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Dump a NumPy array into a csv file
...ne
with open('example.csv', 'w') as fp:
fp.write('''\
col1,col2,col3
1,100.1,string1
2,222.2,second string
''')
# Read it as a Numpy record array
ar = np.recfromcsv('example.csv')
print(repr(ar))
# rec.array([(1, 100.1, 'string1'), (2, 222.2, 'second string')],
# dtype=[('col1', '<...
changing source on html5 video tag
...').innerHTML = '<video autoplay controls id="video_ctrl" style="height: 100px; width: 100px;"><source src="'+src+'" type="video/mp4"></video>';
document.getElementById('video_ctrl').play();
}
</script>
<button onClick="setvideo('video1.mp4');">Video1</button>
...
Why does Java switch on contiguous ints appear to run faster with added cases?
... ; - javaapplication4.Test1::multiplyByPowerOfTen@278 (line 100)
; {section_word}
0x0000000002524611: jmp 0x0000000002524744
0x0000000002524616: mulsd xmm0,QWORD PTR [rip+0xfffffffffffffdfa] # 0x0000000002524418
...
如何建立一套适合自己的高胜算交易系统 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...成败。
2:得失核心
不同的资金起点，有不同的得失。如100万与3万，年一倍，其交易次序是一致的，但掌握100万的个体，其将收益目标降低到年50%，其收益高于3万翻倍许多，其心理要求和技术要求就会大幅度的降低。因此，导...
How to convert latitude or longitude to meters?
...ath.atan2(Math.sqrt(a), Math.sqrt(1-a));
var d = R * c;
return d * 1000; // meters
}
Explanation: https://en.wikipedia.org/wiki/Haversine_formula
The haversine formula determines the great-circle distance between two points on a sphere given their longitudes and latitudes.
...
Dashed line border around UIView
...code:
let v = UIViewWithDashedLineBorder(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
Result:
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Replace whole line containing a string using Sed
...{FILE}"
sed -i '/'"${OLD_LINE_PATTERN}"'/{s/.*/'"${NEW}"'/;h};${x;/./{x;q100};x}' "${FILE}"
if [[ $? -ne 100 ]] && [[ ${NEW_LINE} != '' ]]
then
echo "${NEW_LINE}" >> "${FILE}"
fi
}
the crazy exit status magic comes from https://stackoverflow.com/a/12145797/1262663
...
How do I create a basic UIButton programmatically?
...nTypeRoundedRect] retain];
playButton.frame = CGRectMake(110.0, 360.0, 100.0, 30.0);
[playButton setTitle:@"Play" forState:UIControlStateNormal];
playButton.backgroundColor = [UIColor clearColor];
[playButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal ];
UII...
Responsively change div size keeping aspect ratio [duplicate]
...ormula (for example using a 22:5 ratio where 22 is A and 5 is B): B / (A / 100) = C%. So 22:5 is 5 / .22 = 22.72%.
– Dreamdealer
Mar 14 '14 at 13:21
1
...
How to get progress from XMLHttpRequest
...e progress on screen
var percentComplete = (evt.loaded / evt.total) * 100;
$('#progressbar').progressbar( "option", "value", percentComplete );
}
}
function sendreq(evt)
{
var req = new XMLHttpRequest();
$('#progressbar').progressbar();
req.onprogress = updateP...