This tutorial will discuss multiple ways to add new key-value pair to dictionary in Python. Table Of Contents Method 1: Using dict.update() method Method 2: Using [] Operator of Dictionary Method 1: Using dict.update() method To add a new key-value pair to a dictionary, we can use the update method of a dictionary. It accepts […]
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This tutorial will discuss how to add value to dictionary if key already exists in Python. Suppose we have a dictionary, and it contains string names as keys and their mark as values. Like this, student_data = { "Varun Sharma": 21, "Renuka Singh": 19, "Sachin Roy": 20 } The type of value is integer. Now
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This tutorial will discuss how to adding duplicate key to a Python dictionary. We cannot add a duplicate key into a Python dictionary. The reason is that dictionary keys must be unique; there can be no duplicate keys. So, suppose we create an empty dictionary and add a key-value pair into it. Now, if we
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This tutorial will discuss how to check if string contains only numbers in PHP. To check if a string contains only numbers in PHP, we can use the ctype_digit() function. The ctype_digit() function accepts a string as an argument and returns true if all the characters in the string are numerical. If there is at
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This tutorial will discuss how to check if string contains letters in PHP. To check if a string contains any Letter in PHP, we can utilize regular expressions. The regex pattern that we can use is as follows, ‘/[a-zA-Z]/’ By passing this regex pattern and the string to the preg_match() function, we can determine if
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This tutorial will discuss multiple ways to check if string is blank in PHP. Table Of Contents Method 1: Using trim() function Method 2: Using regular expression Method 1: Using trim() function To check if a string is blank, we need to make sure that it is either empty or contains only blank spaces. For
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This tutorial will discuss how to check if string contains substring (case insensitive) in PHP. To check if a string contains a substring in a case-insensitive manner in PHP, we can use the stripos() function. The stripos() function accepts two strings as arguments i.e. a string and a subString. It returns the index position of
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This tutorial will discuss how to check if string contains a date in PHP. To check if a string contains a valid date in PHP, we will use the DateTime::createFromFormat() function. It accepts two parameters: The first is a string containing the format of the date The second is a string containing the actual date.
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This tutorial will discuss how to check if string contains any of array in PHP. Suppose we have a string and an array of strings. // A string $strValue = ‘This is some Random Text.’; // An Array of strings $words = [‘Document’, ‘some’, ‘Today’, ‘Final’]; Now, we want to check if the string contains
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This tutorial will discuss how to check if string contains a word in PHP. To check if a string contains a specific word in PHP, we can use the strpos() function. We convert both the string and the word to lowercase using the strtolower() function before calling strpos(). This allows us to perform a case-insensitive
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