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Logger slf4j advantages of formatting with {} instead of string concatenation
... performance. It's potentially significant if your have dense logging statements.
(Prior to SLF4J 1.7) But only two parameters are possible
Because the vast majority of logging statements have 2 or fewer parameters, so SLF4J API up to version 1.6 covers (only) the majority of use cases. The A...
What is the difference between a pseudo-class and a pseudo-element in CSS?
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The CSS 3 selector recommendation is pretty clear about both, but I'll try to show the differences anyway.
Pseudo-classes
Official description
The pseudo-class concept is introduced to permit selection based on information that lies outside of...
Finding three elements in an array whose sum is closest to a given number
...rce search to find the three integers?
Yep; we can solve this in O(n2) time! First, consider that your problem P can be phrased equivalently in a slightly different way that eliminates the need for a "target value":
original problem P: Given an array A of n integers and a target value S, does ...
When should I use git pull --rebase?
I know of some people who use git pull --rebase by default and others who insist never to use it. I believe I understand the difference between merging and rebasing, but I'm trying to put this in the context of git pull . Is it just about not wanting to see lots of merge commit messages, or are...
What is the AppDelegate for and how do I know when to use it?
...ch implied by Andrew's use of the term "heart of your application". What I mean by this is that I think you should avoid lumping too many things in a central location -- good program design normally involves separating functionality by "area of concern".
A delegate object is an object that gets not...
Set active tab style with AngularJS
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When should I use Lazy?
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You typically use it when you want to instantiate something the first time its actually used. This delays the cost of creating it till if/when it's needed instead of always incurring the cost.
Usually this is preferable when the object may or may not be used and the cost of ...
Difference between single and double square brackets in Bash
I'm reading bash examples about if but some examples are written with single square brackets:
6 Answers
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A CORS POST request works from plain JavaScript, but why not with jQuery?
...t if you want to add custom headers or allow the use of credentials (username, password, or cookies, etc), read on.
I think I found the answer! (4 hours and a lot of cursing later)
//This does not work!!
Access-Control-Allow-Headers: *
You need to manually specify all the headers you will acce...
Search All Fields In All Tables For A Specific Value (Oracle)
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Quote:
I've tried using this statement below
to find an appropriate column based on
what I think it should be named but it
returned no results.*
SELECT * from dba_objects WHERE
object_name like '%DTN%'
A column isn't an object. If you mean that you...