difference between fitbits

declare this function and you can use it. 1, what is the difference between a static global variable and a normal global variable? What is the difference between a static local variable and a normal local variable? What is the difference between a static function and a normal function? A: The description of a global variable (an external variable) is precede

1. Link labels belong to the XHTML category, while @ import is unique in css2.1. In addition to loading CSS, link labels can also do many other things, such as defining RSS and rel connection attributes. @ import can only load CSS. 2. the difference in the loading sequence is that when link loads CSS, It is a parallel method (no attempt is made to load CSS), while @ import loads the CSS only after the whole page is loaded. 3. Differences in compat

Differential Evolution (differential evolution,de) is an evolutionary algorithm based on group difference, which is proposed by Rainer Storn and Kenneth Price in 1996 to solve Chebyshev polynomial. The differential evolution algorithm is superior in the first IEEE Evolution calculation competition, and has been widely used in various fields. The basic idea of the difference algorithm is to reorganize the in

What is the difference between hide and fadeout display effects? Show and Fadein have the same effect? Many friends encounter this problem when they study jquery, and hide and fadeout can all have parameters: $ (selector). Hide (Speed,callback);$ (selector). fadeout (Speed,callback); First, we can see from the name of hide is hidden and fadeout is fading out, of course, the name can not see the specific differences, can only reflect that they are d

div and table differences in all aspects of performance are obvious, such as speed and load mode differences, in the Web application of the difference, and so on, many, the following detailed finishing a bit, like friends can refer to, hope can help you better understand the difference between DIV and table 　　1: Difference in speed and load mode The

First of all to introduce the difference between InputStreamReader and FileReader, the specific content as follows: InputStreamReader and BufferedReader. One of the most important classes is InputStreamReader, which is a bridge between bytes converted to characters. You can specify the encoding in the constructor, and the default encoding of the underlying operating system, such as GBK, will be used if unspecified. FileReader and InputStreamReader i

P-value is one of the most commonly used statistical indicators in the paper, but its misuse and interpretation are very common. Therefore, it is necessary to explain the significance of P-value, usage and common errors. P-value refers to the probability that the difference between the two comparisons is caused by chance. The smaller the P-value, the more reason to think that there is a difference between t

Cachevsbufferbothcacheandbufferaretemporarystorageareas buttheydifferinmanyways.Thebufferismainly Foundinramandactsasanareawherethecpucan storedatatemporarily,forexample,datameantforother Outputdevicesmainlywhenthecomputerandtheotherdevices havedifferentspeeds.Thiswaythecomputercanperform othertasks.cache,ontheotherhand,isahigh-speed storageareathatcanbepartofthemainmemoryor Someotherseparatestoragearealikeaharddisk.thesetwo methodsofcachingarereferredtoasmemorycachinganddiskcaching respectively

In CSS stylesheets, we often see the length units such as PT, Px,em,ex, in, and so on. What do they mean, what's the difference? I wrote another HTML example to test cm. In a CSS stylesheet, the length units are divided into two types: Relative length units, such as PX, EM, etc. Absolute length units, such as PT,MM, etc. Also talk about the difference between PX and PT Often see someone take px and PT compa

var olddate = ' 2017/02/07 00:00:00 '; setinterval (function () { var activedate = new Date (); var diffdate = Activedate.gettime ()-New Date (olddate). GetTime (); ----------------------- var days = Math.floor (diffdate/(24*3600*1000)); var leave1 = diffdate% (24*3600*1000); var hours = Math.floor (leave1/(3600*1000)); var leave2 = leave1% (3600*1000); var minutes = Math.floor

' OK 'Ok# [2 -bash:2: No such file or directory# [2 \# [2-GT 1-a 3-lt 4] echo ' OK 'Ok# [2-GT 1 3-lt 4] echo ' OK '-bash: [: Missing '] 'Note: In the [] expression, the common, Do not directly support 6.3 [[]] expressions# [1-eq 1] echo ' OK 'Ok# [[2 Ok#[[2 Ok[[2 -bash:syntax Error in conditional expression-bash:syntax error near '-a 'Note: the [[]] operator is only an extension of the [] operator. The ability to support the Gorgeous split Line***********************************************

the user.That is, out is used for output, and err is used for everything that you think is logically wrong, something that needs attention.System.out has caching capabilities both in the JVM and in the operating system,Is that your output is not necessarily real-time output, and sometimes accumulated to a certain amount will be outputSystem.err will be output in real time (default setting, can be changed)This is why the Err print position is not fixedIf log4j logging is used and the error level

The difference between computer 32-bit and 64-bit is detailed: Around the current issues that you are more concerned about, here will be summed up with you, about the 32-bit operating system and 64-bit operating system differences. Computer operating system 32-bit and 64-bit 32-bit and 64-bit operating systems are the ability of the CPU to process data at a time of 32 digits or 64 bits, where the processor operand is involved. Simple to say 32-bi

What is the difference between the href and src in this article? The difference between the href and src in HTML is introduced, there is a certain reference value, the need for friends can refer to, I hope to help you. Href: HREF is an abbreviation for hypertext reference, which represents a hypertext reference. Used to establish a link between the current element and the document. Commonly used are: link,

Summary of several methods for obtaining the time difference and calculating the time difference. Reprinted from: http://blog.csdn.net/coder_xia/article/details/6566708 I. Standard C and C ++ are available 1. Use time_t to obtain the timeTime(Time_t * timer), calculate the time difference using double difftime (time_t timer1, time_t timer0 ). Accurate to seconds.

[Code Note] iOS-computing time difference, note ios-Time Difference I. Code. -(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // time format: 18:34:31 NSLog (@ "% ld", [self getTimeInterval: @ "00:00:00"]);} // calculate the time difference-(NSInteger) getTimeInterval :( NSString *) sendDateString

Difference between Struct and Class: difference between StructClass The struct in C ++ expands the struct in C. It is no longer just a data structure that contains different data types. It has obtained too many functions.Can struct contain member functions? Yes!Can struct be inherited? Yes !!Can struct realize polymorphism? Yes !!! Since all these functions can be implemented, what is the

(1) The function of the Add Web Reference (Add Web Service Reference) provided in VS2005 is mainly to add Web services references.(2) VS2008 retains the Add Web Reference (Add Web Service Reference) also for version forward compatibility. Many projects are currently based on the. NET Framework 2.0.(3) VS2008 support for the WCF Service Library on the. NET Framework version 3.0 or 3.5 after the upgrade. Added the Add service Reference (Add Services Reference) feature. Framework3.0 or 3.5 is avail

Reprint Source: http://blog.sina.com.cn/s/blog_48f587a80100k630.htmlThe struct in C + + has been augmented by the struct in a, which is no longer just a data structure that contains a different datatype, and has acquired too much functionality.Can a struct contain member functions? Yes!Can a struct inherit? Yes!!Can a struct achieve polymorphism? Yes!!! Since all this can be achieved, what difference does it make with class?One of the most essential d

The method of calculating the time difference in PHP and MySQL is detailed, MySQL time difference Calculating the time difference in PHP is sometimes a hassle! But as long as you've mastered the use of datetime functions, that's a simple thing to do. Recently in the study of their love scarf to calculate the number of days of love, which requires PHP based on th