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How to draw a rounded Rectangle on HTML Canvas?
... "rgb(255, 0, 0)";
ctx.fillStyle = "rgba(255, 255, 0, .5)";
roundRect(ctx, 100, 5, 100, 100, 20, true);
// Manipulate it again
ctx.strokeStyle = "#0f0";
ctx.fillStyle = "#ddd";
// Different radii for each corner, others default to 0
roundRect(ctx, 300, 5, 200, 100, {
tl: 50,
br: 25
}, true);
/*...
How to pass a function as a parameter in Java? [duplicate]
...hing
}
then call it, perhaps using an anonymous inner class:
dansMethod(100, new Callable<Integer>() {
public Integer call() {
return methodToPass();
}
});
Keep in mind this is not a 'trick'. It's just java's basic conceptual equivalent to function pointers.
...
Turn a number into star rating display using jQuery and CSS
...
.stars-80:after { width: 80%; }
.stars-90:after { width: 90%; }
.stars-100:after { width: 100; }
Within block level elements:
<div><span class="stars-container stars-0">★★★★★</span></div>
<div><span class="stars-container stars-10">★★★★...
MySQL Query GROUP BY day / month / year
..._date), MONTH(record_date), COUNT(*)
FROM stats
GROUP BY YEAR(record_date)*100 + MONTH(record_date)
I compared these versions on a big table with 1,357,918 rows (innodb),
and the 2nd version appears to have better results.
version1 (average of 10 executes): 1.404 seconds
version2 (average of 10...
How to calculate the SVG Path for an arc (of a circle)
...e
document.getElementById("arc1").setAttribute("d", describeArc(200, 400, 100, 0, 180));
and in your html
<path id="arc1" fill="none" stroke="#446688" stroke-width="20" />
Live demo
share
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...
Warning message: In `…` : invalid factor level, NA generated
... of 2 variables:
$ Type : Factor w/ 1 level "": NA 1 1
$ Amount: chr "100" "0" "0"
>
> fixed <- data.frame("Type" = character(3), "Amount" = numeric(3),stringsAsFactors=FALSE)
> fixed[1, ] <- c("lunch", 100)
> str(fixed)
'data.frame': 3 obs. of 2 variables:
$ Type : chr ...
Most efficient way to store thousand telephone numbers
...f phone numbers for which the first m bits are 1...11 - this last count is 1000(decimal). There are 2^m such counts and each count is at most 1000. If we omit the last one (because we know it is 1000 anyway), we can store all of these numbers in a contiguous block of (2^m - 1) * 10 bits. (10 bits is...
Create an empty object in JavaScript with {} or new Object()?
... Array(); over []; - with one minor exception:
var emptyArray = new Array(100);
creates a 100 item long array with all slots containing undefined - which may be nice/useful in certain situations (such as (new Array(9)).join('Na-Na ') + 'Batman!').
My recommendation
Never use new Object(); - i...
在 App Inventor 2 中使用图像 · App Inventor 2 中文网
...字节，这在 Android 中很典型）需要 900×26×4 = 93600 或大约 100 千字节，这将很容易适应手机内存。
另一方面，假设每个字母都是从高分辨率图像加载到应用程序媒体中的，每个图像的大小为 1000 像素 × 1000 像素。每个这样的图像...
How to clear the interpreter console?
...
Well, here's a quick hack:
>>> clear = "\n" * 100
>>> print clear
>>> ...do some other stuff...
>>> print clear
Or to save some typing, put this file in your python search path:
# wiper.py
class Wipe(object):
def __repr__(self):
...