == only works for numbers between -128 and 127.
Refer: #Immutable_Objects_.2F_Wrapper_Class_Caching
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SHFileOperation 这个API函数怎么用起来结果飘忽不定？ - C/C++ - 清泛网 -...
...dNextFile，支持 * 通配符查找文件，核心代码如下：
WIN32_FIND_DATA FindFileData;
char szCurPath[MAX_PATH + 1] = { 0 };
GetCurrentDirectory(MAX_PATH, szCurPath);
CString findFileName;
findFileName.Format("%stest*.txt", szCurPath);
HANDLE hFind = ::FindFirstFile(findFileName,...
C++虚析构函数解析 - C/C++ - 清泛网 - 专注C/C++及内核技术
...类的状况发生。
以下内容转自： http://blog.sina.com.cn/s/blog_7c773cc50100y9hz.html
a.第一段代码
#include<iostream>
using namespace std;
class ClxBase{
public:
ClxBase() {};
~ClxBase() {cout << "Output from the destructor of class ClxBase!" << endl;};
void ...
VC/Linux C++ 递归访问目录下所有文件 - c++1y / stl - 清泛IT社区，为创新赋能！
...，部分代码如下：find(char * lpPath)
{
char szFind[MAX_PATH];
WIN32_FIND_DATA FindFileData;
strcpy(szFind,lpPath);
strcat(szFind,"\\*.*");
HANDLE hFind=::FindFirstFile(szFind,&FindFileData);
if...
libunwind：记录程序崩溃堆栈 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
....la
make
make install
记录堆栈的代码如下：
static void log_backtrace(void) {
char name[256];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
syslog(LOG_ERR, "--illegal memory access--");
while(unw_...
求助！关于拓展模块NotificationStyle的demo运行时报错的问题 - App Invent...
...aicompanion3: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly consider using FLAG_IMMUTABLE, only use FLAG_MUTABLE if some functionality depends on the PendingIntent being mutable, e.g. if it needs to be use...
Visual Studio loading symbols
I'm working on a ColdFusion project for a while now, and Visual Studio started to behave strange for me at least.
16 Answ...