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ansible: lineinfile for several lines?
... This was probably voted up before Ansible 2.0. A better answer is now: stackoverflow.com/a/28306576/972128
– kkurian
Jul 5 '17 at 20:10
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Python in Xcode 4+?
...longer work or are unclear due to changes in Xcode updates, please let me know. I will make the necessary corrections.
Open Xcode. The instructions for either are the same.
In the menu bar, click “File” → “New” → “New Project…”.
Select “Other” in the left pane, then "External...
Are custom elements valid HTML5?
...mitted in HTML5. This confirms Alochi's circular argument observation. 2) Nowhere does the spec say that custom elements are not permitted.
– d13
Mar 24 '12 at 9:59
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Open multiple Eclipse workspaces on the Mac
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But now I can't close the terminal window until I close eclipse
– Blundell
Jul 5 '12 at 7:37
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How can I check for NaN values?
...still in common use - and math.isnan was not part of the standard library. Now days I'm really hoping that's not the case in many places!
– mavnn
Mar 30 '15 at 7:30
4
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Is there a 'foreach' function in Python 3?
...-litb thing is that he is right... 'for' in python is literally 'foreach' known in other languages...in tcl for eg a 'for' loop would be something like for {stuff ran on beginning of loop} {condition here} {stuff that runs on each iteration} {commands here...} eg: for {set x 1} {$x <= 10} {incr x...
How to work with Git branches and Rails migrations
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@pisaruk I know you answered this six years ago, but reading I'm curious what an example of a non-reversible migration would be. I'm having a hard time imagining a situation. I guess the simplest would be a dropped column containing a ...
is guava-libraries available in maven repo?
...;
Note: the above version number may be outdated when you read this. To know the latest available version, you may look here
Version updated on 19th Oct 2017.
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What data type to use for hashed password field and what length?
... works (will be implementing it later), but need to create database schema now.
10 Answers
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Pandas: drop a level from a multi-level column index?
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As of Pandas 0.24.0, we can now use DataFrame.droplevel():
cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
df = pd.DataFrame([[1,2], [3,4]], columns=cols)
df.droplevel(0, axis=1)
# b c
#0 1 2
#1 3 4
This is very useful if you wan...