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Select by partial string from a pandas DataFrame
...ise, regex search is slower than substring search:
df2 = pd.concat([df1] * 1000, ignore_index=True)
%timeit df2[df2['col'].str.contains('foo')]
%timeit df2[df2['col'].str.contains('foo', regex=False)]
6.31 ms ± 126 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
2.8 ms ± 241 µs per l...
Is a view faster than a simple query?
...ten need to report sales for tax purposes and we find that we've only sold 100 copies of our software in our home country. By creating an indexed view of just the Lithuanian records, we get to keep the records we need in an indexed cache as described in the MS documentation. When we run our reports...
Specifying and saving a figure with exact size in pixels
...ixels, you could do the following:
plt.figure(figsize=(3.841, 7.195), dpi=100)
( your code ...)
plt.savefig('myfig.png', dpi=1000)
Note that I used the figure dpi of 100 to fit in most screens, but saved with dpi=1000 to achieve the required resolution. In my system this produces a png with 3840x...
How do I add a tool tip to a span element?
...
100
Custom Tooltips with pure CSS - no JavaScript needed:
Example here (with code) / Full screen ...
Cross-browser custom styling for file upload button [duplicate]
...
label.myLabel input[type="file"] {
position:absolute;
top: -1000px;
}
/***** Example custom styling *****/
.myLabel {
border: 2px solid #AAA;
border-radius: 4px;
padding: 2px 5px;
margin: 2px;
background: #DDD;
display: inline-block;
}
.myLabel:hov...
What's the best online payment processing solution? [closed]
....9% to 2.9% + $0.30 USD (2.9% for up to $30,000/month, 1.9% for more than $100,000/month)
Without factoring in the 20/30 cents, Paypal is just barely cheaper if you sell more than $100,000 per month, and spend nothing on adwords.
...
WaitAll vs WhenAll
... Task[] taskArray = { Task.Factory.StartNew(() => WaitAndThrow(1, 1000)),
Task.Factory.StartNew(() => WaitAndThrow(2, 2000)),
Task.Factory.StartNew(() => WaitAndThrow(3, 3000)) };
Task.WaitAll(taskArray);
...
How do I write a custom init for a UIView subclass in Swift?
...= s
self.i = i
super.init(frame: CGRect(x: 0, y: 0, width: 100, height: 100))
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
}
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Javascript calculate the day of the year (1 - 366)
... new Date(now.getFullYear(), 0, 0);
var diff = now - start;
var oneDay = 1000 * 60 * 60 * 24;
var day = Math.floor(diff / oneDay);
console.log('Day of year: ' + day);
Edit: The code above will fail when now is a date in between march 26th and October 29th andnow's time is before 1AM (eg 0...
Compute a confidence interval from sample data
...mean.
This assumes the sample size is big enough (let's say more than ~100 points) in order to use the standard normal distribution rather than the student's t distribution to compute the z value.
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