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Element-wise addition of 2 lists?
...how to do this in pure python. If you want to do this with arrays with 100.000 elements, you should use numpy:
In [1]: import numpy as np
In [2]: vector1 = np.array([1, 2, 3])
In [3]: vector2 = np.array([4, 5, 6])
Doing the element-wise addition is now as trivial as
In [4]: sum_vector = vector1 ...
How do you delete a column by name in data.table?
...ypasses data.table advantages but if you're working with less than say 500,000 rows it works fine
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Outline radius?
...ration: none;
color: #fff;
position: relative;
border: 2px solid #000;
}
a:after {
content: '';
display: block;
position: absolute;
top: 0;
bottom: 0;
left: 0;
right: 0;
border-radius: 5px;
border: 2px solid #ccc;
}
<a href="#">Button</a>
...
Smooth scrolling when clicking an anchor link
...ript link like <a href="javascript:$('#test').css('background-color', '#000')">Test</a>. You should rather use $('a[href^=#]') to match all urls that start with a hash character.
– Martin Braun
Apr 3 '16 at 17:58
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JAXB creating context and marshallers cost
...matter of a very large number of xml files (we're talking here of about 10,000 xml requests per minute); in that case creating the context just once gaining those little ms makes a huge difference
– tbarderas
Sep 14 '15 at 14:55
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How might I find the largest number contained in a JavaScript array?
...ou're talking millions of indices.
Average results of five runs with a 100,000-index array of random numbers:
reduce took 4.0392 ms to run
Math.max.apply took 3.3742 ms to run
sorting and getting the 0th value took 67.4724 ms to run
Math.max within reduce() took 6.5804 ms to run
custom findmax func...
Format number to always show 2 decimal places
...(Math.round(num3 * 100) / 100).toFixed(2);
span {
border: 1px solid #000;
margin: 5px;
padding: 5px;
}
<span id="num1"></span>
<span id="num2"></span>
<span id="num3"></span>
Note that it will round to 2 decimal places, so the input 1.34...
What is the tilde (~) in the enum definition?
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@Stevo3000: Int32.MinValue is 0xF0000000, which is not ~0 (it's actually ~Int32.MaxValue)
– Jimmy
Apr 25 '09 at 0:38
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Background color not showing in print preview
...spacing:0.2px; font: 12px Arial, Helvetica,"Lucida Grande", serif; color: #000;}.... you need to add it in there...
– Riskbreaker
Feb 28 '13 at 19:14
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JetBrains / IntelliJ keyboard shortcut to collapse all methods
I'm working on some legacy code that has a class that is 10,000+ lines of code and has 100s of methods. Is there a shortcut for any JetBrains IDE (since the shortcut would likely be shared across all of them) to collapse all the methods / functions so that only the method signatures are shown?
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