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How to run multiple shells on Emacs
I am using Emacs 23.3.1 on windows 7. I know that I can run shell from emacs using M-x shell. I would like to have multiple shell windows in the same time, but typing M-x shell a second time just opens me the same shell window.
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How do I print out the contents of an object in Rails for easy debugging?
I think I'm trying to get the PHP equivalent of print_r() (print human-readable); at present the raw output is:
8 Answers...
How do you delete all text above a certain line
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Rich
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answered Nov 12 '10 at 5:38
Andy WhiteAndy Wh...
Filename too long in Git for Windows
I'm using Git-1.9.0-preview20140217 for Windows. As I know, this release should fix the issue with too long filenames. But not for me.
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How to determine if a list of polygon points are in clockwise order?
Having a list of points, how do I find if they are in clockwise order?
23 Answers
23
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How to create a .NET DateTime from ISO 8601 format
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This solution makes use of the DateTimeStyles enumeration, and it also works with Z.
DateTime d2 = DateTime.Parse("2010-08-20T15:00:00Z", null, System.Globalization.DateTimeStyles.RoundtripKind);
This prints the solution perfectly.
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Message 'src refspec master does not match any' when pushing commits in Git
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Maybe you just need to commit. I ran into this when I did:
mkdir repo && cd repo
git remote add origin /path/to/origin.git
git add .
Oops! Never committed!
git push -u origin master
error: src refspec master does not match any.
All I had to do was:
git commit -m "initial...
How to join (merge) data frames (inner, outer, left, right)
...function and its optional parameters:
Inner join: merge(df1, df2) will work for these examples because R automatically joins the frames by common variable names, but you would most likely want to specify merge(df1, df2, by = "CustomerId") to make sure that you were matching on only the fields you d...
The cast to value type 'Int32' failed because the materialized value is null
... executed as code, but rather translated into SQL. Sometimes this is a "leaky abstraction" that yields unexpected behaviour.
One such case is null handling, where there can be unexpected nulls in different places. ...DefaultIfEmpty(0).Sum(0) can help in this (quite simple) case, where there might ...
Is the order guaranteed for the return of keys and values from a LinkedHashMap object?
I know LinkedHashMap has a predictable iteration order (insertion order). Does the Set returned by LinkedHashMap.keySet() and the Collection returned by LinkedHashMap.values() also maintain this order?
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