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Javascript Articles
Page 147 of 534
Return the sum of two consecutive elements from the original array in JavaScript
An Array is known as collection of similar data elements which are stored at contiguous memory locations. Array is such a simple data structure where we can access each data element in the array with the help index numbers, which starts from 0. The following is the basic declaration of array in JavaScript − const mobiles = ["SAMSUNG", "ONEPLUS", "APPLE"]; Sum of two consecutive elements of an array We are required to write a JavaScript function that takes in an array of Numbers and returns a new array with elements as sum of two consecutive elements from ...
Read MoreHow to implement merge sort in JavaScript?
Merge Sort The Merge Sort algorithm, where we can sort the elements in a particular order. This algorithm is also considered as an example of divide and conquer strategy. In merge sort algorithm, firstly the array will be divided into two parts and combined a particular sorted manner. The array will be divided into half until it cannot be divided. This means that if the array is completely divided and cannot be further divided, the dividing will be stopped. We divide the arrays into halves and implement merge sort on each of the halves. This algorithm is a ...
Read MoreHow to Split large string in to n-size chunks in JavaScript?
A string is an order of one or more characters that contain numbers, letters, symbols, or special characters. In JavaScript strings are immutable. i.e., once you create a string you cannot change its value. For example, consider the following snippet here we have created a string variable and assigned a value (Tutorialspoint) to it. In the next statement, we are trying to change the contents of the string at the first index. Then we are displaying the contents of the string. let x = 'Tutorialspoint'; x[0] = 't'; console.log(x); //Tutorialspoint. On executing this code ...
Read MoreSort array of objects by string property value in JavaScript
The given task is to sort an array of objects by using string property value in JavaScript. Assume there is an array of objects and we need to sort those elements by using the string property. In this below scenario, we are sorting array of objects by "company" property. const array = [ {Company: 'Oneplus', Manufacturing: 'China'}, {Company: 'Samsung', Manufacturing: 'South korea'}, {Company: 'Nothing', Manufacturing: 'India'} ]; Output = // it sorted the array of objects by "company" property. [ {"Company":"Nothing", "Manufacturing":"India"}, {"Company":"Oneplus", "Manufacturing":"China"}, ...
Read MoreHow to replace elements in array with elements of another array in JavaScript?
The given task is to replace the elements in an array with elements of another array. Input-Output Scenario Let’s look into some input-output scenarios. Consider there are there two arrays with elements in it. The first array is having more elements than the second array and we are replacing a part of elements in the first array with the elements from second array. Array1 = [1, 3, 5, 7, 2, 4]; Array2 = [3, 6]; Output = [3, 6, 5, 7, 2, 4] // elements got replaced Let’s consider another scenario, where the elements in the first array are ...
Read MoreBest way to find length of JSON object in JavaScript
In this article, the given task is to get the best way of finding the length of a JSON object in JavaScript. Input-Output Scenario Let’s look into this input-output scenario. Consider there is an object with some keys and values in it. we need to get the length of the object. const MyObj = { Name: "Mike", Age: 34 }; document.write(Object.keys(MyObj).length); // Output: 2 Using Object.keys() The Object.keys() method will return the output in form of array of a given object’s own enumerable properties names. It will return the output of keys ...
Read MoreRemoving Negatives from Array in JavaScript
The given task is to remove the negative values from the array. Input-Output Scenario Let’s look into input output scenarios. Consider there is an array and it is having both negative and positive integer values. We need to remove the negative values from the array and return the array. Input = [-2, 5, -7, 32, 78, -32]; Output = [5, 32, 78] Now let’s assume there are no negatives integer values in the array. so, the array will be returned in the same order. Input = [56, 43, 12, 67, 69, 34]; Output = [56, 43, 12, 67, 69, ...
Read MoreJoin arrays to form string in JavaScript
The given task is to perform joining arrays to form strings in JavaScript. Input-Output Scenario Let’s look into some input-output scenarios. Consider there is an array having some elements in it and we are trying to join that array to form the string. Input = [32, 45, 65, 12, 07, 55]; Output = 32, 45, 65, 12, 07, 55 //String Let’s look into another scenario, where we are having two arrays and we are trying to join those two arrays and form a string. Array1 = [123, 453, 656, 654, 125, 757]; Array2 = ["Hello", "honey", "bunny"]; Output = ...
Read MoreMatch specific word in regex in JavaScript?
The task is to match a specific word or character which is in regex with a string. The regex (regular expressions) is a pattern that is used to match character combinations in strings. Here we include the test(), match(), and matchAll() methods to match the following word in regex. We have some boundary-type assertions, in which we have used \b. Consider a sentence – “mickey is holding mic.” Using regex - \bmic\b will match the word mic but not the word mic in mickey. It is a word boundary. Another assertion is (g), It is a global search flag. Consider ...
Read MoreReorder an array in JavaScript
The given task is to reorder an array in JavaScript. We can reorder the elements in the array by using the following methods. One of the ways to achieve the above task is b using sort() method. The sort() is an in-built method in JavaScript, which sorts the alphabetic elements. By default, it sorts in ascending order. Example Following is the example where the array got reordered in ascending order − const States = ["Telangana", "Uttar Pradesh", "Karnataka", "Kerala", ...
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