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How to save an HTML5 Canvas as an image on a server?
...ntext.stroke();
</script>
Convert canvas image to URL format (base64)
var dataURL = canvas.toDataURL();
Send it to your server via Ajax
$.ajax({
type: "POST",
url: "script.php",
data: {
imgBase64: dataURL
}
}).done(function(o) {
con...
Python unittest - opposite of assertRaises?
...PathIsNotAValidOne would be raised.
I believe that using the above code (based heavily on DGH's answer) will do that.
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How can I time a code segment for testing performance with Pythons timeit?
...())
def main():
objs = globals()
funcs = []
f = open("timeit_demo.sh", "w+")
for objname in objs:
if objname != 'main' and type(objs[objname]) == types.FunctionType:
funcs.append(objname)
funcs.sort()
for func in funcs:
f.write('''echo "Timing: ...
What integer hash function are good that accepts an integer hash key?
...o use the following, even thought it might not be the fastest. This one is based on splitmix64, which seems to be based on the blog article Better Bit Mixing (mix 13).
uint64_t hash(uint64_t x) {
x = (x ^ (x >> 30)) * UINT64_C(0xbf58476d1ce4e5b9);
x = (x ^ (x >> 27)) * UINT64_C...
Best way to iterate through a Perl array
...
Demo; perl -MDevel::Peek -e'my @a; Dump(\@a,1); @a=qw( a b c ); Dump(\@a,1); @a=(); Dump(\@a,1); undef @a; Dump(\@a,1);' 2>&1 | grep ARRAY
– ikegami
May 7 '12 at 20:06
...
To underscore or to not to underscore, that is the question
... I've done both ways and I wanted to make up my mind, one and for all, based on knowledge :P
– TheCodeJunkie
Jan 16 '09 at 12:35
47
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Is it possible to make abstract classes in Python?
...rties as using the abc module does. You can still instantiate the abstract base class itself, and you won't find your mistake until you call the abstract method at runtime.
But if you're dealing with a small set of simple classes, maybe with just a few abstract methods, this approach is a little e...
Is it possible to apply CSS to half of a character?
...0px; /* or any font size will work */
color: transparent; /* hide the base character */
overflow: hidden;
white-space: pre; /* to preserve the spaces from collapsing */
}
.halfStyle:before { /* creates the left part */
display: block;
z-index: 1;
position: absolute;...
Image Greyscale with CSS & re-color on mouse-over?
...gt;</a>
This could also be accomplished by using a Javascript-based hover effect such as jQuery's hover() function in the same manner.
Consider a Third-Party Library
The desaturate library is a common library that allows you to easily switch between a grayscale version and full-colore...
How can I hash a password in Java?
I need to hash passwords for storage in a database. How can I do this in Java?
13 Answers
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