delphi collections

Originally from: http://my.oschina.net/pc100/blog/380016The procedure starts with the reserved word procedure, has no return value, and the function starts with the reserved word function and has a return value.Parameters are enclosed in parentheses, and multiple parameters are separated by semicolons, for example:Procedure SetDate (Year:integer; Month:integer; Day:integer);You can also group parameters of the same type together, and the above procedure title is written as:Procedure SetDate (yea

Today, I tried it .. something about delphi .. because you do not like to install and kill software .. because I still like high system efficiency... there is only 360 on the computer. usually look at your own port .. generally, it's okay. Today, when I compiled the software and went to the Virtual Machine for testing, how was it a virus? I saw the prompt of Kingsoft, and Delphi's nightmare was depressing (I often walked by the river and wet my shoes

There are several versions in the middle of Delphi 7 and Xe, which are not very popular. First, Delphi is somewhat marginalized, and second, 7 is almost perfect in the XP environment. There are fewer and fewer books on delphi on the market, and it is useless to provide information from 7 to Xe. Here I will try to list the differences and precautions between 7 and

I have known a value assignment instruction (mov) of an Assembly and an addition instruction (ADD), so I can give an example. For example: Add ax, BX; this is equivalent to ax: = AX + bx in Delphi; In addition, a list is provided in advance-Delphi can use assembler to manage the following registers:32-bit register: eax EBX ECx edX ESP EBP ESI EDI16-bit register: ax bx cx dx sp bp Si Di8-bit register:

Delphi In ODBC And ADOBoth ADO and ODBC are used to access the database. They are encapsulation of the underlying data driver and can be used to access the database during programming. In Delphi, BDE and ADO components are also provided. In the early stage of the project, the database used access and sqlserver, and ADO was used without consideration. MySQL was used in later projects, without the ADO dri

Using Delphi to make statistical charts Using the Dbchart control under Data controls (name set to DBCHT1), double click on Add to the type you want First query in Delphi, then add Dbcht1. Series[0]. xlabelssource:= ' field name '; Dbcht1. Series[0]. yvalues.valuesource:= ' field name '; Dbcht1. Series[0]. Datasource:=qry_1; Dbcht1. Title.Text.SetText (' Name of the chart '); The data can be disp

The 16th chapter of Delphi Database Program design----using BDE componentsDelphi accesses the database in the following ways: ADO, BDE, dbexpress, InterBase Express.One, Tdataset componentsAlthough Delphi has several ways to access the database, they must rely on tdataset. It is used to display all records obtained from a single or multiple data tables in a database.1. Tdataset Common PropertiesActive: Spec

Principle: Put the exe that needs to be included into the input source file, compile it with the original program into an exe file, release the exe when the program runs for the first time, and then call the exe file. Steps: 1. Create an rc file. It can be written in any text editor. File Format: "Resource Name resource type file name ". For the resource type, if it is an exe file, it should be an EXEFILE, and if it is a binary file, it is RCDATA. Create a file float. rc: Code Code highlighting

Following last night's article: http://blog.csdn.net/yxf/archive/2006/09/28/1303281.aspx, write a method that uses Delphi to write a client. Also called last night's libss.dll. 1. Create a new console application, called Sampleservice.invoker. 2. File->new->other, Web services/wsdl Importer, fill in the location of the WSDL File or URL http://localhost/MyServices/ Sampleservice/libss.dll/wsdl/isampleservice, then click Finish, then click Finish, then

'] ='New_value'Dic.setdefault (Key, None)#If the key key does not exist in the dictionary, it is assigned by dic[key] = default; _#DeleteDic.pop (Key[,default])#similar to the Get method. If there is a key in the dictionary, delete and return the key corresponding to the Vuale; if the key does not exist and the default value is not given, the keyerror exception is thrown;Dic.clear ()#Delete all items or elements in the dictionary;#Modifydic['Key'] ='New_value' #if key exists in the dic

Generally speaking, the data structure of the textbook includes array, single linked list, stack, tree, graph. The data structure I am referring to here is a question of how to represent an object, and sometimes a single variable declaration can be overwhelming, such as int,string,double or even one-dimensional arrays, and two-dimensional arrays cannot fully express what you want to express, and it is too much trouble to define class classes. You might consider using the

Solutions to a particular problem don't know how to save those objects if you don't know how many objects you need beforehand, or how long they will last. So how do you know how much space those objects require? You can't know ahead of time unless you're in the running period.In object-oriented design, the solution to most of the problems seems imprudent-simply to create another type of object. A new type of object to solve a particular problem holds a handle to another object. Of course, you ca

From [http://technet.microsoft.com/en-us/library/cc825328 (office.12). aspx] Some site collections within a database that hosts multiple site collections are growing faster than expected, and you need to CT the database to approach its size limit quickly. you can split the database to move the growing site collections to another database or to another server. S

This article introduces the Collections built-in module of Python. collections is a built-in module of python. the Source Code is Lib/collections/init. py. This module provides a common data container. Deque container object Import from collections import deque. when creating a deque container object, you can set the

NamedtupleNamedtuple is a function that creates a custom tuple object, specifies the number of tuple elements, and can refer to an element of a tuple using a property rather than an index.In this way, we can easily define a data type with namedtuple, which has the invariant of tuple and can be referenced according to the attribute, which is very convenient to use. >>> from collections import namedtuple>>> point = Namedtuple ("point", [' X ', ' y ']) >

In the interview, often encounter some of the problem of sorting algorithm, here, I simply listed a few of the most common sorting algorithms for everyone to learn, perhaps the next day interview exactly use, the second half of the article introduces the collections module, because this module relative to the basic data structure provided by Python (list,tuple,dict) are not familiar to people, but if you know them, it is very convenient and efficient

Import Collectionsc = Collections. Counter (' Abcdeabcdabcaba ')Print (c)Results: Counter ({' A ': 5, ' B ': 4, ' C ': 3, ' d ': 2, ' E ': 1})Conclusion: The number of occurrences of a statistical stringImport Collectionsc = Collections. Counter (' Abcdeabcdabcaba ')Print (c)ret = C.most_common (2)Print (ret)Results: [(' A ', 5), (' B ', 4)]Conclusion: The two most frequently occurring strings are countedIm

The methods in the Counter class of the python3 collections module are listed. Counter: the number of times that a Counter appears. Counter class inherits the dict class, so it can use the methods in the dict class Create a Counter class Import collectionsobj = collections. Counter ('abbccc') print (obj) # output: Counter ({'C': 3, 'A': 2, 'B': 2 }) Elements () Import collectionsobj =

Collections Module Knowledge Points Counter class Defaultdict class Namedtuple class In this experiment we will learn the Collections module. This module implements a number of good data structures that can help you solve a variety of practical problems.>>> import collectionsThis is how to import this module, now let's take a look at some of these classes.1. CounterCounteris a dict sub

very happy to know everyone here, I am also just contact with the backend development of the learner, I believe many friends in the study will encounter a lot of headache problems, I hope we can all share the problem, the study of their own ideas to sort out, we explore together to GROW. Today I am here to briefly explain my understanding of the collection in the Study. Many friends write explanations, not from the simplest, causing the confusion in reading, perhaps I can help you to have a new