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Lesson 2: The 'Undo'

Git doesn't have a CTRL Z equivalent -- it does have a souped up set of commands that give you finer grained control of how you want to backtrack.

Git: reset vs. checkout vs. restore vs. switch vs. revert

It's certainly understandable if distinguishing these commands is just out of reach or requires a few Google/Stackoverflow searches each time you reach for

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Lesson 1: The Basics

The goal for this lesson is to bolster your confidence using git. We won't attempt a comprehensive review, but we will try to establish a more holistic understanding of what it is, what it isn't, and how you can begin to make it work for you.

This is not:

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import os
from itertools import product
from random import randint
from time import sleep


class Cell:
    def __init__(self, state):
        self._state = state
        self._future_state = state

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## Source: https://stackoverflow.com/questions/24342047/count-consecutive-occurences-of-values-varying-in-length-in-a-numpy-array/24343375#24343375

def longest_runs_sim(n: int = 50) -> int:
    # Random sequence where each n_i is element of {0, 1}
    seq = np.random.randint(0, 2, n)

    longest_runs = {1: None, 0: None}
    for i, outcome in enumerate([~seq, seq]):
        runs = \
            np.diff( # Diff of indices counts runs

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-- Set counter variables
set @r1=0, @r2=0, @r3=0, @r4=0;

with

  cte_pivot as (
    select 
      case 
        when Occupation='Doctor' then (@r1:=@r1+1)
        when Occupation='Professor' then (@r2:=@r2+1)

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with recursive 

  cte_expand as (
    select Number, Frequency as i from histogram
    union all
    select Number, i-1 as i from cte_expand where i > 1
  )
  
select Number from cte_expand
order by 1

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# Lint JSON with python (the exit 255 stops xargs after the first failed command) 
find . -name "*.json" -print | xargs -Ixx bash -c "echo JSON linting xx 1>&2; cat xx | python -mjson.tool > /dev/null || exit 255"

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Pushing to Multiple Git Repos

If a project has to have multiple git repos (e.g. Bitbucket and Github) then it's better that they remain in sync.

Usually this would involve pushing each branch to each repo in turn, but actually Git allows pushing to multiple repos in one go.

If in doubt about what git is doing when you run these commands, just

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from IPython.core.display import display, HTML

def display_side_by_side(dfs:list, captions:list):
    """Display tables side by side to save vertical space
    Input:
        dfs: list of pandas.DataFrame
        captions: list of table captions
    """
    output = ""
    combined = dict(zip(captions, dfs))

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def substring_list_match(string_list, substr_list):
    return [target_str for target_str in string_list if any(search_str in target_str for search_str in substr_list)]