Laravel: saving a serialized copy of my model for history

PHP
I need to manage record history for a specific model(s). So following the example here (https://laravel.com/docs/5.2/eloquent#events) I did something ...
8 months ago

Drawbacks of static methods in PHP

PHP
In a theoretical database access class, I found that there are quite a few helper functions that I use in the class, which have nothing to do the clas...
8 months ago

accessing static method within class variable

PHP
I have been looking around attempting to find out how to access a stripe static method within my own class. Essentially extending the stripe library. ...
8 months ago

Validate multiple conditions in Yii2

PHP
I have this kind of validation on Leave Employee: Validate if startdate less than applydate (done). Cannot apply leave if maximumquota less than 0 (...
8 months ago

Broadcasting in Python with permutations

Python
I understand that transpose on an ndarray is intended to be the equivalent of matlab's permute function however I have a specific usecase that doesn't...
8 months ago

Image transformation in OpenCV

Python
This question is related to this question: How to remove convexity defects in sudoku square I was trying to implement nikie's answer in Mathematica ...
8 months ago

OperationTimedOut: errors={}, last_host=127.0.0.1

Python
I am using a single node Cassandra and I intend to run some queries in order to check the response time. In some queries, after 10s of execution occur...
8 months ago

Developing Python applications in Qt Creator

Python
I've developed a few Qt projects in C++ using Qt Creator in the past, but now I want to experiment with the Python implementation of Qt. I discovered ...
8 months ago

Separate comma-separated values within single field of Pandas Series using regex

Python
I have a csv file from a database I've converted into a Pandas DataFrame that I'm trying to clean up. One of the issues is that multiple values have b...
8 months ago

selecting element in python selenium

Python
I'm trying to log onto a webpage with python selenium. I've found an element and it is enabled, but when I try to send_keys() to it I get an error. ...
8 months ago

Python - combine regex patterns

Python
I have a large text and the aim is to select all 10-character strings for which the first character is a letter and the last character is a digit. I...
8 months ago

python logging - message not showing up in child

Python
I am having some difficulties using python's logging. I have two files, main.py and mymodule.py. Generally main.py is run, and it will import mymodu...
8 months ago

Using bits directly in python

Python
I want to manipulate the binary number directly in python. For example I have decimal number 18. I was able to convert number into binary using seed ...
8 months ago

How do I concat corresponding values of two Pandas series?

Python
I have a PD DF with three columns: lon, lat, and count: lon lat count 123 456 3 789 012 4 345 678 5 And I'd like to concat lon ...
8 months ago

aggregate bins in large GRanges efficiently

R
I have a SummarizedExperiment (but we can consider it a GRanges). What I want is to reduce the number of intervals, keeping only one row for every ide...
8 months ago

adding commas into number for output

R
i'm outputting a dataframe to html via xtable now (tip to Shane, little nicer than r2html). I want to add commas to numbers in a couple columns of the...
8 months ago

How to find whole distance between two points in a curved line in R?

R
I have a similar line graph plotted using R plot function (plot(df)) I want to get distance of the whole line between two points in the graph (e.g....
8 months ago

R - Calculate sum within date range using zoo

R
Suppose I have a data frame with ten years of daily temperature data (in degree C) like this: mydf <- data.frame(Date = seq(as.Date("2001/1/1"), a...
8 months ago

Combine separate Year and Month columns into single Date Column

R
I have a data frame (df) like this: code year month 1 YYOOGG 2011 8 2 YYOOGG 2011 1 3 YYOOGG 2011 4 4 YYOOGG 2011 3...
8 months ago

Sample Rows with SQLDF

R
sqldf has a limit option to get 'X' rows. Can we also do a 'x%' sample using sqldf? e.g. > sqldf("select * from iris limit 3") Loading required...
8 months ago