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  Difference between ConcurrentHashMap and Hashtable

Both ConcurrentHashMap and Hashtable are Collection classes for storing key value pairs and they both provide fast element search with a supplied key. They have much in common. However, we will not discuss the similarities between them here, instead we will focus on the differences between them. ConcurrentHashMap and Hashtable are both thread safe. But the mechanism for thread safe is different between them. Hashtable is synchronized, it utilizes the synchronization mechanism; while ConcurrentHa...

   ConcurrentHashMap,Hashtable     2013-11-18 08:06:54

  List of Web Safe Fonts

Here is the list of websafe fonts that I use in my own personal web development. Websafe (or "web safe", "safe for the web") fonts are supposedly fonts that are common among all versions of Windows, Mac, Linux, etc. Fonts that you expect everyone viewing your webpage to have. Please contact me if you know of any other web-safe fonts that should be added to this list. These font names are in typical font-family CSS format, in other words (first choice font), (second choice fon...

   Web,Font,Safe font,Font list,CSS,Font fa     2011-10-01 04:48:03

  Huawei is open to acquire Nokia

Last night Huawei unveiled a new flagship smartphone Ascend P6 in London. It may be the thinnest smartphone in the world and its potential competitor is Samsung Galaxy S4. Before the press event, an article from FT said that Huawei was open to buy Nokia. "We are considering these sorts of acquisitions,maybe the combination has some synerges but depends on the willingness of Nokia. We are open-minded." remarked by Huawei's Richard Yu. After this news, Nokia's share price surges 11% to $4.10 per ...

   Huawei,Nokia     2013-06-19 00:43:38

  A trick of building multithreaded application on Solaris

Firstly, Let’s see a simple multithreaded application: #include <stdio.h> #include <pthread.h> #include <errno.h> void *thread1_func(void *p_arg) { errno = 0; sleep(3); errno = 1; printf("%s exit, errno is %d\n", (char*)p_arg, errno); } void *thread2_func(void *p_arg) { errno = 0; sleep(5); printf("%s exit, errno is %d\n", (char*)p_arg, errno); } int main(void) { pthread_t t1, t2; ...

   C, Solaris     2014-10-14 02:59:40

  Public Vs. Private Cryptocurrency Keys

Before investing in any form of cryptocurrency, you must become familiar with the terminology used in the industry. This will prevent mistakes that could jeopardize your entire investment, and no one should be investing in any type of security or asset that they don't fully understand first. Crypto Wallets Before we even delve into what public and private keys are, we first need to discuss what the keys are for. Your Bitcoin or crypto wallet is basically the account that you store your cryptocur...

   SECURITY,CRYPTOCURRENCY     2022-03-06 08:17:30

  <=> operator in MySQL

Have you ever seen "<=>" in a SQL query while using MySQL? Does it mean less and equals to and greater than? Actually if you consider it as the union of <= and =>, great, you are close to it. This is one form of equal operator in MySQL, it has the similar meaning to the = operator with some subtle difference. According to MySQL documentation, <=> is NULL-safe equal. This operator performs an equality comparison like the = operator, but returns 1 rather than NULL if both operand...

   MySQL,NULL safe,<=>     2014-03-24 06:23:22

  How Java Application Developers Can Build Secure Internet Based Apps?

There are few compiled solution tested by experts to guide Java application development and maintenance team how they can start safe journey on Internet. Strong encryption, wise passwords, secure hardware are few of the tech tools that should be used by Java app development team to secure their Internet based apps.   The Internet is most amazing yet most risky platform where nobody knows either they are doing safe transaction on Internet or there is some dog watching out for data packets t...

   JAVA APPLICATION MAINTENANCE,JAVA APPLICATION DEVELOPMENT     2015-09-16 02:13:17

  How Can Your Data Be Stolen Online?

In 2019, according to Statista, nearly 165 million sensitive records were exposed in the US due to data breaches. Unfortunately, data theft is not going anywhere. Hackers are using increasingly sophisticated methods to steal information, but thankfully there are measures you can take to ensure your data stays safe. Here are some of the most common ways people get their data stolen online and how you can take precautions against the methods cybercriminals use. Human Error Hacking is one of the m...

   DATA SECURITY,PROTECTION KID     2021-01-27 19:46:05

  What is encryption? Its role in the modern age

“Messages and calls are end-to-end encrypted.” If you are a WhatsApp user, you must have read this statement at the top of chats you open. Now, what does it mean? The statement signifies that all the messages or voice notes shared between users are encrypted, and no one can read or listen in on them. As mostly all of us use messaging apps and emails, information security has become a major concern. Moreover, we don’t know how many digital footprints we leave on the web can be t...

   DATA SECURITY,VPN     2021-01-21 08:04:16

  Understand unsafe in GoLang

Before going to understand unsafe package in GoLang, the first thing needs to talk about is the pointer in GoLang. If you have a background of C language, you must know what pointer means and its usage. With pointer, you are free to operate any data at memory level which means you have great power, but this means that you have great responsibility as well. That's why it might be considered unsafe in lots of cases. Take a look at a simple example of doubling an integer. package main import "fmt"...

   GOLANG,UNSAFE,ZERO-COPY     2020-03-14 23:18:00

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