What is the HEAD in git?

HEAD is a reference to the last commit in the currently checked-out branch. There is a small exception to this, which is the detached HEAD. A detached HEAD is the situation you end up in whenever you check out a commit (or tag) instead of a branch. In this case, you have to imagine this … Read more

Get first row value of a given column

To select the ith row, use iloc: In [31]: df_test.iloc[0] Out[31]: ATime 1.2 X 2.0 Y 15.0 Z 2.0 Btime 1.2 C 12.0 D 25.0 E 12.0 Name: 0, dtype: float64 To select the ith value in the Btime column you could use: In [30]: df_test[‘Btime’].iloc[0] Out[30]: 1.2 There is a difference between df_test[‘Btime’].iloc[0] (recommended) … Read more

How do I use ‘git reset –hard HEAD’ to revert to a previous commit? [duplicate]

First, it’s always worth noting that git reset –hard is a potentially dangerous command, since it throws away all your uncommitted changes. For safety, you should always check that the output of git status is clean (that is, empty) before using it. Initially you say the following: So I know that Git tracks changes I … Read more

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