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What characters are allowed in an email address?
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The format of e-mail address is: local-part@domain-part (max. 64@255 characters, no more 256 in total).
The local-part and domain-part could have different set of permitted characters, but that's not all, as there are more rules to it.
In general, the local part can have these ASCII c...
Heap vs Binary Search Tree (BST)
...e we insert top bottom?
Benchmarked with this Buildroot setup on an aarch64 HPI CPU.
BST cannot be efficiently implemented on an array
Heap operations only need to bubble up or down a single tree branch, so O(log(n)) worst case swaps, O(1) average.
Keeping a BST balanced requires tree rotations...
Performance optimization strategies of last resort [closed]
...eal Even on modern x86 hardware, imul can stall the pipeline; see "Intel® 64 and IA-32 Architectures Optimization Reference Manual" §13.3.2.3: "Integer multiply instruction takes several cycles to execute. They are pipelined such that an integer multiply instruction and another long-latency instru...
Is async HttpClient from .Net 4.5 a bad choice for intensive load applications?
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64
Besides the tests mentioned in the question, I recently created some new ones involving much fe...
What is a CSRF token ? What is its importance and how does it work?
...www.mybank.com/transfer?to=123456;amount=10000;token=31415926535897932384626433832795028841971.
That token is a huge, impossible-to-guess random number that mybank.com will include on their own web page when they serve it to you. It is different each time they serve any page to anybody.
The attacke...
Node.js vs .Net performance
...:
Dell Latitude E6510, Core i5 (dual core), 8 GB RAM, Windows 7 Enterprise 64 bit OS
node server
runs at http://localhost:9090/
/// <reference path="node-vsdoc.js" />
var http = require("http");
http.createServer(function (request, response) {
response.writeHead(200, { "Content-Type": "text/...
Why is “while ( !feof (file) )” always wrong?
...
64
No it's not always wrong. If your loop condition is "while we haven't tried to read past end of...
What is memory fragmentation?
...ication that had problems with memory fragmentation on HP-UX 11.23/11.31 ia64.
It looked like this. There was a process that made memory allocations and deallocations and ran for days. And even though there were no memory leaks memory consumption of the process kept increasing.
About my experienc...
Using @property versus getters and setters
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gsamaras
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answered Jul 7 '11 at 23:06
kindallkind...
Java naming convention for static final variables [duplicate]
...n MyObject:
public class MyObject {
private final long id; //It has a 64bit identifier (+8 bytes)
private final int value; //It has a 32bit integer value (+4 bytes)
private final boolean special; //Is it special? (+1 byte)
public static final int SIZE = 13; //8 + 4 + 1 = 13 bytes
}...