Use C ++ 11 to implement C ++ 17 apply (Dynamic Array Used as function parameter) and apply Array
The title is incorrect. apply uses tuple as the parameter to call a function. This title is used to better adapt to search keywords.
Dynamic Arrays used as function parameters are more suitable for C ++ programs embedded in the script environment, such as lua or java
Differences between cross apply and outer apply:
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Declare @ t table (Name: varchar (10 ))
Insert into @ T values ('zhang san ')
Insert into @ T values ('Li si ')
Insert into @ T values ('wang 'er ')
Insert into @ T values (null)
Declare @ T2 table (Name: varchar (10), course varchar (10), score: INT)Insert in
Explore the students ' consumption of wineData See GitHubStep 1-Import the necessary librariesImport Pandas as PD Import NumPy as NPStep 2-Data set" ./data/student-mat.csv " Step 3 Name The data studentStudent = Pd.read_csv (PATH4) Student.head ()Output:Step 4 Slice the data from ' school ' to ' Guardian '" School ":"Guardian"]stud_alcoh.head ()Output:Step 5 Create a lambda function that captures a stringLambda x:x.upper ()Step 6 capitalize the ' Fjob ' columnstud_alcoh['Fjob'].
Declare
@ T
Table
(Name
Varchar
(
10
))
Insert
Into
@ T
Values
(
'
Zhang San
'
)
Insert
Into
@ T
Values
(
'
Li Si
'
)
Insert
Into
@ T
Values
(
'
Wang 'er
'
)
Insert
Into
@ T
Values
(
Null
) Declare @ T2 Table (Name Varchar ( 10 ), Course Varchar ( 10 ), Score Int ) Insert Into @ T2 Values ( ' Zhang San ' , ' Chinese ' , 74 ) Insert Into
Apply the configuration device to development and apply the configuration device
To run an application on a device,
First, set the device to allow it to run non-Google Play Store applications:
For devices of Android 4.1 or earlier versions, select "Settings"> "application items" and select "Unknown Source.
For Android 4.2 devices, select "Settings"> "security", and select "Unknown Source.
Second, you also
Apply for urgent review after submission by iOS, and apply for urgent review after submission by ios
I have heard of the urgent review before and never used it. It was awesome yesterday. I submitted the application at nearly 8 o'clock (Beijing time) last night. I checked it at work this morning and it has passed the review. It can be downloaded from the AppStore.
The reason for the urgency is a miserable re
Process introduction:1. First, in the login status, click "Apply for contract" in the upper-right corner of the home page to enter the application page of the guild host;2. Select the guild to join at the bottom of the page and click "Apply for Anchor ";3. Read and agree to the "user service terms" and click "next;4. Fill in the complete personal information and click &quo
How to apply for anchor in Dragon Ball live
1. The relevant information submitted already exists (such as QQ number, identity card number duplicate)
2.QQ nickname is empty or triggers a sensitive word system on the TGA platform (prompts "user name not conforming to specification")
3. You have been to the TGA before the live broadcast, but the live room has been cancelled or closed stop.
From the above we have done another one is
There's a problem in the group:
What is the result of the following pop-up?
var a = function.prototype.call.apply (function (a) {return a}, [0,4,3])
Alert (a)
Scroll bar to bottom view results
RELATED links: about Call and apply
The result is 4, and the following is the process:
The Apply method is executed first, and then the following method is constructed
var B = (function (a) {alert (this);//0
return A;
Apply, call
In JavaScript, call and apply are meant to change the context in which a function is run, in other words, to change the direction of this inside the function body.
One of the big features of JavaScript is that the function has the concept of "definition-time context" and "Run-time context" and "context is something that can be changed."
First come a chestnut:
function fruits () {}
fru
Before learning apply (), we have to understand the role of this and how to use it, and refer to my previous article, "Fast Understanding the usage and pitfalls of this in JavaScript." Of course if you are already familiar with this information, then
Please look straight down.
The function of call () and apply () is very similar, except for the difference in parameter types to accommodate different usage sc
In JavaScript, call, apply, and bind are the three methods of a function object, and the main effect of these three methods is to change the this point in the functions so that the ' move to the flower ' effect can be achieved. This article will explain the three methods in detail and list a few classic scenarios.
Call (Thisargs [, args ...])
The method can pass a Thisargs parameter and a list of arguments, Thisargs specifies the caller of the func
In JavaScript, the point of this is dynamic, and it is possible to accidentally break this point in the process of writing a program, so we need a technique that can fix the meaning of this, so we have the three methods of call,apply and bind, To change the point of this inside the function body, because the function has the concept of "definition-time context" and "Run-time context" and "context can be changed"
The new Apply table operator applies the right table expression to each row in the left table expression. It does not compute that table expression as a join, and the apply must first compute the left expression logically. The logical order of this calculation input allows the right expression to be associated with the left-table expression.
Apply has two forms
Apply: When you pass one or more arguments to a variable (object) in parentheses, Scala turns it into a call to the Apply methodVal Array=array (1,2,3,4,5,6)Array (0), the operation of the first element of the array is converted to the array.apply (0) operation, which also explains why the Scala array value is not enclosed in parentheses, because it is also a method call.Anyobject ("Key1") will be converted
One, call (), apply (), bind () method
In JavaScript, a method is invoked to replace another object by calling or apply, changing the object context of a function from the initial context to the new object specified by Thisobj. The simple thing is to change the context in which the function executes, which is the most basic usage. The basic difference of two methods is that the parameters are different.
C
If you are learning JavaScript this free and changeable language in the process of experiencing this feeling, then from the beginning, please put down your "prejudice", because this is absolutely a new continent for you, let Javascrip slowly melt before a set of coagulation programming consciousness, inject new vitality!Well, to start with, understand the Javascrtipt dynamic transformation Run-time context characteristics, which is mainly embodied in the application, call two methods of use.Dist
If you haven't contacted a dynamic language, it will be a magical and weird feeling to understand JavaScript in a compiled language, because the things that are often impossible in consciousness happen, and even feel unreasonable. If you're learning JavaScript in a free and changing language, this is the way you feel. , then from now on, please put down your "prejudice", because this is absolutely a new continent for you, let Javascrip slowly melt before a set of coagulation programming consciou
Apply
Apply Functions over Array MarginsUse functions against column rows or columns
Apply (X, MARGIN, fun, ...)
Lapply
Apply a Function over a List or VectorUsing functions on lists or vectors
Lapply (X, fun, ...)
Sapply
Apply a F
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