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How to establish a connection pool in JDBC?
...re using same object's to perform any action on Object-Data] & memory [allocating and de-allocating many objects creates a significant memory management overhead].
Object clean-up is not required as we are using same Object, reducing the Garbage collection load.
« Pooling [ Object pool, Strin...
Clearing a string buffer/builder after loop
...
It's well known that allocation (new keyword in Java) is more expensive than just changing some fields of the same object. For "mostly", which you could replave with highly, there's more than 1.5Billion of Android Devices, all using Java.
...
How can I make setuptools install a package that's not on PyPI?
...t;/<repo>.git
Github provides the ability to create personal OAuth tokens which can be cycled
git+https://<oauth token>:x-oauth-basic@github.com/<user>/<repo>.git
requirements.txt
requirements.txt is used to specify project dependencies:
requirements.txt
package1
pack...
How to launch Safari and open URL from iOS app
...has a scheme:
NSString* text = @"www.apple.com";
NSURL* url = [[NSURL alloc] initWithString:text];
if (url.scheme.length == 0)
{
text = [@"http://" stringByAppendingString:text];
url = [[NSURL alloc] initWithString:text];
}
[[UIApplication sharedApplication] openURL:url];
...
Python memory leaks [closed]
...
Tracemalloc module was integrated as a built-in module starting from Python 3.4, and appearently, it's also available for prior versions of Python as a third-party library (haven't tested it though).
This module is able to output ...
Deep copying an NSArray
...ly need a one-level-deep copy:
NSMutableArray *newArray = [[NSMutableArray alloc]
initWithArray:oldArray copyItems:YES];
The above code creates a new array whose members are shallow copies of the members of the old array.
Note that if you need to deeply copy an entire...
Get push notification while App in foreground iOS
...alert view.
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Did receive a Remote Notification" message:[NSString stringWithFormat:@"Your App name received this notification while it was running:\n%@",[[userInfo objectForKey:@"aps"] objectForKey:@"alert"]]delegat...
How to convert an int to string in C?
...
To be sure tat ENOUGH is enough we can do it by malloc(sizeof(char)*(int)log10(num))
– Hauleth
Nov 24 '11 at 13:25
2
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What is the best way to test for an empty string in Go?
...
TrimSpace will allocate and copy a new string from the original string, so this approach will introduce inefficiencies at scale.
– Dai
Apr 20 '18 at 1:16
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Should I use a data.frame or a matrix?
...ter in the code of the function only new values were recorded into already allocated spaces, and there was no overhead of adding new rows to the DF. This makes the comparison even more fair, and it also made my job simpler as I did not need to rewrite anything further in the function. Just one line ...