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How do you cast a List of supertypes to a List of subtypes?
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Is that actually casting the list? Because it reads more like series of operations to iterate over the whole list, casting each element, and then adding them to a newly instantiated list of the desired type. Put another way, couldn't you do exactly this with Java7- with ...
How can I override the OnBeforeUnload dialog and replace it with my own?
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Just FYI anyone reading this^ Chrome is deprecating synchronous AJAX calls in unbeforeunload
– morganwebdev
Apr 22 '19 at 21:09
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How to use enums as flags in C++?
...unique flags can be done using a bit shift. I, myself, find this easier to read.
enum Flags
{
A = 1 << 0, // binary 0001
B = 1 << 1, // binary 0010
C = 1 << 2, // binary 0100
D = 1 << 3, // binary 1000
};
It can hold values up to an int so that is, most of ...
Why does sudo change the PATH?
... Not only is it counterintuitive, it's incorrectly documented. Reading the man pages for sudo, and comparing the config against a Fedora box, I thought the path should be preserved. Indeed, "sudo -V" even says "Environment variables to preserve: PATH".
– Jason R. Co...
How do I get the resource id of an image if I know its name?
...fails to find the Resource ID. Be sure to recover properly in production.
Read this
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How to change field name in Django REST Framework
...urce=...) and other field types as well.
This would however work only for read only fields.
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What's wrong with using == to compare floats in Java?
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@MichaelPiefel it already says: "depending on the desired precision". Floats by their nature are kind of like physical values: you're only interested in some limited number of positions depending on the total inaccuracy, any differences beyond t...
Automating “enter” keypresses for bash script generating ssh keys
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Agree with Michel Marro except that it needs some more:
If the file already exists, it will still be interactive asking if it has to overwrite it.
Use the answer of this question.
yes y | ssh-keygen -q -t rsa -N '' >/dev/null
The redirection to null is necessary to silence the overwrite ...
Calculate text width with JavaScript
...ttributes that you are trying to measure, put your string in the DIV, then read the current width and height of the DIV. It will stretch to fit the contents and the size will be within a few pixels of the string rendered size.
var fontSize = 12;
var test = document.getElementById("Test");
tes...
git:// protocol blocked by company, how can I get around that?
...d it is our git port being blocked by a firewall, what can we do about it? Read on :)
Basic URL Rewriting
Git provides a way to rewrite URLs using git config. Simply issue the following command:
git config --global url."https://".insteadOf git://
Now, as if by magic, all git commands will perfo...