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Set value for particular cell in pandas DataFrame using index
... faster than the options I've suggested below. However, it has been slated for deprecation.
Going forward, the recommended method is .iat/.at.
Why df.xs('C')['x']=10 does not work:
df.xs('C') by default, returns a new dataframe with a copy of the data, so
df.xs('C')['x']=10
modifies this ne...
Inspect hovered element in Chrome?
...n when I am hovered over the item, when I "inspect element", nothing shows for the tooltip in the html. I know I can set the Style to :hover , but I still can't see the html or css of the tooltip.
...
How to loop over files in directory and change path and add suffix to filename
...ta/data1.txt (with a leading slash)? Also, should the outer loop scan only for .txt files, or all files in /Data? Here's an answer, assuming /Data/data1.txt and .txt files only:
#!/bin/bash
for filename in /Data/*.txt; do
for ((i=0; i<=3; i++)); do
./MyProgram.exe "$filename" "Logs/$...
How to extract an assembly from the GAC?
...S. In case the
developer has deleted the original DLL
or don't have it for some reason,
there is a way to get the DLL file
from GAC. Follow the following steps
to copy DLL from GAC
Run regsvr32 /u C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\shfusion.dll
shfusion.dll is an...
How to get the Power of some Integer in Swift language?
...2³ = 8
I used two carets so you can still use the XOR operator.
Update for Swift 3
In Swift 3 the "magic number" precedence is replaced by precedencegroups:
precedencegroup PowerPrecedence { higherThan: MultiplicationPrecedence }
infix operator ^^ : PowerPrecedence
func ^^ (radix: Int, power: ...
The simplest way to resize an UIImage?
...ass 0.0 to use the current device's pixel scaling factor (and thus account for Retina resolution).
// Pass 1.0 to force exact pixel size.
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0.0);
[image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
UIImage *newImage = ...
Difference between matches() and find() in Java Regex
... ^ at the start and $ at the end of your pattern, meaning it will not look for a substring. Hence the output of this code:
public static void main(String[] args) throws ParseException {
Pattern p = Pattern.compile("\\d\\d\\d");
Matcher m = p.matcher("a123b");
System.out.println(m.find()...
Upgrade python packages from requirements.txt using pip command
...red this question here. Here's my solution:
Because there was no easy way for upgrading package by package, and updating the requirements.txt file, I wrote this pip-upgrader which also updates the versions in your requirements.txt file for the packages chosen (or all packages).
Installation
pip i...
npm install private github repositories by dependency in package.json
...
Do you have a reference link for this solution?
– Ian
Apr 9 '15 at 20:08
3
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Syntax for creating a two-dimensional array
...he following:
int[][] multi = new int[5][10];
... which is a short hand for something like this:
int[][] multi = new int[5][];
multi[0] = new int[10];
multi[1] = new int[10];
multi[2] = new int[10];
multi[3] = new int[10];
multi[4] = new int[10];
Note that every element will be initialized to ...