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How to check whether a string is Base64 encoded or not
...ss than 4, the string is padded with '=' characters.
^([A-Za-z0-9+/]{4})* means the string starts with 0 or more base64 groups.
([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)$ means the string ends in one of three forms: [A-Za-z0-9+/]{4}, [A-Za-z0-9+/]{3}= or [A-Za-z0-9+/]{2}==.
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“Single-page” JS websites and SEO
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While #2 might be "easier" for you as a developer, it only provides search engine crawling. And yes, if Google finds out your serving different content, you might be penalized (I'm not an expert on that, but I have heard of it happening).
Both SEO and accessibility (not just for disable...
Use email address as primary key?
...bles, the foreign keys to the users table will be the e-mail address. That means that you store the e-mail address multiple times.
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Measuring text height to be drawn on Canvas ( Android )
...t contains the text fully with implicit start coordinates of 0, 0.
This means, that the height of, for example "Py" will be different from the height of "py" or "hi" or "oi" or "aw" because pixel-wise they require different heights.
This by no means is an equivalent to FontMetrics in classic ja...
Need for predictable random generator
...ay that a player has 20% chance to get a critical hit with his sword. That means, 1 out of 5 hits should be critical. The problem is I got very bad real life results — sometimes players get 3 crits in 5 hits, sometimes none in 15 hits. Battles are rather short (3-10 hits) so it's important to get ...
parseInt(null, 24) === 23… wait, what?
...haracters before the first such
character; otherwise, let Z be S.
That means that we handle all digits PRIOR to the specified radix and ignore everything else.
Basically, doing parseInt(null, 23) is the same thing as parseInt('null', 23). The u causes the two l's to be ignored (even though they...
Check if element exists in jQuery [duplicate]
...an element exists if the element is created by .append() method?
$('elemId').length doesn't work for me.
8 Answers
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Canvas width and height in HTML5
Is it possible to fix the width and height of an HTML5 canvas element?
4 Answers
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uwsgi invalid request block size
...ou start receiving “invalid request block size” in your logs, it could mean you need a bigger buffer. Increase it (up to 65535) with the buffer-size option.
If you receive ‘21573’ as the request block size in your logs, it could mean you are using the HTTP protocol to speak with an inst...
Use 'class' or 'typename' for template parameters? [duplicate]
...educe confusion, but for backward compatibility, class kept its overloaded meaning.
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