How to convert a string in to a function in JavaScript?

Answered 18h 11m ago

To convert a string in to function "eval()" method should be used. This method takes a string as a parameter and converts it into a function.syntaxeval(string);ExampleIn the following example, in a string itself, a property called 'age' is assigned with a function. Later on, using eval() function the property age is converted into ... Read More

What is .htaccess in PHP?

Alok Prasad
Answered 18h 31m ago

.htaccess is a configuration file for use on web servers running on the web apache server software. when a .htaccess file is placed in a directory which in turn loaded via the Apache web server, then the .htaccess file detected and executed by the Apache server software. .htaccess files can be ... Read More

Can generator be used to create iterators in Python?

Answered 18h 32m ago

Yes, We can create a generator by using iterators in python Creating iterators is easy, we can create a generator by using the keyword yield statement. Python generators are an easy and simple way of creating iterators. and is mainly used to declare a function that behaves like an iterator.The generator ... Read More

What does immutable mean? Which Python types are mutable and which are not?

Answered 18h 45m ago

In Python, there are two types of Objects.Mutable ObjectImmutable ObjectMutable: Mutable objects are modified, (i.e) objects are a changeable list, set, dict, etc are mutable.mutable objects are easy to change.Example 1list =["Tutorials ", "Point", "Pvt", "Ltd"] list[2]= 'Tutorix' listOutput['Tutorials ', 'Point', 'Tutorix', 'Ltd'] Example 2list=['Car', 'Bike', 'Scooty', 'Bus', 'Metro'] list[4]= ... Read More

Program to find how many times a character appears in a string in PHP

Alok Prasad
Answered 18h 46m ago

Example: Live Demo<?php    $str = "welcome to tutorials point";    $str = str_replace(" ", "", $str);    $arr = str_split($str);    foreach ($arr as $key =>$val){       if (!isset($output[$val])){             $output[$val] = 1;       }       else{     ... Read More

How to create undefined "holes" in an array in JavaScript?

Answered 18h 56m ago

To create undefined holes try to add elements at higher indexes, leaving smaller indexes untouched. Those leftover smaller indexes will be filled by undefined holes. To understand it in detail lets look at the following example.ExampleIn the following example, only 3 elements were declared. Later on when at index 5, ... Read More

How to Create and Assign Lists in Python?

Answered 18h 58m ago

We can Create and Assign List by Insert, Append Length, Index, Remove and Extend, etc.. Lists are mutable and the changeble object is enclosed within the square brackets i.e [ ], Lists in python is easy.Examplelist =["Tutorials ", "Point", "Pvt", "Ltd"] listOutput['Tutorials ', 'Point', 'Pvt', 'Ltd'] Assign Values in Lists To assign values ... Read More

What is traits in PHP?

Alok Prasad
Answered 19h 4m ago

In 5.4 PHP version trait is introduced to PHP object-oriented programming. A trait is like class however it is only for grouping methods in a fine-grained and reliable way. It isn't permitted to instantiate a trait on its own. Traits are introduced to PHP 5.4 to overcome the problems of ... Read More

What are the tools that help to find bugs or perform static analysis in Python?

Answered 19h 17m ago

Pychecker and Pylint are the static analysis tools that help to find bugs in python.Pychecker is an opensource tool for static analysis that detects the bugs from source code and warns about the style and complexity of the bug.Pylint is highly configurable and it acts like special programs to control warnings and errors, it ... Read More

Is there any advantage to using __construct() instead of the class's name for a constructor in PHP?

Alok Prasad
Answered 19h 18m ago

Yes, there are several advantages to using the magic function __construct() instead of the class's name. Those are listed below:The magic function __construct is introduced in PHP 5.4. One advantage of using __construct() over ClassName() as a constructor is if you change the name of the class, you don't need ... Read More

Can we define a static constructor in Java?

raja ramesh
Answered 19h 21m ago

No, we cannot define a static constructor in Java, If we are trying to define a constructor with the static keyword a compile-time error will occur.In general, static means class level. A constructor will be used to assign initial values for the instance variables. Both static and constructor are different ... Read More

What is the importance of 'for await...of' statement in JavaScript?

Answered 20h 42m ago

for await...ofThe 'for await...of' statement creates a loop iterating over async objects and sync objects such as arrays, array-like objects, maps sets, etc.syntaxfor await (variable of iterable) { statement }ExampleIn the following example "for await...of" statement is used to loop over a normal array in an async format and integers were displayed ... Read More

When can we use intern() method of String class in Java?

raja ramesh
Answered 20h 57m ago

The intern() method of String class can be used to deal with the string duplication problems in Java. Using intern() we can save a lot of memory consumed by duplicate string instances. A string is duplicate if it contains the same content as another string but it can be occupied different memory ... Read More

What is dependency injection in PHP?

Alok Prasad
Answered 21h 6m ago

Dependency injection is a procedure where one object supplies the dependencies of another object. Dependency Injection is a software design approach that allows avoiding hard-coding dependencies and makes it possible to change the dependencies both at runtime and compile time.There are numerous approaches to inject objects, here are couple generally ... Read More

Is it possible to make a nested object immutable using Object.freeze() in JavaScript?

Answered 22h 16m ago

Object.freeze() method can make an object immutable but in case of a nested object, it can't prevent mutability. Object.freeze() can only provide immutability to the outside parent object, it can't access any inner child(nested) objects.ExampleIn the following example, there are no nested objects. Object.freeze() method will try to freeze the whole object. ... Read More

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