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Managing relationships in Laravel, adhering to the repository pattern
... your "business problem".
A Course is a "entity", with attributes (title, id, etc) and even other entities (Assignments, which have their own attributes and possibly entities).
Your "Course" repository should be able to return a Course and the Courses' attributes/Assignments (including Assignment)...
How to use Git Revert
...te as if the commit that has been reverted never existed. For example, consider the following simple example:
$ cd /tmp/example
$ git init
Initialized empty Git repository in /tmp/example/.git/
$ echo "Initial text" > README.md
$ git add README.md
$ git commit -m "initial commit"
[master (root-co...
Remove duplicated rows
...moval, either from specific columns/variables (as in this question) or considering all columns/variables. dplyr is part of the tidyverse.
Data and package
library(dplyr)
dat <- data.frame(a = rep(c(1,2),4), b = rep(LETTERS[1:4],2))
Remove rows duplicated in a specific column (e.g., columna)
...
Why is subtracting these two times (in 1927) giving a strange result?
...in Shanghai.
See this page for details of 1927 in Shanghai. Basically at midnight at the end of 1927, the clocks went back 5 minutes and 52 seconds. So "1927-12-31 23:54:08" actually happened twice, and it looks like Java is parsing it as the later possible instant for that local date/time - hence ...
Need to list all triggers in SQL Server database with table name and table's schema
...
SELECT
sysobjects.name AS trigger_name
,USER_NAME(sysobjects.uid) AS trigger_owner
,s.name AS table_schema
,OBJECT_NAME(parent_obj) AS table_name
,OBJECTPROPERTY( id, 'ExecIsUpdateTrigger') AS isupdate
,OBJECTPROPERTY( id, 'ExecIsDeleteTrigger') AS isdelete
,OBJ...
What is the difference between “INNER JOIN” and “OUTER JOIN”?
...ally show any distinction between different types of join predicate or provide a framework for reasoning about how they will operate.
There is no substitute for understanding the logical processing and it is relatively straightforward to grasp anyway.
Imagine a cross join.
Evaluate the on clause ag...
WAMP shows error 'MSVCR100.dll' is missing when install
...an download it at:
https://www.microsoft.com/en-us/download/details.aspx?id=30679
There you can select the x86 or x64 version depending on your system
This article on the WampServer forums shows all the Microsoft Visual C++ runtime libraries you need to have installed on your system for each v...
Why do we need a fieldset tag?
...;Colour</legend>
<input type="radio" name="colour" value="red" id="colour_red">
<label for="colour_red">Red</label>
<input type="radio" name="colour" value="green" id="colour_green">
<label for="colour_green">Green</label>
<input type="radio"...
Rails server says port already used, how to kill that process?
...s what webrick normally uses), type this in your terminal to find out the PID of the process:
$ lsof -wni tcp:3000
Then, use the number in the PID column to kill the process:
$ kill -9 PID
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How do I clear this setInterval inside a function?
...igger(markers[timedCount], "click");
timedCount++;
}, 5000 );
};
var id = intervalTrigger();
Then to clear the interval:
window.clearInterval(id);
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