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Delete an element from a dictionary
...style, but let's talk frankly: the only one man had wrote this sample, and 1000 have read this. I think, it would be great to write examples in the way allowing easy copy and run. I don't like to remove this angle brackets by hand. Or copy line by line.. So I don't understand: why this angles are st...
Why is `[` better than `subset`?
...ironment:
cyl <- 4
subscramble(mtcars, cyl == 4)
cyl <- sample(10, 100, rep = T)
subscramble(mtcars, cyl == 4)
(Run them and see for yourself, it's pretty crazy.)
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pyplot scatter plot marker size
...it make more sense if increasing the size linearly (ex. s=[20, 40, 60, 80, 100, 120]) gave us the linear-looking result?
– Emma
Oct 22 '13 at 20:20
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New Array from Index Range Swift
...;1] // returns [1] assert(arr[safe: 0..<1] == [1])
arr[safe: 2..<100] // returns [3] assert(arr[safe: 2..<100] == [3])
arr[safe: -100..<0] // returns [] assert(arr[safe: -100..<0] == [])
arr[safe: 0, 1] // returns [1] assert(arr[safe: 0, 1] == [1])
arr[safe: 2, 100] //...
How To Save Canvas As An Image With canvas.toDataURL()?
....fillStyle = "rgba(125, 46, 138, 0.5)";
ctx.fillRect(25,25,100,100);
ctx.fillStyle = "rgba( 0, 146, 38, 0.5)";
ctx.fillRect(58, 74, 125, 100);
}
function to_image(){
var canvas = document.getElementById("thecan...
Draw multi-line text to Canvas
...text on the next line. So something like this:
canvas.drawText("This is", 100, 100, mTextPaint);
canvas.drawText("multi-line", 100, 150, mTextPaint);
canvas.drawText("text", 100, 200, mTextPaint);
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Convert a negative number to a positive one in JavaScript
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@omgaz They aren't the same... var x = -100; ~x+1 === 100 but var x = 100; ~x+1 === -100. Math.abs always makes it a positive whilst taking the ones complement simply inverts the sign.
– jduncanator
Dec 18 '14 at 12:53
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How is location accuracy measured in Android?
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@AidenStrydom, no. If the accuracy returns 1000, it means there is a 68% chance that the real location is within 1000 meters of the provided location.
– karl
Jul 31 '13 at 23:00
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Python style - line continuation with strings? [duplicate]
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Sven MarnachSven Marnach
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Get last n lines of a file, similar to tail
...Here is my answer. Pure python. Using timeit it seems pretty fast. Tailing 100 lines of a log file that has 100,000 lines:
>>> timeit.timeit('tail.tail(f, 100, 4098)', 'import tail; f = open("log.txt", "r");', number=10)
0.0014600753784179688
>>> timeit.timeit('tail.tail(f, 100, 4...