Developed with the old boy's education in Python [Article 3]: Python functions, old boy python
Set
Unordered, non-repeated, nested.Function
Create a function:
1. def Keyword: Create a function
2. Function Name
3 ,()
4. Function body
5. return valuesDefault return value of the return function in the mail function None common parameter default parameter
Note: To specify a default value for a parameter, the parameter must be placed at the end of
Old boy linux advanced architecture Baidu cloud disk download, old boy cloud Disk
I know little about Linux resources, because I hate to use command lines most (that is the shadow of my college age !). This resource has not been shared for a long time, because I have little knowledge about Linux and do not know how to describe it, but today, I want to share with my Linux friends who do not know much about
Follow the development of Python in old boy education [Article 7]: Object-oriented 2, old boy python
Field
Static Field application:
Memory saving:
Generally, you can access your own fields.
Rule: common fields can only be accessed by objects, and static fields can be accessed by classes (object access is allowed ).
Static fields have been created when the code is loaded.Common, static, and class meth
Linear correlation of the first section vector group
A Mathematical Concepts
Defines 1.1 n ordered numbers, the array of which is called an n-dimensional vector, which is called n components of the vector, and the number I is called the first component.
Definition 1. 2 to the directional measure group A:, for any set of real numbers, vectors
A linear combination
Vectors are vector types that can hold many types of data, such as several integers, so they are called containers. Vector is an important member of the C + + STL, and you need to include the header file when you use it:
Copy Code code as follows:
#include
Vector initialization: There are five ways to do this, examples are as follows:
(1)
Summary of several situations of vector vectors in c ++ (vector pointer and pointer vector)
1. Standard Library vector type
Vector is a set of objects of the same type. Each object has a corresponding integer index value. The standard library will be responsible for managing
In practice, the vector series in c ++ -- vector (unique_ptr () is assigned to vector (unique_ptr ())
Previously, we mentioned that the insert method can be used to copy a vector to the end of another vector.
As mentioned in previous blogs, if unique_ptr is placed inside the
In practice, the vector series in c ++ -- vector traversal (stl algorithm, vector iterator (do not judge not equal to end () in the loop), operator [])
There are many ways to traverse a vector container.
Index traversal:
for (i = 0; i
Iterator traversal:
for (vInt::const_iterator iter = v.begin(); iter != v.end();it
Previous blogs about vectors you can use the Insert method to copy a vector to the back of another vector.Previous blogs have also talked about the need to transfer ownership if the vector container is placed inside the unique_ptr.Come on, now. 818 HowvectorIf you have a regular vector, we can use insert like this://inserting into a
Vector series in practice c ++-sort the vector using the sort algorithm (sort the vector (string) and use stable sorting std: stable_sort ())
After writing a lot of vector operations, we encountered the Sorting Problem of the vector in our work. Here we will discuss it.
Use
In three-dimensional space, the product of two vectors (a vector product, an outer product, a product, a multiplication of multiples of two vectors: the inner product, the dot product) represents the torque of two vectors, and the mixed product axb of three vectors C, the area of the parallelepiped that is composed of three vector a,b,c. And the position of a,b,c in the mixed product is interchangeable (thi
In practice, the vector series in c ++ -- creating vector of local structure AND vector of structs initialization
I have never used it beforeVector
Now, write a short code:
#include
#include
int main() { struct st { int a; }; std::vector
v; v.resize(4); for (std::
I've never used it before.vector#include #include intMain () {structSt {intA };STD:: vectorV V.resize (4); for(STD:: vector:: Size_type i =0; I operator[] (i). A = i +1;//v[i].a = i+1;} for(inti =0; I STD::coutSTD:: Endl; }}Compile successfully with VS2015, run result:1234However, this is only allowed after c++11, the compiler does not allow you to write such a syntax, the vector container is not allowed to
C ++ copies the content in a vector to the end of another vector and ends with the vector.
When using the vector container, We need to copy the content of a vector to the end of another vector. How can this problem be achieved?
See C++primer Plus look bored, the first time do Leetcode practice, originally want to do two-dimensional vector, results always pass, check the reason, must use one-dimensional ...One-dimensional answers:Class Solution {PublicVector{int cout = Nums.size (); Get the size of the vectorvectorfor (int i = 0; i{for (int j = i + 1; j{if ((Nums[i] + nums[j]) = = target){Ret.push_back (i); Get the location of the target valueRet.push_back (j);}}}return ret;}
,axMOV Es,ax;; Set up to use 320x200 color graphic mode firstMain:mov ah,0MOV al,4int 10h;; Then set the palette color and background color in the 320x200 graphic mode;MOV ah,11MOV bh,1MOV bl,0int 10h;MOV ah,11MOV bh,0MOV bl,1int 10h;; Set the interrupt vector to point to the running boy's graphic data;MOV al,1fhMOV Dx,offset BoydMOV ah,25hint 21h;The boy's graphic is running in the upper left corner of the display screen.Frame1:mov ascii,80hMOV frame
To give you illustrator software users to detailed analysis to share the drawing of cute cartoon little boy portrait of the tutorial.
Tutorial Sharing:
Let's take a look at the results of the production:
Figure 1: Cartoon boy finish diagram
Before you do it, remember to familiarize yourself with the black arrows in the Illusrtator Toolbox (also called the Selecti
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