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@synthesize vs @dynamic, what are the differences?
...it
{
if ((self = [super init])) {
data = [[NSMutableDictionary alloc] init];
[data setObject:@"Tom Sawyer" forKey:@"title"];
[data setObject:@"Mark Twain" forKey:@"author"];
}
return self;
}
- (void)dealloc
{
[data release];
[super dealloc];
}
- (NSMetho...
Creating an R dataframe row-by-row
...g structures is one of the least efficient ways to code in R.
If you can, allocate your entire data.frame up front:
N <- 1e4 # total number of rows to preallocate--possibly an overestimate
DF <- data.frame(num=rep(NA, N), txt=rep("", N), # as many cols as you need
strings...
How to find the php.ini file used by the command line?
I need to enable pdo_mysql in my EasyPhp environment, so I went to php.ini file and uncommented the following line:
14 Answ...
Is it safe to delete a NULL pointer?
...ter delete. Setting a pointer to NULL after deleting it masquerades memory allocation errors, which is a very bad thing. A program that is correct does not delete a pointer twice, and a program that does delete a pointer twice should crash.
– Damon
Aug 30 '13 a...
UIRefreshControl without UITableViewController
...gically just works!
UIRefreshControl *refreshControl = [[UIRefreshControl alloc] init];
[refreshControl addTarget:self action:@selector(handleRefresh:) forControlEvents:UIControlEventValueChanged];
[self.myTableView addSubview:refreshControl];
This adds a UIRefreshControl above your table view an...
IE 8: background-size fix [duplicate]
...Method='scale')";
However, this scales the entire image to fit in the allocated area. So
if your using a sprite, this may cause issues.
Caution
The filter has a flaw, any links inside the allocated area are no longer clickable.
...
Is there a documented way to set the iPhone orientation?
...ish to use undocumented methods:
UIViewController *c = [[UIViewController alloc]init];
[self presentModalViewController:c animated:NO];
[self dismissModalViewControllerAnimated:NO];
[c release];
It is sufficient to present and dismiss a vanilla view controller.
Obviously you'll still need to con...
How to get the size of a string in Python?
...rint(len('please anwser my question'))
25
B. To get memory size in bytes allocated to store str object, you can use sys.getsizeof() function
>>> from sys import getsizeof
>>> print(getsizeof('please anwser my question'))
50
Python 2:
It gets complicated for Python 2.
A. The...
window+nginx+php-cgi的php-cgi线程/子进程问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
window+nginx+php-cgi的php-cgi线程/子进程问题见bbshttp: bbs csdn net topics 390803643 close正常的配置情况下,window的php-cgi是不会出现多线程 子进程的,例如以下配置fastcgi_pass 见bbs
http://bbs.csdn.net/topics/390803643/close
正常的配置情况下,window...
How to get current time and date in C++?
...
@Petr you only need to call delete on memory allocated with new.
– iheanyi
Aug 15 '14 at 16:52
4
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