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Proper use of beginBackgroundTaskWithExpirationHandler
... If you call doUpdate multiple times in a row without the work is done, you will overwrite self.backgroundUpdateTask so previous tasks can't be ended properly. You should either store the task identifier each time so you end it properly or use a counter in the begin/end methods.
...
Save PL/pgSQL output from PostgreSQL to a CSV file
... of bounds" will be fully accessible. You probably don’t want to let someone invoke your function and add rows on the end of your “users” table…
I've written a blog post expanding on this approach, including some examples of functions that export (or import) files and tables meeting strict...
Bold & Non-Bold Text In A Single UILabel?
...om: date))
// Find the range of the non-bold part
formatter.timeStyle = .none
let nonBoldRange = targetString.range(of: formatter.string(from: date))
// Convert Range<Int> into NSRange
let nonBoldNSRange: NSRange? = nonBoldRange == nil ?
nil :
NSMakeRange(targetString.distance(from: ...
Clear icon inside input text
...idth: 100%;
box-sizing: border-box;
}
.clearable__clear{
display: none;
position: absolute;
right:0; top:0;
padding: 0 8px;
font-style: normal;
font-size: 1.2em;
user-select: none;
cursor: pointer;
}
.clearable input::-ms-clear { /* Remove IE default X */
display: ...
General guidelines to avoid memory leaks in C++ [closed]
...
To compile using g++ one needs to add param: -std=c++0x
– Paweł Szczur
Nov 28 '12 at 16:25
...
Can someone explain the traverse function in Haskell?
...able to see its point. Since I come from an imperative background, can someone please explain it to me in terms of an imperative loop? Pseudo-code would be much appreciated. Thanks.
...
How to create an installer for a .net Windows Service using Visual Studio
...ll add an installer project file to your project.
Then you will have 2 components on the design view of the ProjectInstaller.cs (serviceProcessInstaller1 and serviceInstaller1). You should then setup the properties as you need such as service name and user that it should run as.
Now you need to mak...
Generating random integer from a range
...]. I've used the new std <chrono> facilities to time it as you mentioned performance is a major concern for you.
#include <iostream>
#include <random>
#include <chrono>
int main()
{
typedef std::chrono::high_resolution_clock Clock;
typedef std::chrono::duration<...
Increasing the maximum number of TCP/IP connections in Linux
...applications by increasing the FD ulimts, in the shell.
Besides the above one more popular technique used by programmers is to reduce the number of tcp write calls. My own preference is to use a buffer wherein I push the data I wish to send to the client, and then at appropriate points I write out ...
How do you load custom UITableViewCells from Xib files?
...sableCell(withIdentifier:for:) has the new behavior, if you call the other one (without indexPath:) you get the old behavior, in which you need to check for nil and instance it yourself, notice the UITableViewCell? return value.
if let cell = tableView.dequeueReusableCell(withIdentifier: "cell", f...