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How to save a plot as image on the disk?
...d like to save that image as PNG or JPEG, is it possible to do it automatically? (via code)
11 Answers
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Random float number generation
... will often not be sufficient if you need truly random numbers.
Before calling rand(), you must first "seed" the random number generator by calling srand(). This should be done once during your program's run -- not once every time you call rand(). This is often done like this:
srand (static_ca...
Uncaught ReferenceError: jQuery is not defined [duplicate]
...this problem when the certificate for the site expires. Today I got it and all of my sites started failing on refresh because of it. On your console you'll only see: ReferenceError: jQuery is not defined The problem is you won't find the cause until you look at the URL and see this: code.jquer...
Performance - Date.now() vs Date.getTime()
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These things are the same (edit semantically; performance is a little better with .now()):
var t1 = Date.now();
var t2 = new Date().getTime();
However, the time value from any already-created Date instance is frozen at the time of its construction (or at whateve...
How would I get a cron job to run every 30 minutes?
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I've always used */30 with success but I don't recall an application of mine where it was too critical if it only ran once an hour so I don't think I've ever checked.
– Adam Hawes
Feb 25 '09 at 5:39
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how to know if the request is ajax in asp.net mvc?
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All AJAX calls made by jQuery will have a header added to indicate it is AJAX. The header to check is X-Requested-With, and the value will be XMLHttpRequest when it is an AJAX call.
Note that AJAX requests are normal GETs or...
Minimum and maximum date
I was wondering which is the minimum and the maximum date allowed for a Javascript Date object. I found that the minimum date is something like 200000 B.C., but I couldn't get any reference about it.
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How can I detect whether an iframe is loaded?
...y on("load"). (Unfortunately, the docs don't quite make clear that that's all you need to do.)
– Teepeemm
Oct 5 '14 at 0:25
1
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Override Java System.currentTimeMillis for testing time sensitive code
... current time, as presented via System.currentTimeMillis , other than manually changing the system clock on the host machine?
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Remove textarea inner shadow on Mobile Safari (iPhone)
By default, it seems Mobile Safari adds the top inner shadow to all input fields, including textarea. Is there a way to remove it?
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