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When is an interface with a default method initialized?
...ough to trigger the initialization. The default method doesn't have to be called or overridden or even mentioned, nor does the presence of an abstract method trigger initialization.
My speculation is that the HotSpot implementation wanted to avoid adding class/interface initialization checking into...
How to detect when cancel is clicked on file input?
...entListener("focus",fn,{once: true}). However I couldn't get it to fire at all using document.body.addEventListener.. I don't know why. Instead I got the same result with window.addEventListener.
– WoodenKitty
Aug 13 '16 at 2:21
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Understanding prototypal inheritance in JavaScript
...ctor or in the prototype. Using the prototype is more efficient because usually you need a function only once per type.
The new call in javascript automatically sets the constructor in the prototype. If you are overwriting the prototype so you have to set the constructor manually.
Inheritance in j...
Common programming mistakes for Clojure developers to avoid [closed]
...ix which used leading zeros to maintain proper rows and columns. Mathematically this is correct, since leading zero obviously don't alter the underlying value. Attempts to define a var with this matrix, however, would fail mysteriously with:
java.lang.NumberFormatException: Invalid number: 08
whi...
Setting mime type for excel document
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edited Feb 22 at 1:46
Callum Watkins
2,22222 gold badges2323 silver badges4040 bronze badges
answered Dec 26 '09 at 19:44
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How to get object size in memory? [duplicate]
...
Lists in C# are preallocated to whatever sizes the framework designers decided to go with, and then increased when needed. By default it's probably something like 10 elements. So you won't notice any size difference until you add enough element...
Get timezone from DateTime
...mezone information. It may know if it's UTC or local, but not what local really means.
DateTimeOffset is somewhat better - that's basically a UTC time and an offset. However, that's still not really enough to determine the timezone, as many different timezones can have the same offset at any one po...
CSS selector for first element with class
...lass. One workaround that Lea Verou and I came up with for this (albeit totally independently) is to first apply your desired styles to all your elements with that class:
/*
* Select all .red children of .home, including the first one,
* and give them a border.
*/
.home > .red {
border: ...
How to enable MySQL Query Log?
...able, disable and to see the logs on live servers without restarting.
Log all queries in mysql
Here is a summary:
If you don't want or cannot restart the MySQL server you can proceed like this on your running server:
Create your log tables (see answer)
Enable Query logging on the database
(No...
How to convert hex to rgb using Java?
... must be * 255 / 16. I tested this with "000", "aaa", and "fff", and they all work properly now.
– Andrew
Apr 14 '16 at 16:04
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