substring
A substring is a portion of a string, obtained using an index or slicing operation.
Python:
text = "Hello World"sub = text[0:5] # "Hello"Java:
String text = "Hello World";String sub = text.substring(0, 5); // "Hello"Always remember indices start at 0 in most programming languages.
Off-by-one errors when choosing start and end indices.
Joining two or more strings together.
Python:
name = "Data" + "Science" # "DataScience"Java:
String name = "Data" + "Science"; // "DataScience"Concatenation is often used to build dynamic messages or outputs.
Forgetting that + in Python/Java works only for strings, not numbers (without conversion).
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Paywall
(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.
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