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How to save a PNG image server-side, from a base64 data string
..., $data));
An efficient method for extracting, decoding, and checking for errors is:
if (preg_match('/^data:image\/(\w+);base64,/', $data, $type)) {
$data = substr($data, strpos($data, ',') + 1);
$type = strtolower($type[1]); // jpg, png, gif
if (!in_array($type, [ 'jpg', 'jpeg', 'gif'...
What is the equivalent of Java's final in C#?
...e - failing to assign V or assigning V two or more times will result in an error.
C#'s readonly keyword has no such guarantee - the compiler is more than happy to leave readonly members unassigned or allow you to assign them multiple times within a constructor.
So, final and readonly (at least wit...
Proper way to make HTML nested list?
...the <li> it belongs in.
If you validate, option 1 comes up as an error in html 5 -- credit: user3272456
Correct: <ul> as child of <li>
The proper way to make HTML nested list is with the nested <ul> as a child of the <li> to which it belongs. The nested list s...
Any reason not to start using the HTML 5 doctype? [closed]
...ML5 doctype without going into quirks mode.
– Syntax Error
Jul 14 '10 at 21:53
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How do I set up a simple delegate to communicate between two view controllers?
...unately, I'm getting a "Cannot find protocol declaration for 'MyProtocol'" error when I try to compile. It's as you described, though: the spawned viewcontroller has the procotol definition in its .h file and invokes the protocol method in its .m file. The hosting viewcontroller has <MyProtocol...
Detect and exclude outliers in Pandas data frame
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Got error: "TypeError: unsupported operand type(s) for /: 'str' and 'int'"
– sak
Jul 19 '19 at 4:41
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CodeIgniter: Create new helper?
... the helper file name is appended with "_helper" otherwise you will get an error. So "helper_name" wont work but name your file "name_helper".
– Bhumi Singhal
Dec 11 '12 at 10:06
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What is the proper way to test if a parameter is empty in a batch file?
...s in the argument, otherwise you will get a …was unexpected at this time error.
– Synetech
Feb 4 '13 at 19:41
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Debugging WebSocket in Google Chrome
... and then you can see the Frames (now called Messages) which will show you error messages etc.
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Comparing two dictionaries and checking how many (key, value) pairs are equal
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Same error if there is list element for the dict key. I think cmp is better way to do it unless I am missing anything.
– Mutant
Sep 22 '15 at 20:22
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