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How to detect if multiple keys are pressed at once using JavaScript?
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Note: keyCode is now deprecated.
Multiple keystroke detection is easy if you understand the concept
The way I do it is like this:
var map = {}; // You could also use an array
onkeydown = onkeyup = function(e){
e = e || event; // to deal w...
How to resolve “local edit, incoming delete upon update” message
...nd commited first. As a good svn citizen you do an update before a commit. Now you have a conflict. Realising that deleting the file is the right thing to do you delete the file from your working copy. Instead of being content svn now complains that the local files are missing and that there is a co...
How can I format a decimal to always show 2 decimal places?
...ring formatting
Python 3.6 introduced literal string interpolation (also known as f-strings) so now you can write the above even more succinct as:
>>> f'{pi:.2f}'
'3.14'
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In Python, how do you convert a `datetime` object to seconds?
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Python now warns me: "TypeError: can't subtract offset-naive and offset-aware datetimes" What's the best solution to fix that?
– Aaron Ash
Apr 13 '13 at 0:47
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How to run only one task in ansible playbook?
... role/stuff/tasks/main.yml
- name: do stuff
when: stuff|default(false)
Now, this task will not fire by default, but only if I set the stuff=true
$ ansible-playbook -e '{"stuff":true}'
or in a playbook:
roles:
- {"role":"stuff", "stuff":true}
...
Understanding events and event handlers in C#
...say these methods have the same signature, or shape, as the delegate.
So knowing how to create a reference to a method, let's think about the purpose of events: we want to cause some code to be executed when something happens elsewhere in the system - or "handle the event". To do this, we create sp...
What does character set and collation mean exactly?
...ation
of all four letters and their
encodings is a character set.
Now, suppose that we want to compare
two string values, 'A' and 'B'. The
simplest way to do this is to look at
the encodings: 0 for 'A' and 1 for
'B'. Because 0 is less than 1, we say
'A' is less than 'B'. Now, what...
How to check whether mod_rewrite is enable on server?
...our browser.
Search for 'mod_rewrite' again. You should be able to find it now.
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Using async-await on .net 4
... http://blogs.msdn.com/b/bclteam/archive/2013/04/17/microsoft-bcl-async-is-now-stable.aspx.
You can read about the previous version here: http://blogs.msdn.com/b/lucian/archive/2012/04/24/async-targeting-pack.aspx.
As this pack is officially supported, I now believe the best option for targeting X...
Constant pointer vs Pointer to constant [duplicate]
I want to know the difference between
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