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new DateTime() vs default(DateTime)
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ServyServy
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Quickly reading very large tables as dataframes
I have very large tables (30 million rows) that I would like to load as a dataframes in R. read.table() has a lot of convenient features, but it seems like there is a lot of logic in the implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead o...
JavaScript exponents
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130
Math.pow():
js> Math.pow(12, 2)
144
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How to map and remove nil values in Ruby
...t to become the norm very soon.
For example:
numbers = [1, 2, 5, 8, 10, 13]
enum.filter_map { |i| i * 2 if i.even? }
# => [4, 16, 20]
In your case, as the block evaluates to falsey, simply:
items.filter_map { |x| process_x url }
"Ruby 2.7 adds Enumerable#filter_map" is a good read on the s...
ReactJS: Modeling Bi-Directional Infinite Scrolling
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3 Answers
3
Active
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Possible to make labels appear when hovering over a point in matplotlib?
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138
It seems none of the other answers here actually answer the question. So here is a code that us...
Change color of PNG image via CSS?
... the color of a PNG file with filters.
body {
background-color:#03030a;
min-width: 800px;
min-height: 400px
}
img {
width:20%;
float:left;
margin:0;
}
/*Filter styles*/
.saturate { filter: saturate(3); }
.grayscale { filter: grayscale(100%); }
.contrast { ...
TortoiseHg Apply a Patch
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edited Jan 30 '15 at 1:58
congusbongus
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What is the difference between Nexus and Maven?
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3 Answers
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