Fixed guide and improved examples

[jorgecarleitao]

No description provided.

[codecov]

Codecov Report

Merging #1247 (9f9ead3) into main (212cdf3) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1247      +/-   ##
==========================================
+ Coverage   83.14%   83.15%   +0.01%     
==========================================
  Files         359      359              
  Lines       38063    38063              
==========================================
+ Hits        31646    31652       +6     
+ Misses       6417     6411       -6     

Impacted Files	Coverage Δ
src/io/ipc/write/common.rs	80.67% <100.00%> (ø)
src/io/ipc/write/writer.rs	94.21% <100.00%> (ø)
src/io/ipc/read/file.rs	97.32% <0.00%> (ø)
src/io/ipc/read/common.rs	95.29% <0.00%> (+0.39%)	⬆️
src/array/fixed_size_binary/mod.rs	88.00% <0.00%> (+0.50%)	⬆️
src/array/utf8/mod.rs	83.64% <0.00%> (+0.92%)	⬆️
src/bitmap/utils/slice_iterator.rs	98.78% <0.00%> (+1.21%)	⬆️

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