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The meaning of program size:code=x ro-data=x rw-data=x zi-data=x Code: The size of the flash the program occupies, stored in flash. Ro-data (read-only data): Read-only-data, program-defined constants, such as const, stored in Flash. Rw-data (Readable and writable data with initial value requirements):Read-write-data, a

There is a function: x The C language has a function: x to be output

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There are three main ways in which a variable is always judged to be none:The first is "if X is None";The second type is ' if not x: ';The third is ' if not ' (this is a clearer understanding of ' if not ' (x is None) ').If you think it makes no difference, then you should be careful, there is a hole in it. Let's take a look at the code: >>>

This article mainly introduces you on how to choose the jquery version, is 1.x? 2.x or 3.x? Before choosing to use jquery, we often consider what version of jquery should be chosen. Now what version of jquery and jquery IE8 compatible version and jquery What version of the stability of the issue, the following through this article to see the detailed introduction

Similar title: What version does jquery choose? What version of jquery do you use? jquery IE8 compatible version. What version of jquery is stable? There are currently three major versions of jquery: 1.x: Compatible with ie678, the most widely used, the official only bug maintenance, function no longer new. So for general projects, the 1.x version is available, and the final version: 1.12.4 (May 20,

Difference between Python2.x and Python3.x, python2.xpython3. x Python version 3.0 is often called Python 3000 or Py3k. Compared with earlier versions of Python, this is a major upgrade. In order not to bring too much burden into it, Python 3.0 does not consider backward compatibility during design. Many programs designed for earlier versions of Python cannot be

Content transfer fromhttp://blog.csdn.net/sasoritattoo/article/details/12451359There are three main ways to judge whether a variable is a none in the code:The first is the ' if X is None ';The second type is ' if not x: ';The third kind of ' if not X is None ' (this sentence understands more clearly ' if not ' (x is No

Difference between python3.x and 2.x, and between python3.x2. x 1. Performance Py3.0 runs pystone benchmark 30% slower than Py2.5. Guido believes that Py3.0 has a huge space for optimization, which can be used for string and integer operations.To achieve good optimization results.Py3.1 performance is 15% slower than Py2.5, and there is still much room for improve

Python code if not x: And if x is not None: And if not x is None: usage introduction, pythonnone There are usually three main methods to determine whether the variable is None in the Code:The first is 'if x is none ';The second type is 'If not x :';The third is 'If not

Dionysoslai 2015/2/28For the design of the event interception, Cocos2d-x from 2.x to 3.x has undergone a fundamental change, has always been to this, only the simple use of thinking about how to build their own game code, not the design of the pros and cons to explore. Just a while ago in a new game, about 2.x touch ev

Label: Ar data C r amp as Har Text D (X Y) + (x ^ y)> 1) equals to (x + y)/2 (X Y) + (x ^ y)> 1), divide each bit (Binary bit) in X and Y into three types, calculate the average value for each category and summarize the results.

Tags: 3.4 Part log code negative strong return COM logsMySQL Rounding function round (x) The ROUND (x) function returns the integer closest to parameter x, rounding the X value. Instance: The operand is rounded using the round (x) function. The SQL statements are as follows:

Several examples of code that is compatible with Python 2.x and Python 3.x, python2.xpython3. x Write compatible Python and 3.x code When we are in Python 2. x to Python 3. during the transition period of x, you may wonder if you

functions, and the variables and functions in the scopeOf the calling code. This explains why the getcellcount () function has access to the _ rows and _ columns variables that are defned in the outer function (table ): // Table classFunction table (rows, columns){// Save parameter values to local variablesVaR _ rows = rows;VaR _ columns = columns;// Return the number of table cellsThis. getcellcount = function (){Return _ rows * _ columns;};} The scope ofEval ()Execution context is identical t

Label: style blog color ar strong data SP Div C Method 1:We consider adding X and Y to bits in binary representation.Where the I-th DigitXI + yi = (XI Yi) (XI Yi) Xi ^ Yi indicates that carry is not considered. The value of the current BIT.Add all the data, that isX + y = sum {Xi * 2 ^ I} + sum {Yi * 2 ^ I} = sum {(XI + yi) * 2 ^ I}= Sum {(XI Yi) = Sum {(XI Yi) * 2) * 2 ^ I + (Xi ^ Yi) * 2 ^ I}= Sum {(XI Yi) * 2 ^ I} * 2 + sum {(Xi ^ Yi) * 2 ^ I

Cocos2d-x learning notes (2) Cocos2d-x overall framework, cocos2d-x learning notes Original article, reproduced please indicate the source: http://blog.csdn.net/sfh366958228/article/details/38680123 In the previous section we briefly analyzed the HelloWorld project, and we will look further at the overall framework of the Cocos2d-

Android 2.x uses the theme 4. x and Android 2.x4.x. Currently, most Android Developers use Android APP 2. x SDK version, to be compatible with 2. x's mobile phone is understandable, but the biggest headache is 2. the theme of Version x is too ugly. This is what Android just

/*1 Tell x + y to A, and x * y to B.A said to B, "I don't know these two numbers, but you don't know""I know now," said B"A said, "I know now"*/# Include # Include # Include # Include # Include Using namespace std; Class foo;Typedef vector Typedef vector Class foo{Public:Foo (int _ x, int _ y){X = _

In general, x+=y and x=x+y output is equivalent, so the two formulations can be common, but in some critical values to choose x+=y more appropriate, such as:Short n=3;n+=1;//compilation failed with n=n+1;//compilationIn the above example, the right side of the n=n+1 equals evaluates to the int type, while the left vari