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Detailed usage of tstringlist in Delphi

Tstringlist class is a pair of the most factory used in Delphi, we look at the detailed usage of tstringlist here together. Let's start by listing several properties to be discussed:1, CommaText2, Delimiter Delimitedtext3, Names Values Valuefromindex Tstrings is an abstract class that, in actual development, is the most applied except for the basic type. Tstringlist Common Methods and properties: Var List:tstringlist; I:integer; Begin List: = tstringlist.create; List.add (' Strings1 '); Add

Python Data Analysis learning-re Regular expression module

tuple of two elements. print(re.sub(‘X‘‘Mr. Iceman‘‘attn: X\n\nDear X,\n‘))attn: Mr. Iceman Dear Mr. Iceman,print(re.subn(‘X‘‘Mr. Iceman‘‘attn: X\n\nDear X,\n‘))(‘attn: Mr. Iceman\n\nDear Mr. Iceman,\n‘, 2) The object method of the re module and the regular expression split () is similar to how a string should work, but rather than splitting a fixed string, they are based on a pattern-delimited string of regular expressions, adding some extra power to the string-delimited function

String, how many objects have you created ????

Java code String STR = new string ("AAA "); How many string objects have been created in this line of code? The answer is 2, not 3. Because new string ("AAA") is equivalent to "AAA" and the original Instance Object created when it is placed in the heap, and the other is the "AAA" object in the constant pool, of cour

How many objects did the string create?

Java code String str=New string ("AAA"); How many string objects does this line of code create? The answer is 2 instead of 3. Since the new String ("AAA") is equivalent to "AAA" and one is the original instance object that was created when placed in the heap, and the other is the "AAA" object placed in th

JQuery Source Callbacks

The Callbacks tool method, which functions as a unified management of function callbacks Jquery.callbacks = function (options) {} is used: Similar to event binding, after fire, the previously bound method is executed. Viewer mode. function aaa () {alert (1); } function bbb () {alert (2); } function CCC () {alert (3)} var cb = $. Callbacks (); Cb.add (AAA); Cb.add (BBB); Cb.add (CCC); Cb

JS Array method

instanceofDetects if an object is an array; (used to deal with complex data types;)Simple data type typeof;A instanceof b//A is not made of B;Cases:var arr = [n/a];Console.log (arr instanceof Array); The arr genus is not of type array;Array.isarray ()Array.isarray (parameter); Determines whether the parameter is an array, returns a Boolean value;Cases:var arr = [n/a];var num = 123;Console.log (Array.isarray (arr)); TrueConsole.log (Array.isarray (num)); FalseToString ()Array. toString (); Turns

JQuery Source: Deferred Object supplement.

Deferred Helper (3132)When is a helper method for delaying object deferred. var DFD = $. Deferred (); Create a deferred object DFD. Done (); Dfd.fail (); Used: $.when (). done (); $.when (). fail ();The return value of when, is a lingering object.Source: Return Deferred.promise ();As an example: when you can wait for multiple lingering objects to succeed, the trigger succeeds.Example: (1)Success must be successful for more than one. function

Array manipulation in JS

Array API Api:application programming Interface, application programming interface; JS in the object provided by the method is called the API; instanceof检测一个对象是否是数组;(用来对付复杂数据类型;)// 简单数据类型 typeof ;A instanceof B // A是不是B造出来的;例: var arr = [1,2,3]; console.log(arr instanceof Array); //arr属不属于Array类型;Array.isarray ()Array.isArray(参数); // 判断参数是不是数组,返回布尔值;例: var arr = [1,2,3]; var num = 123; console.log(Array.isArray(arr)); //true console.log(Array.isArray(num)); /

[Linux knowledge] server performance test-UnixBench

########################## ################## ############################ ################# ################## ############################ Version 5.1.3 Based on the Byte Magazine Unix Benchmark Multi-CPU version Version 5 revisions by Ian Smith, Sunnyvale, CA, USA January 13,201 1 johantheghost at yahoo period com 1 x Dhrystone 2 using registervariables 1 2 3 4 5 6 7 8 9 10 1 x Double-Precision Whetstone 1 2 3 4 5 6 7 8 9 10 1 x Execl Throughput 1

Linux Operations ENGINEER1.1 (configure mail server, database management base, table data Management)

