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What does the variable $this mean in PHP?
... //member method
//Assign data to member variable from inside the member method
$this->my_member_variable = "whatever";
//Get data from member variable from inside the member method.
print $this->my_member_variable;
}
}
$this is reference...
How can I return to a parent activity correctly?
... activities (A and B) in my android application and I use an intent to get from activity A to activity B. The use of parent_activity is enabled:
...
How do I create a custom iOS view class and instantiate multiple copies of it (in IB)?
...version; You should even be able to copy & paste your views as a whole from your existing interface to the .xib file.
To test this out I created a new empty .xib named "MyCustomTimerView.xib". Then I added a view, and to that added a label and two buttons. Like So:
I created a new objective-...
Meaning of “[: too many arguments” error from if [] (square brackets)
... shells called by /bin/sh etc.
This means on some systems, it might work from the console but not when called elsewhere, like from cron, depending on how everything is configured.
It would look like this:
VARIABLE=$(/some/command);
if [[ $VARIABLE == 0 ]]; then
# some action
fi
If your com...
How to serve static files in Flask
...l be able to do it more efficiently than Flask.
However, you can use send_from_directory to send files from a directory, which can be pretty convenient in some situations:
from flask import Flask, request, send_from_directory
# set the project root directory as the static folder, you can set othe...
npm install errors with Error: ENOENT, chmod
...nstall an npm module I just published. Every time I try to install, either from npm or the folder, I get this error.
29 Ans...
Xcode suddenly stopped running project on hardware: “Could not launch xxx.app: .. No such file..” [c
...s stopped being able to run my app, it started directly after I deleted it from the device and attempted to re-install by rerunning it in Xcode (something I've done hundreds of times before).
...
Measuring the distance between two coordinates in PHP
...etween two points, with
* the Haversine formula.
* @param float $latitudeFrom Latitude of start point in [deg decimal]
* @param float $longitudeFrom Longitude of start point in [deg decimal]
* @param float $latitudeTo Latitude of target point in [deg decimal]
* @param float $longitudeTo Longitu...
HashMap with multiple values under the same key
...dd(new Person("Bob Jones"));
peopleByForename.put("Bob", people);
// read from it
List<Person> bobs = peopleByForename["Bob"];
Person bob1 = bobs[0];
Person bob2 = bobs[1];
The disadvantage with this approach is that the list is not bound to exactly two values.
2. Using wrapper class
// d...
How do I remove duplicates from a C# array?
I have been working with a string[] array in C# that gets returned from a function call. I could possibly cast to a Generic collection, but I was wondering if there was a better way to do it, possibly by using a temp array.
...