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Why should Java ThreadLocal variables be static
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Because if it were an instance level field, then it would actually be "Per Thread - Per Instance", not just a guaranteed "Per Thread." That isn't normally the semantic you're looking for.
Usually it's holding something like objects that are scoped to a User Conversation, Web Request...
How to change the cursor into a hand when a user hovers over a list item?
...move { cursor: move; }
.no-drop { cursor: no-drop; }
.not-allowed { cursor: not-allowed; }
.all-scroll { cursor: all-scroll; }
.col-resize { cursor: col-resize; }
.row-resize { cursor: row-resize; }
.n-resize { cursor: n-resize; }
.e-resize { cursor: e-resi...
Sending emails in Node.js? [closed]
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This really helps the docs are pretty self explanatory.
– NycCompSci
Nov 8 '10 at 4:08
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When should I use double instead of decimal?
...these errors are significant enough to warrant much thought however.
In all cases, if you want to compare two floating-point numbers that should in theory be equivalent (but were arrived at using different calculations), you need to allow a certain degree of tolerance (how much varies, but is typ...
ViewController respondsToSelector: message sent to deallocated instance (CRASH)
... hate putting out questions about my debugging and crashes. Because I usually handle them myself, but I just cannot get my way around this, even after viewing multiple questions already .
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Data access object (DAO) in Java
I was going through a document and I came across a term called DAO . I found out that it is a Data Access Object. Can someone please explain me what this actually is?
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How to link a Facebook app with an existing fan page
...ou will find "App Page". There you will be able to create a new page or if all went well, select your page from a list.
I found the info in the little question-mark next to "App page".
I hope this helps.
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What is the point of Lookup?
... via that key in an efficient manner (rather than just iterating over them all, which is what GroupBy lets you do).
For example, you could take a load of .NET types and build a lookup by namespace... then get to all the types in a particular namespace very easily:
using System;
using System.Collec...
How to count number of files in each directory?
I am able to list all the directories by
17 Answers
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How do short URLs services work?
... site that is redirected to will see the referrer (the site that you originally come from) as being the site the TinyUrl link is on (i.e., twitter.com, your own site, wherever the link is). This is just as important, so that site owners can see where people are coming from. This too, would not work ...