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Here, we have set “Aabout_us” and “Hhome_page” with incorrectly spellings as anchor text.You can use substring(1) along with innerHTML to remove the first character and display them correctly as “about_us” and “home_page” respectively.Example Live Demo Document Aabout_us Hhome_page [...document.querySelectorAll('.linkDemo div a')].forEach(obj=> obj.innerHTML=obj.innerHTML.substring(1)) To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output with the correct forms ... Read More
Let’s say the following are our arrays −var firstArray=[100, 200, 400]; var secondArray=[400, 100, 200];You can sort both the arrays using the sort() method and use for loop to compare each value as in the below code −Examplevar firstArray=[100, 200, 400]; var secondArray=[400, 100, 200]; function areBothArraysEqual(firstArray, secondArray) { if (!Array.isArray(firstArray) || ! Array.isArray(secondArray) || firstArray.length !== secondArray.length) return false; var tempFirstArray = firstArray.concat().sort(); var tempSecondArray = secondArray.concat().sort(); for (var i = 0; i < tempFirstArray.length; i++) { if (tempFirstArray[i] !== tempSecondArray[i]) return false; } ... Read More
To access nested JSON property based on another property’s value, the code is as follows −Examplevar actualJSONData = JSON.parse(studentDetails()), studentMarks = getMarksUsingSubjectName(actualJSONData, "JavaScript"); console.log("The student marks="+studentMarks); function getMarksUsingSubjectName(actualJSONData, givenSubjectName){ for(var tempObj of actualJSONData){ if(tempObj.subjectName = givenSubjectName){ return tempObj.marks; } } } function studentDetails(){ return JSON.stringify( [ { firstName : "John", subjectName: "JavaScript", marks : 97 }, { firstName : "David", subjectName: "Java", marks : 98 } ] ); }To run the above ... Read More
To replace value from a specific position, use splice() in JavaScript. Following is the code −Examplevar changePosition = 2 var listOfNames = ['John', 'David', 'Mike', 'Sam','Carol'] console.log("Before replacing="); console.log(listOfNames); var name = 'Adam' var result = listOfNames.splice(changePosition, 1, name) console.log("After replacing="); console.log(listOfNames)To run the above program, you need to use the following command −node fileName.js.OutputHere, my file name is demo14.js. This will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo154.js Before replacing= [ 'John', 'David', 'Mike', 'Sam', 'Carol' ] After replacing= [ 'John', 'David', 'Adam', 'Sam', 'Carol' ]
We can add a new column in an existing table as per the business requirements. Similarly, we can also remove a column from the table. This could be done using the ALTER table command as below.ALTER TABLE TAB1 ADD COLUMN ADDRESS VARCHAR(100);The ALTER TABLE reserved words are followed by the name of the table which we want to amend. In this case it is TAB1.To add a new column we will use ADD COLUMN and to remove the column we will use the REMOVE COLUMN parameter. This is followed by the name of the column. If this is an addition ... Read More
Constraints are used to restrict the data inserted at a particular column. Constraints can be used in such a way that a value can only be inserted if it satisfies the condition given in constraints. We can give the below parameter during CREATE TABLE command to add a constraint.CREATE TABLE DBSET1.TAB1 (STUDENT_ID CHAR(10) NOT NULL, ENROLLMENT_ID CHAR(20) NOT NULL, NAME VARCHAR(50), AGE SMALLINT CONSTRAINT NUMBER CHECK (AGE >=3 AND AGE
An index is a lookup table that optimizes the searching of data. An index defined on any table can increase the query speed. The index can be built up on any column of the table and DB2 will generate a logical structure at backend. This will facilitate the search on the table using indexed columns effectively.An index can be unique and non-unique. To create a new unique index at any table we can use below command.CREATE UNIQUE INDEX ENROTAB1 ON TAB1 (ENROLLMENT_ID) ASC;The CREATE UNIQUE INDEX reserved words are followed by the name of the unique index which we ... Read More
A table is a logical structure of a data in a DB2. A table consists of a column which represents the attribute and rows represents the entity. Below command can be issued in order to create a new DB2 table.CREATE TABLE DBSET1.TAB1 (STUDENT_ID CHAR(10) NOT NULL, ENROLLMENT_ID CHAR(20) NOT NULL, NAME VARCHAR(50), AGE SMALLINT PRIMARY KEY (STUDENT_ID));The CREATE TABLE reserved words are followed by the name of the table which we have to create in the format . Here DBSET1 is the database and TAB1 is the table.The name of the column has to be ... Read More
A Volume is a group of physical disks which are used to store the data. A storage group is a collection of volumes. We can add or remove the volumes in a storage group in order to adjust the space. Below command can be issued in order to amend the volume in a storage group.ALTER STG1 ADD VOLUMES(VOL34) REMOVE VOLUMES(VOL29);The ALTER reserved word has to be followed by the name of the storage group which needs to be altered. Which is STG1 in this case. The ADD VOLUMES parameter has the list of volumes which needs to be ... Read More
Bufferpool is the unit of the main memory which is used to cache the data in the DB2 table. The data is stored in the cache once the database manager reads the data from the disk to the main memory. The bufferpool can be defined by giving the pagesize.The page is the smallest unit of Input/Output that a DB2 database manager can handle. We can create a DB2 bufferpool using the below command−CREATE BUFFERPOOL BP3 PAGESIZE 4096;The CREATE and BUFFERPOOL reserved words are followed by the bufferpool name which we want to create. Finally we will use PAGESIZE parameter to ... Read More