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remove None value from a list without removing the 0 value
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10 Answers
10
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Replace all 0 values to NA
I have a dataframe with some numeric columns. Some row has a 0 value which should be considered as null in statistical analysis. What is the fastest way to replace all the 0 value to NULL in R?
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Email Address Validation in Android on EditText [duplicate]
...target).
– rciovati
Apr 13 '13 at 9:02
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In Python, how do I convert all of the items in a list to floats?
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470
[float(i) for i in lst]
to be precise, it creates a new list with float values. Unlike the map...
Javascript calculate the day of the year (1 - 366)
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var now = new Date();
var start = 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 ...
What's the fastest way to loop through an array in JavaScript?
...yntactically obvious).
A standard for-loop with length caching
var i = 0, len = myArray.length;
while (i < len) {
// your code
i++
}
I would say, this is definitely a case where I applaud JavaScript engine developers. A runtime should be optimized for clarity, not cle...
How do you push a Git tag to a branch using a refspec?
I want to force push, for example, my tag 1.0.0 to my remote master branch.
4 Answers
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Modify SVG fill color when being served as Background-Image
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edited Dec 21 '18 at 0:15
David Neto
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answered ...
How to find the kth smallest element in the union of two sorted arrays?
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50
You've got it, just keep going! And be careful with the indexes...
To simplify a bit I'll assum...
Apply a function to every row of a matrix or a data frame
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[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to apply().
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