Imagine you have a string: "The quick brown fox jumps over the lazy dog." Now, let's say you want to replace every occurrence of the word "the" with "a". Here's a simple code example that demonstrates how to do this:
In the above example, we used the
replace method with a regular expression. Notice the
g stands for global, and
i stands for case-insensitive, ensuring all instances are replaced regardless of their case.
replace method is a part of the String object's prototype. It takes two parameters: the substring to be replaced (or a regular expression) and the replacement string.
If you're only replacing a single occurrence or a substring that doesn't repeat, you can use a simple string literal:
For global replacement, you'll need to use a regular expression with the
To make your replacement case-insensitive, add the
i flag to your regular expression:
If the string you're replacing contains special characters (like
?), you'll need to escape them with a backslash (
For more complex replacements, you can pass a function as the second parameter:
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