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What is a callback?
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In computer programming, a callback is executable code that is passed as an argument to other code.
—Wikipedia: Callback (computer science)
C# has delegates for that purpose. They are heavily used with events, as an event can automatical...
Extract public/private key from PKCS12 file for later use in SSH-PK-Authentication
I want to extract the public and private key from my PKCS#12 file for later use in SSH-Public-Key-Authentication.
7 Answ...
Create a “with” block on several context managers? [duplicate]
Suppose you have three objects you acquire via context manager, for instance A lock, a db connection and an ip socket.
You can acquire them by:
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How do I recursively delete a directory and its entire contents (files + sub dirs) in PHP?
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The user-contributed section in the manual page of rmdir contains a decent implementation:
function rrmdir($dir) {
if (is_dir($dir)) {
$objects = scandir($dir);
foreach ($objects as $object) {
if ($object != "." && $object != "..") {
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How to completely uninstall Android Studio on Mac?
... Studio on my Macbook Pro and I messed up with it every time I open it. It gives me plugin errors and several other errors. I need to uninstall it completely from my mac. I tried to delete it from my mac and then install it again as if you would do the first time, but it did nothing and now the same...
Checking the equality of two slices
How can I check if two slices are equal?
6 Answers
6
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What's the best way to add a drop shadow to my UIView
I am trying to add a drop shadow to views that are layered on top of one another, the views collapse allowing content in other views to be seen, in this vein i want to keep view.clipsToBounds ON so that when the views collapse their content is clipped.
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How can I change the EditText text without triggering the Text Watcher?
...field with a Customer Text Watcher on it. In a piece of code I need to change the value in the EditText which I do using .setText("whatever") .
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Laravel Migration Change to Make a Column Nullable
I created a migration with unsigned user_id . How can I edit user_id in a new migration to also make it nullable() ?
9 ...
Tick symbol in HTML/XHTML
...✓ or ✔) within an internal web app and would ideally like to avoid using an image.
14 Answers
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