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Articles by Syed Abeed
Page 2 of 3
How to find the Index of a string in Golang?
Strings.Index is a built-in function in Golang that returns the index of the first instance of a substring in a given string. If the substring is not available in the given string, then it returns -1.SyntaxThe syntax of Index() is as follows −func Index(s, substring string) intWhere, s – Original given stringsubstring – It is the string whose Index value we need to findExample 1Let us consider the following example −package main import ( "fmt" "strings" ) // Main function func main() { // Initializing the Strings x := "Learn Golang on Tutorialspoint" ...
Read MoreReplace() vs ReplaceAll() in Golang
ReplaceAll() function in Golang replaces all the occurrences of a given substring with a new value. In contrast, Replace() function is used to replace only some characters in a string with a new value. It replaces only a specified "n" occurrences of the substring.SyntaxThe syntax of ReplaceAll() is as follows −func ReplaceAll(s, old, new string) stringWhere, s is the given stringold is the string which we want to replace, andnew is string which will replace the old string.Example 1Let us consider the following example −package main import ( "fmt" "strings" ) func main() { // Initializing ...
Read MoreHow to check if a string starts with a specified Prefix string in Golang?
The HasPrefix() function of string class in Golang is used to check whether a given string begins with a specified Prefix string or not. It returns True if the given string begins with the specified prefix string; otherwise it returns False.Syntaxfunc HasPrefix(s, prefix string) boolWhere x is the given string. It returns a Boolean value.ExampleIn this example, we are going to use HasPrefix() along with an if condition to check wheter the two defined variables are starting with the same Prefix string or not.package main import ( "fmt" "strings" ) func main() { // Initializing ...
Read MoreHow to use the Fields() function in Golang?
The strings package of Golang provides a Fields() method, which can be used to split a string around one or more instances of consecutive whitespace characters.The Fields() function splits a given string into substrings by removing any space characters, including newlines. And it treats multiple consecutive spaces as a single space.Syntaxfunc Fields(s string) []stringWhere s is the string parameter.ExampleLet us consider the following example −package main import ( "fmt" "strings" ) func main() { // Initializing the Strings string1 := " The Golang Programming Language " // Display the Strings fmt.Println("Input String:", string1) ...
Read MoreWhat is the EqualFold function in Golang?
The EqualFold() function in Golang is an inbuilt function of strings package which is used to check whether the given strings (UTF-8 strings) are equal. The comparison is not case-sensitive. It accepts two string parameters and returns True if both the strings are equal under Unicode case-folding (i.e., case-insensitive), False otherwise.Syntaxfunc EqualFold(s, t string) boolWhere s and t are strings. It returns a Boolean value.ExampleThe following example demonstrates how to use EqualFold() in a Go program −package main import ( "fmt" "strings" ) func main() { // Intializing the Strings R := "Welcome to Tutorialspoint" ...
Read MoreHow to count the number of repeated characters in a Golang String?
Count() is a built-in function is Golang that can be used to count the number of non-overlapping instances of a character/string in a string.Syntaxfunc Count(s, sep string) intWhere, s – Original Stringsep – Substring which we want to count.It returns an Integer value.ExampleThe following example demonstrates how you can use the Count() function in a Go program.package main import ( "fmt" "strings" ) func main() { // Initializing the Strings x := "Golang Programming Language" y := "Language" // Display the Strings fmt.Println("First String:", x) fmt.Println("Second String:", y) ...
Read MoreHow to use Contains() function in Golang?
Golang has a set of built-in string functions that we can utilize to perform different types of operations on string data. Contains() is such a function that can be used to search whether a particular text/string/character is present in a given string. If the text/string/character is present in the given string, then it returns True; else it returns False.Syntaxfunc Contains(s, substr string) boolWhere, s is the original string and substr is the string which is to be checked with the original string.ExampleThe following example demonstrates how Contains() works −package main // importing fmt and strings import ( "fmt" ...
Read Morenumpy.matrix Method in Python
The numpy.matrix method is used to interpret a given input as a matrix. It returns a matrix from an array-like object. Its syntax is as follows −numpy.matrix(data, dtype=None, copy=bool)where, data - It is the input data.dtype - It represents the data type of the output matrix.copy - If the input data is already an ndarray, then this flag copy determines whether the data is to be copied (default behavior), or whether a view is to be constructed.Example 1Let us consider the following example −# import numpy library import numpy as np # matrix function y = np.matrix([[4, 5], [7, ...
Read Morenumpy.triu Method in Python
The numpy.triu() method can be used to get the upper triangle of an array. Its syntax is as follows −Syntaxnumpy.triu(m, k=0)where, m - number of rows in the array.k - It is the diagonal. Use k=0 for the main diagonal. k < 0 is below the main diagonal and k > 0 is above it.It returns a copy of the array after replacing all the elements above the kth diagonal with zero.Example 1Let us consider the following example −# import numpy library import numpy as np # create an input matrix x = np.matrix([[6, 7], [8, 9], [10, 11]]) ...
Read Morenumpy.vander Method in Python
The numpy.vander() method is used to generate a Vandermonde (Vander) matrix. A Vander matrix contains a geometric progression in each row, for example, $$\mathrm{A =\begin{bmatrix}1 & 2 & 4 \1 & 3 & 9 \1 & 5 &25\end{bmatrix} or\: B = \begin{bmatrix}1 & 4 & 16 \1 & 6 &36 \end{bmatrix}}$$SyntaxIts syntax is as follows −numpy.vander(x, N=None, increasing=False)ParametersIt accepts the following parameters −x - This is the input array.N - It is the number of columns in the output. By default, it is None.Increasing - If increasing=True, then the power increases from left to right. If increasing=False, then powers are ...
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