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Understanding Arithmetic in Go Templates
When dealing with arrays in Go templates, the range action allows for iterating through elements along with their zero-based indices. While it's a common practice, the question arises when attempting to display indices that start from 1 instead of 0.
Attempting Direct Arithmetic
An initial effort to add 1 to the index via the expression {{$index 1}} fails, resulting in an "illegal number syntax: " " error." This highlights the lack of built-in arithmetic operations within templates.
Custom Function Approach
To overcome this limitation, it's necessary to create a custom function that handles the arithmetic. In the provided code snippet:
In conclusion, while Go templates do not support direct arithmetic operations, creating custom functions like the "inc" function allows for more flexible processing and manipulation of values in templates. This approach provides a robust and customizable solution for handling arithmetic calculations in your Go templates.
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