' password ';---gront select on nsd.* to [e-mail protected] identified by ' 123 '; //Allow John Doe to query NSD all dataTo view authorization information:>select User.password from Mysql.user;Union Table query:Nsd>select * from base.location where base.name = ' Barara ' and location.city= ' Sunnyvale ' and base.id=location.id;Nsd>select Count (*) from base.location where base.name = ' Barara ' and location.city= '

function declarations and function expressions

1. What is a function declaration, function expressionFunctions declaration: Function Function name () {}Functional expression: Function name () {}. The function name can be written without writing. Written, is named function expression, do not write is anonymous function expressionExample:function aaa () {};var a=function aaa () {}; named function expressionvar a=function () {}; anonymous function expressi

Originally... Why the parameters of a copy constructor must use a reference type

argument/n"; } Cexample (const cexample Ex) //copy constructor { M_ntest = Ex.m_ntest; cout "Copy constructor/n"; } cexample operator = (const cexample EX)//Assignment function (Assignment operator overload) { cout "Assignment operator/n"; M_ntest = Ex.m_ntest; return * this; } void Mytestfunc (Cexample ex) { } }; int main () { Cexample aaa (2); Cexample BBB (3); BBB =

HCNA Configuring Telnet remote Management

1. Topology diagramDescription: The configuration will eventually be able to log on to R4 via R5 with the Telnet protocol and rename R4 to R442. R4 Configurationsysenter system View, return user view with Ctrl+z.[huawei]sysname R4[r4]user-inch[R4]user-interface Vty [R4]user-interface vty0 4[R4-ui-vty0-4]au [R4-ui-vty0-4]authentication-mode AAA[R4-ui-vty0-4]Q[R4]AAA[R4-A

In-depth SQL oracle recursive query

☆Retrieve all table names and column names of the databaseSelect name from sysobjects where xtype = 'U'Select name from syscolumns where id = (select max (id) from sysobjects where xtype = 'U' and name = 'table name ')☆Recursive Data QueryRecursive query of SqlServer2005 and Oracle in SQL statementsI used Oracle before and thought that its recursive query is very useful. I studied SqlServer and found that it also supports recursive query in SQL.Example:The SQL statement of SqlServer2005 is as fo

"Python" xpath-1

1, coverage package implementation code Coverage (1) pip install coverage (2) Coverage run xx.py (test script file) (3) Coverage report-m print out Coverage Information Report (4) coverage in the console HTML generates a Htmlcov file in the same directoryfolder, open index.html in folders to view code coverage in a graphical interface2, Xpath Understanding(1) XPath is a language that looks for information in an XML document.XPath is used to navigate through elements and attributes in an XML docu

Deep understanding of String__java in Java

constant pool. So the relationship between C, Chenssy, pool chenssy should be: c--->chenssy---> Pool chenssy. The whole relationship is as follows: Through the above figure we can very clearly understand their relationship. So we modify the value in memory, and he changes it all. Summary: Although a, B, C, and Chenssy are different objects, we can understand them from the internal structure of string. String c = new String ("Chenssy"), although the content of C is created in the heap, but his

Function declaration and expression in js, js function declaration expression

Function declaration and expression in js, js function declaration expression// Function declaration: function name (){}// Function expression: function name (writable or not) () {}: anonymous function expression// Function aaa () {}: function declaration// Var a = function aaa () {}: name function expression// Var a = function () {}: anonymous function expression(Function

Python Basics Finishing Notes (vii)

One. Python's class attributes and instance properties are a point of attention1 classTestatt ():2AAA = 103 4 defMain ():5 #Case 16Obj1 =Testatt ()7Obj2 =Testatt ()8 Printobj1.aaa, obj2.aaa, Testatt.aaa9 Ten #Case 2 OneOBJ1.AAA + = 1 A Printobj1.aaa, obj2.aaa

JavaScript inheritance details and sample code, and javascript sample code

the prototype chain of another object.For differences between the two methods, see JavaScript isPrototypeOf vs instanceof usage. Only use prototype chain for inheritance Disadvantages: 1. The prototype property of the reference type value will be shared by the instance; 2. When creating a child-type instance, parameters cannot be passed to the super-Type constructor. functionFather(){this.name ="father";this.friends = ['aaa','bbb'];}functionSon(){}So

Linux Novice Literacy

: Cal 2016//view the Year 2016 calendarUser's environment variable:/home/user/.bash_profileSystem Environment variables:/etc/profileConfigure the. bashrc file to specify that some programs start automatically when the user logs on:One user on the system:/home/user/.BASHRCEntire system (all users):/ETC/BASHRCLinux Start-Up process Analysis BIOS self-test; Start Grub/lilo; Run the Linux kernel and detect the hardware; Run the system's first process init; Init reads the inf

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