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Filter dataframe rows if value in column is in a set list of values [duplicate]
...e a list of exact matches, but if you have a list of partial matches or substrings to look for, you can filter using the str.contains method and regular expressions.
For example, if we want to return a DataFrame where all of the stock IDs which begin with '600' and then are followed by any three di...
Iterate over a list of files with spaces
...hat you can use $'\0' to create NULs - you can't: a \0 in an ANSI C-quoted string effectively terminates the string, so that -d $'\0' is effectively the same as -d ''.
– mklement0
Apr 2 '16 at 17:36
...
URLEncoder not able to translate space character
...om the javadocs:
This class contains static methods for
converting a String to the
application/x-www-form-urlencoded MIME
format.
and from the HTML Specification:
application/x-www-form-urlencoded
Forms submitted with this content type
must be encoded as follows:
Con...
How to align 3 divs (left/center/right) inside another div?
... edited Jan 11 '13 at 0:52
Extra Savoir-Faire
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answered Jan 11 '13 at 0:35
...
Android: how to handle button click
... obviously).
If you use it in practice and in a business application, pay extra attention here, because when you use source obfuscater like ProGuard, you'll need to mark these methods in your activity as to not be obfuscated.
For archiving some kind of compile-time-security with this approach, hav...
Duplicate headers received from server
...e fine. My function to make a valid filename is below.
public static string MakeValidFileName(string name)
{
string invalidChars = Regex.Escape(new string(System.IO.Path.GetInvalidFileNameChars()));
string invalidReStr = string.Format(@"[{0}]+", invalidChars);
strin...
One-liner to take some properties from object in ES 6
...; there is no slimmer general solution (torazaburo's solution removes from extra verbage, but the essential problem -- that all property names have to be written twice -- means it doesn't scale any better than your solution). My solution at least scales well...right the pick function once, and you ...
How to get the build/version number of your Android application?
...nfo = context.getPackageManager().getPackageInfo(getPackageName(), 0);
String version = pInfo.versionName;
} catch (PackageManager.NameNotFoundException e) {
e.printStackTrace();
}
And you can get the version code by using this
int verCode = pInfo.versionCode;
...
The performance impact of using instanceof in Java
...e how instanceOf performance is comparing to a simple s.equals() call to a string object with only one letter.
in a 10.000.000 loop the instanceOf gave me 63-96ms, and the string equals gave me 106-230ms
I used java jvm 6.
So in my simple test is faster to do a instanceOf instead of a one charact...
read.csv warning 'EOF within quoted string' prevents complete reading of file
...ns.CSV", quote = "",
row.names = NULL,
stringsAsFactors = FALSE)
str(cit)
## 'data.frame': 112543 obs. of 13 variables:
## $ row.names : chr "10.2307/675394" "10.2307/30007362" "10.2307/4254931" "10.2307/20537934" ...
## $ id : chr "10.2307/6...