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Why are Objective-C delegates usually given the property assign instead of retain?
...lloc would never get called, causing both A and B to leak.
You shouldn't worry about A going away because it owns B and thus gets rid of it in dealloc.
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Cannot find module cv2 when using OpenCV
...st do run these commands inside Terminal/CMD:
conda update anaconda-navigator
conda update navigator-updater
Then the issue for the instruction below will be resolved
For windows if you have anaconda installed, you can simply do
pip install opencv-python
or
conda install -c https://conda.binst...
Does a C# app track how long its been running?
...rrent.StartTime is server's local time, not UTC.
– George
May 14 '14 at 19:33
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Storing a Map using JPA
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JPA 2.0 supports collections of primitives through the @ElementCollection annotation that you can use in conjunction with the support of java.util.Map collections.
Something like this should work:
@Entity
public class Example {
@Id...
Is it possible to do start iterating from an element other than the first using foreach?
I'm thinking about implementing IEnumerable for my custom collection (a tree) so I can use foreach to traverse my tree. However as far as I know foreach always starts from the first element of the collection. I would like to choose from which element foreach starts. Is it possible to somehow chang...
How to check if a table contains an element in Lua?
Is there a method for checking if a table contains a value ? I have my own (naive) function, but I was wondering if something "official" exists for that ? Or something more efficient...
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How can I get the current PowerShell executing file?
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I've tried to summarize the various answers here, updated for PowerShell 5:
If you're only using PowerShell 3 or higher, use $PSCommandPath
If want compatibility with older versions, insert the shim:
if ($PSCommandPath -eq $null) { function GetPSCommandPath() { return $MyInvocation...
Track a new remote branch created on GitHub
...branch tracking the remote master branch of a github project. Now, a collaborator of mine has created a new branch in the same project, and I want to do the following accordingly:
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How to make execution pause, sleep, wait for X seconds in R?
How do you pause an R script for a specified number of seconds or miliseconds? In many languages, there is a sleep function, but ?sleep references a data set. And ?pause and ?wait don't exist.
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Reading a List from properties file and load with spring annotation @Value
...vate List<String> myList;
Assuming your properties file is loaded correctly with the following:
my.list.of.strings=ABC,CDE,EFG
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