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get_value 

        # IO::Buffer.get_value

(from ruby core)
### Implementation from Buffer
---
    get_value(type, offset) -> numeric

---

Read from buffer a value of `type` at `offset`. `type` should be one of
symbols:

*   `:U8`: unsigned integer, 1 byte
*   `:S8`: signed integer, 1 byte
*   `:u16`: unsigned integer, 2 bytes, little-endian
*   `:U16`: unsigned integer, 2 bytes, big-endian
*   `:s16`: signed integer, 2 bytes, little-endian
*   `:S16`: signed integer, 2 bytes, big-endian
*   `:u32`: unsigned integer, 4 bytes, little-endian
*   `:U32`: unsigned integer, 4 bytes, big-endian
*   `:s32`: signed integer, 4 bytes, little-endian
*   `:S32`: signed integer, 4 bytes, big-endian
*   `:u64`: unsigned integer, 8 bytes, little-endian
*   `:U64`: unsigned integer, 8 bytes, big-endian
*   `:s64`: signed integer, 8 bytes, little-endian
*   `:S64`: signed integer, 8 bytes, big-endian
*   `:f32`: float, 4 bytes, little-endian
*   `:F32`: float, 4 bytes, big-endian
*   `:f64`: double, 8 bytes, little-endian
*   `:F64`: double, 8 bytes, big-endian


Example:

    string = [1.5].pack('f')
    # => "\x00\x00\xC0?"
    IO::Buffer.for(string).get_value(:f32, 0)
    # => 1.5

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