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Extracting numbers from vectors of strings
...ust remove _years_old
as.numeric(gsub(" years old", "", years))
or
# split by space, get the element in first index
as.numeric(sapply(strsplit(years, " "), "[[", 1))
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How to determine the longest increasing subsequence using dynamic programming?
...so exists a O(N log N) solution, which I will describe also. Look here for it at the section Efficient algorithms.
I will assume the indices of the array are from 0 to N - 1. So let's define DP[i] to be the length of the LIS (Longest increasing subsequence) which is ending at element with index i. ...
How to use string.replace() in python 3.x
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edited May 25 at 16:17
Boris
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How to index characters in a Golang string?
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Interpreted string literals are character sequences between double quotes "" using the (possibly multi-byte) UTF-8 encoding of individual characters. In UTF-8, ASCII characters are single-byte corresponding to the first 128 Unicode characters. S...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...ementation which is coming in the imminent 2.8 release. Those familiar with the library from 2.7 will notice that the library, from a usage perspective, has changed little. For example...
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How to loop through an associative array and get the key? [duplicate]
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edited Sep 4 '17 at 7:07
H. Bahadori
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answered Dec 23 '09 at 9:...
Cannot drop database because it is currently in use
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Someone connected to the database. Try to switch to another database and then, to drop it:
Try
SP_WHO to see who connected
and KILL if needed
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C# Linq Group By on multiple columns [duplicate]
...INQ to create a List from the List, grouped by the School, Friend and FavoriteColor properties. Is this possible with LINQ?
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Installing pip packages to $HOME folder
Is it possible? When installing pip , install the python packages inside my $HOME folder. (for example, I want to install mercurial , using pip , but inside $HOME instead of /usr/local )
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How to disable JavaScript in Chrome Developer Tools?
I am trying to debug the features of a website when users disable their JavaScript. I was wondering how do you disable JavaScript for a page from the Google Chrome DevTools?
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