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Moving decimal places over in a double
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190
If you use double or float, you should use rounding or expect to see some rounding errors. If yo...
How to slice an array in Bash
...
answered Aug 26 '09 at 17:10
Paused until further notice.Paused until further notice.
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...
Reduce, fold or scan (Left/Right)?
...first* operator arg `res`
// op: -4 - 4 = -8
// res: Int = -8
xs.foldLeft(0)(minus)
// op: 0 - 1 = -1
// op: -1 - 2 = -3
// op: -3 - 3 = -6
// op: -6 - 4 = -10
// res: Int = -10
xs.scanLeft(0)(minus)
// op: 0 - 1 = -1
// op: -1 - 2 = -3
// op: -3 - 3 = -6
// op: -6 - 4 = -10
// res: List[Int] = Li...
Remove rows with all or some NAs (missing values) in data.frame
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1080
Also check complete.cases :
> final[complete.cases(final), ]
gene hsap mmul m...
Remove last item from array
... |
edited Aug 3 at 10:48
CroMagnon
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answere...
How to parse a CSV file using PHP [duplicate]
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201
Just use the function for parsing a CSV file
http://php.net/manual/en/function.fgetcsv.php
$r...
Remove empty elements from an array in Javascript
...xample, if you want to remove null or undefined values:
var array = [0, 1, null, 2, "", 3, undefined, 3,,,,,, 4,, 4,, 5,, 6,,,,];
var filtered = array.filter(function (el) {
return el != null;
});
console.log(filtered);
It will depend on what you consider to be "empty" for exa...
Define a lambda expression that raises an Exception
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170
There is more than one way to skin a Python:
y = lambda: (_ for _ in ()).throw(Exception('fooba...
Semi-transparent color layer over background-image?
... position: relative;
}
.layer {
background-color: rgba(248, 247, 216, 0.7);
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
}
HTML for this:
<div class="background">
<div class="layer">
</div>
</div>
Of course you need to ...
Pandas - How to flatten a hierarchical index in columns
...et the columns to the top level:
df.columns = df.columns.get_level_values(0)
Note: if the to level has a name you can also access it by this, rather than 0.
.
If you want to combine/join your MultiIndex into one Index (assuming you have just string entries in your columns) you could:
df.column...