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How to implement an abstract class in ruby?
... Very important point. So often we tend to get blindsided by stuff that we read or hear, instead of thinking "what is the pragmatic approach in this case". It's seldom completely black or white.
– Per Lundberg
Aug 14 '17 at 8:15
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How to see the changes between two commits without commits in-between?
...ommits - in other words, diffing the output from two diffs. This involves reading and comparing two input streams. diff (GNU, or Unix, diff) can do that, while git diff cannot. Some may wonder why one would want to do that. I am in the middle of doing that right now, cleaning up a merge that went...
How is an overloaded method chosen when a parameter is the literal null value?
...
I never read that thing. But I did do some Java this summer and you can overload a method taking an Object with a method taking a Void object.
– xavierm02
Oct 23 '12 at 17:12
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Run batch file as a Windows service
...ervice had run the .bat successfully. Haven't dug into this yet but this thread experienced the same thing and solved it using nssm to install the service.
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Password masking console application
...e:
var pass = string.Empty;
ConsoleKey key;
do
{
var keyInfo = Console.ReadKey(intercept: true);
key = keyInfo.Key;
if (key == ConsoleKey.Backspace && pass.Length > 0)
{
Console.Write("\b \b");
pass = pass[0..^1];
}
else if (!char.IsControl(keyInfo...
Preview an image before it is uploaded
...
Please take a look at the sample code below:
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function(e) {
$('#blah').attr('src', e.target.result);
}
reader.readAsData...
What is the proper way to display the full InnerException?
...o it. Obviously, a full stack trace is usually a messy overkill, but only reading the inner exception is the other extreme. user3016982's answer is far better. You get every exception message in the stack without the nasty trace.
– JamesHoux
Aug 3 '18 at 14:...
jQuery UI Tabs - How to Get Currently Selected Tab Index
...-tabs-selected has been replaced with ui-tabs-active. !!!
I know this thread is old, but something I didn't see mentioned was how to get the "selected tab" (Currently dropped down panel) from somewhere other than the "tab events".
I do have a simply way ...
var curTab = $('.ui-tabs-panel:not(.ui...
Passing arrays as url parameter
...ize function.
It serializes any variable for storage or transfer. You can read about it in the php manual - serialize
The variable can be restored by using unserialize
So in the passing to the URL you use:
$url = urlencode(serialize($array))
and to restore the variable you use
$var = unseriali...
Useful GCC flags for C
...you can debug it and step through the source (unless you're proficient and reading assembly and like the stepi command) of a program whilst it's executing.
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