In AWK, you can reformat text by manipulating fields, lines, and files using a combination of built-in variables, functions, and control structures. Here are some commonly used techniques for reformatting text in AWK: – **Field manipulation:** You can manipulate fields (columns) in a line using the built-in variables `$1`, `$2`, etc., and the `NF` variable. … Read more
In AWK, you can join and merge data from multiple files using a combination of control structures, arrays, and built-in functions. Here are some commonly used techniques for joining and merging data in AWK: – **Arrays:** AWK provides arrays that you can use to store and manipulate data. Here are some commonly used array-related functions: … Read more
In AWK, you can summarize data using a combination of built-in variables, functions, and control structures. Here are some commonly used techniques for summarizing data in AWK: – **Built-in Variables:** AWK provides several built-in variables that you can use to summarize data. Here are some commonly used built-in variables: – `NR`: The number of records … Read more
In AWK, you can filter and sort data using a combination of control structures, regular expressions, and built-in functions. Here are some commonly used techniques for filtering and sorting data in AWK: – **Conditional statements:** You can use conditional statements (`if`, `else if`, and `else`) to filter data based on certain criteria. The syntax for … Read more
In AWK, you can read and write files using the `getline` function and file redirection. Here are some commonly used functions and techniques for file handling in AWK: – **`getline` function:** The `getline` function is used to read a line from a file. The syntax for using `getline` is as follows: ` getline [variable] < … Read more
In AWK, the `gsub` function is used for advanced string manipulation, allowing you to replace all occurrences of a pattern within a string with another string. The syntax for using `gsub` is as follows: gsub(regexp, replacement, target) – `regexp` is the regular expression to search for. – `replacement` is the string to replace the matched … Read more
Arrays are an important data structure in AWK that allow you to store and manipulate collections of values or elements. In AWK, there are two types of arrays: indexed arrays and associative arrays. – **Indexed Arrays:** Indexed arrays are arrays where elements are accessed using an index or position number. The index starts at 1 … Read more
In AWK, you can define your own functions to encapsulate reusable code and make your programs more modular and readable. Here is the syntax for defining a user-defined function: function name(args) { # code to execute return value; } – `name` is the name of the function. – `args` is a comma-separated list of arguments … Read more
In AWK, there are several control structures that can be used to control the flow of execution in a program. Here are some commonly used control structures: – **if-else statements:** Used to conditionally execute a block of code. ` if (condition) { # code to execute if condition is true } else { # code … Read more
In AWK, there are many built-in functions that can be used for string manipulation, math, and more. Here are some commonly used functions: – **String manipulation functions:** – `length(str)`: Returns the length of a string. – `substr(str, start, length)`: Returns a substring of a string starting from `start` and with a length of `length`. – … Read more