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Identify duplicates in a List
... to consider the load factor, e.g. when you specify an initial capacity of 100, because you want to add that number of elements, it gets rounded to the next power of 2 (128), which implies that with the default load factor of 0.75f, the resize threshold will be 96, so there will be a resize before y...
Make function wait until element exists
...) {
console.log("Exists!");
clearInterval(checkExist);
}
}, 100); // check every 100ms
But note - many times 3rd party code has an option to activate your code (by callback or event triggering) when it finishes to load. That may be where you can put your function. The interval solu...
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>
...
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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Effects of changing Django's SECRET_KEY
...| tr -dc 'A-Za-z0-9!"#$%&\''()*+,-./:;<=>?@[\]^_`{|}~' | head -c 100 ; echo
At this point I thought why not try a larger key, so I tried it with a 100 and 1000 long key. Both worked. If I understand the source code, the object returned by the signer function is a hmac hash in base64. RFC...
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
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