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Articles on Trending Technologies
Technical articles with clear explanations and examples
Mojeek Alternatives
What is Mojeek? Mojeek is a search engine which provides search results on the basis of its own index of web pages. It does not rely on other search engines to provide results. Mojeek has its own crawler that helps in making an index. Different sets of results will always be found for a query. It also uses its own ranking algorithm to give rank to web pages and URLs. Why Mojeek Alternatives? A large index is needed to provide search results The user interface needs improvement How to Choose a Mojeek Alternative? There are many advantages to ...
Read MoreHeroku Alternatives
What is Heroku? Heroku is a cloud-based app that developers use to manage, scale, and deploy different apps. The platform is easy to use and provides great opportunities for developers to launch their apps in the market. There is no need to maintain and manage any servers, hardware, or infrastructure. The app has many features which developers can use to enhance their productivity. Why Heroku Alternatives? Low network performance High inbound and outbound latency Servers cannot be easily controlled Complex apps cannot be developed The cost is high Switching from one platform to another is difficult How to ...
Read MoreWhat is Direct Mapping Process in Computer Architecture?
Direct mapping is a procedure used to assign each memory block in the main memory to a particular line in the cache. If a line is already filled with a memory block and a new block needs to be loaded, then the old block is discarded from the cache.The figure shows how multiple blocks from the example are mapped to each line in the cache.Just like locating a word within a block, bits are taken from the main memory address to uniquely describe the line in the cache where a block can be stored.Example − Consider a cache with = ...
Read MoreDouble Revolving Field Theory of Single-Phase Induction Motors
Operating Principle of Single-phase Induction MotorA single-phase induction motor consists of a squirrel cage rotor and a stator carrying a single-phase winding. When a single-phase AC supply is fed to the stator winding, a pulsating magnetic field (not the rotating) is produced. Under these conditions, the rotor does not rotate due to inertia. Hence, a single-phase induction motor is inherently not self-starting, but requires some auxiliary starting means.If the stator winding of a single-phase induction motor is excited and the rotor is rotated by an auxiliary means and the starting device is then removed, the motor continues to rotate in ...
Read MoreWhat is LEX?
It is a tool or software which automatically generates a lexical analyzer (finite Automata). It takes as its input a LEX source program and produces lexical Analyzer as its output. Lexical Analyzer will convert the input string entered by the user into tokens as its output.LEX is a program generator designed for lexical processing of character input/output stream. Anything from simple text search program that looks for pattern in its input-output file to a C compiler that transforms a program into optimized code.In program with structure input-output two tasks occurs over and over. It can divide the input-output into meaningful ...
Read MoreHow to change Azure Subscription in PowerShell?
To change the azure subscription using PowerShell, we can use the Select-AZSubscription command. When you use this command, you can use either the subscription ID, Subscription Name, or the Tenant ID.ExampleWith Subscription Name,Select-AzSubscription -SubscriptionName 'Visual Studio'With TenantID,Select-AzSubscription -Tenant 'XXXX-XXXXX-XXXXXXX-XXXX'With Subscription ID,Select-AzSubscription -SubscriptionId 'XXXX-XXXXX-XXXXXXX-XXXX'Sometimes on console messages will appear that one or more subscriptions are active. In that case, you can switch the other subscription using the Set-AZContext command and you can use subscription ID or the Name for it.ExampleSet-AzContext -SubscriptionId "xxxx-xxxx-xxxx-xxxx" OrSet-AzContext -SubscriptionName "Visual Studio"
Read MoreHow to add/remove values in the array in PowerShell?
An array is always a fixed size. To add value to the array, you need to create a new copy of the array and add value to it. To do so, you simply need to use += operator.For example, you have an existing array as given below.$array = 1, 2, 3, 4, 5To add value “Hello” to the array, we will use += sign.$array += "Hello"Now, we will check the output of the array.We have another method to add value to the array. By Add() operation of the array.$array.Add("Hi")When you use the above method to add a variable in the ...
Read MoreDifference Between Hashtable and Synchronized Map in Java
A HashTable is a compact abstract data set which converts the keys of a map to the values by computing the indexes into an array of slots to enable faster data access. On the other hand, a synchronized map is a Java collection class which is mainly used to synchronize a particular map to make it a thread safe collection and can be applied on a whole object. The map does not contain any null value. Input [ ARB, RDD, KOL, DHKA ] Output Insertion Order of objects in HashTable : [ ARB, RDD, KOL, DHKA ] Insertion Order of objects in Synchronized Map : [ ...
Read MoreDifference Between IdentityHashMap, WeakHashMap, and EnumMap in Java
The IdentityHashMap is a special type of hash class by which we handle the rare cases related to the reference-equality. This map compares the keys by using a " = = " operator where the normal hashmap uses the " equals " method for this. A Weak HashMap is a type of map interface where the hash table merges its keys with the weak reference type of values. This type of map class can not be used further just because of the lack of reference pointers. An enum map is a special type of map class which contains only the ...
Read MoreDifference and similarities between HashSet , LinkedHashSet and TreeSet in Java
The HashSet, LinkedHashSet and TreeSet are the set interface class mainly used to store the elements. HashSet − A HashSet is a container instance which stores the unique elements only in a non synchronized manner to handle the high-performance operations involving with the set. The set allows the null values which does not follow the order of insertion. LinkedHashSet − The LinkedHashSet is a cloned data structure which have the both facilities of a hashtable and linked list as a set interface. The ordered version of a LinkedHashSet always works as a doubly linked list on over the input elements. TreeSet ...
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