what is difference between megabytes and gigabytes

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What are the canvases and SVG in HTML5? What is the difference between them? Instance

This chapter introduces you to what are the canvas and SVG in HTML5? What is the difference between them? Have a certain reference value, the need for friends can refer to, I hope to help you. First, what is canvas? Canvas

C and C + + is how to dynamically allocate and release memory, what is the difference

freed function is the free function:The Free function prototype is:void free(void *ptr) Function: Frees the memory space requested by the above 3 functions. Parameter: ptr: Points to the first address of the memory space that needs to be freed. C + + languageIn C + +, memory is divided into 5 extents, namely heap, stack, free storage, global/static storage, and constant storage. Apply and release the alloc

What is the difference between class and struct? Do they affect performance ?. What are the classes (structures) in the net BCl, and why are they not structures (classes )? How do you select a class or structure for custom types?

The previous article is also the first question of Lao Zhao's interview questions. This article continues, hoping to find the key points of our study through these interview questions, instead of carrying these things, and hopes to systematically learn these points. net. What is the difference between class and struct?

What are CPK and PPK? What is the difference between them?

What are CPK and PPK? What is the difference between them?A: CPK is complex process capability index.The abbreviation used by modern enterprises to representProcess Capability. Strong process capability can produce products with high quality and reliability.PPK

What is the difference between a single quotation mark and a double quote for a string in PHP? Delimiter and double quote difference?

(1) What is the difference between single and double quotation marks?1, can be used to escape the range, the single quotation mark can only escape the single quotation mark \ ', double quotation marks except single quotation mark cannot escape, other \ "\n\r\t can.2, double quotation mark can parse PHP variable, single quotation mark cannot. That

What is the use of the Serialize function? What's the difference with JSON?

What is the use of the serialize function? What's the difference with JSON?Official explanation:Serialize (PHP3 >= 3.0.5, PHP4) Serialize---produces a value that can be stored in the notation syntax: String serialize (mixed value) Description: Serialize () returns one containing the VA Lue represents the Byte-stream string, which can be stored anywhere. This can

What is the difference between object-oriented, service-oriented, component-oriented three programming patterns? What areas of development are applicable to each?

Http://blog.sina.com.cn/s/blog_6d2890600101cwih.htmlThree data are missing a word, namely: "Programming", "Architecture" and "development" (or "Software Engineering"). At the same time, it is not "facing" components but "based on" components. Object-oriented Programming (Object-oreinted programming) is a programming paradigm. Refers to the way in which class instance objects are used extensively when

What is the difference between cloud billing and local standard certification? What are their advantages?

The so-called "Cloud" concept is to put databases and Management terminals remotely, that is, the cloud. Advantages of the cloud? 1. There are usually multiple servers on the cloud for redundancy, so it will not cause business Faults due to the failure of one server. 2. data can be stored on a remote server for a long time without being lost due to damage to the local hard disk. 3. The data server on th

What is the difference between a single quotation mark and a double quote for a string in PHP? Delimiter and double quote difference?

(1) What is the difference between single and double quotation marks? 1, can be used to escape the range, the single quotation mark can only escape the single quotation mark \ ', double quotation marks except single quotation mark cannot escape, other \ "\n\r\t can. 2, double quotation mark can parse PHP variable, single quotation mark cannot. That

SIS system and DCS system use and configuration of the essential difference analysis, more profound know DCs in order to control, SIS in order to protect! What is the difference between SIS system and DCS system?

DCS--distribution control system decentralized controls, plant control level systems, conventional data acquisition, device controlThis system is completed.Sis--safty Instruments System Security instrumentation systems, interlock system, generally do the plant process equipment safety protection control, sometimes also includes the unit safety protection control.What is the

HTML5 is very fire, what is the difference between him and html4?

tags in HTML5. As the name implies, these two tags are used to play audio and video. 8. A new formHTML5 has made a lot of changes to 9. Delete This improvement is beyond my comprehension. I don't think the removal of these two tags is a great help to the code improvements. The official explanation is that CSS should be used instead of the two tags. But I still f

SSH project, what is the difference between using gethibernatetemplate and getsession? What are the pros and cons?

SSH project, what is the difference between using gethibernatetemplate and getsession? What are the pros and cons, thanks for the answer!Reward Points: 0-resolution Time: 2008-10-7 09:42SSH project, what is the

What <!--?--> <t> 's the difference between a list and a list? That is, the difference between the type parameter " <t> " and <!--?--> the unbounded wildcard character "" </t> </t>

Difference between type parameter " To discuss " First, declare a generic class or generic method. Second, use a generic class or generic method. The type parameter "The unbounded wildcard " In layman's parlance, "T" is what is declared when a class or method is defined

What are the cast operators of C ++? What is the difference and connection with the C-style type conversion (T) value?

Anyone who mentions static_cast, const_cast, reinterpret_cast, and dynamic_cast on the Internet will say that they have overcome the disadvantages of C-style type conversion and should use them.But what are the disadvantages of the C style? What are the advantages of C ++ cast?Before yesterday, I didn't even know what the cast was ). Yesterday, my colleagues ment

What is the difference between buildpath and includepath? What should I do?

What is the difference between buildpath and includepath? What is the difference between buildpath and includepath? ------ Solution -------------------- buildpath and includepath of projects such as zend of eclipse series are usel

What is the difference between buildpath and includepath? What should I do?

What is the difference between buildpath and includepath? What is the difference between buildpath and includepath ?, The buildpath and includepath of eclipse series zend projects are useless. They are mainly functions. new PHP sy

What exactly is the relationship between UTF8 and Unicode encoding? What's the difference? _ Basic Tutorial

. English Unicode code because the value is less than 0x80, as long as a byte of the UTF8 transmission, than sending Unicode two bytes faster. UTF8 is the "re-coding" method that is thought out for transmitting Unicode. UTF8 to Unicode using the program I gave above can be reversed. UTF8 is a transition solution for t

What exactly is the relationship between UTF8 and Unicode encoding? What's the difference? _ Basic Tutorial

because the value is less than 0x80, as long as a byte of UTF8 transmission, than send Unicode two bytes faster. UTF8 is the "re-coding" method that comes out of Unicode for transmission. UTF8 to Unicode with the program I gave above the inverse calculation can be. UTF8 is a transition solution for existing ASCII systems to the Unicode system. UTF8

What is the difference between how these two custom events are bound? What kind of good?

The first way to store custom events directly in __onfireevents var __onfireEvents = {};function _bind(eventName, callback, is_one, context) { if (typeof eventName !== string_str || typeof callback !== function_str) { throw new Error('args: '+string_str+', '+function_str+''); } if (! hasOwnKey(__onfireEvents, eventName)) { __onfireEvents[eventName] = {}; } __onfireEvents[eventName][++__cnt] = [callback, is_one, context]; return [eventName, __cnt];}function on(eve

What is the difference between struts2 and strut1? What are the advantages of struts2?

Action class:• Struts1 requires the action class to inherit an abstract base class. A common problem with struts1 is the use of abstract class programming rather than interfaces.• The struts 2 Action class can implement an action interface or other interfaces to make optional and customized services possible. Struts2 provides an actionsupport base class to implement common interfaces. The action interface is

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