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How to sort a datafra<em>mem>e by <em>mem>ultiple colu<em>mem>n(s)
I want to sort a data.fra<em>mem>e by <em>mem>ultiple colu<em>mem>ns. For exa<em>mem>ple, with the data.fra<em>mem>e below I would like to sort by colu<em>mem>n z (descending) then by colu<em>mem>n b (ascending):
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Break when a value changes using the Visual Studio debugger
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In the Visual Studio 2005 <em>mem>enu:
Debug -&a<em>mem>p;gt; New Breakpoint -&a<em>mem>p;gt; New Data Breakpoint
Enter:
&a<em>mem>p;a<em>mem>p;<em>mem>yVariable
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Git error on co<em>mem><em>mem>it after <em>mem>erge - fatal: cannot do a partial co<em>mem><em>mem>it during a <em>mem>erge
...in a conflict. I resolved the conflict and everything is fine now (I used <em>mem>ergetool also).
17 Answers
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Sorted collection in Java
I'<em>mem> a beginner in Java. Please suggest which collection(s) can/should be used for <em>mem>aintaining a sorted list in Java. I have tried <em>Mem>ap and Set , but they weren't what I was looking for.
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How can I stage and co<em>mem><em>mem>it all files, including newly added files, using a single co<em>mem><em>mem>and?
How can I stage and co<em>mem><em>mem>it all files, including newly added files, using a single co<em>mem><em>mem>and?
12 Answers
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Convert a Python list with strings all to lowercase or uppercase
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It can be done with list co<em>mem>prehensions. These basically take the for<em>mem> of [function-of-ite<em>mem> for ite<em>mem> in so<em>mem>e-list]. For exa<em>mem>ple, to create a new list where all the ite<em>mem>s are lower-cased (or upper-cased in the second snippet), you would use:
&a<em>mem>p;gt;&a<em>mem>p;gt;&a<em>mem>p;g...
Getting an “a<em>mem>biguous redirect” error
The following line in <em>mem>y Bash script
11 Answers
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How to re<em>mem>ove selected co<em>mem><em>mem>it log entries fro<em>mem> a Git repository while keeping their changes?
I would like to re<em>mem>ove selected co<em>mem><em>mem>it log entries fro<em>mem> a linear co<em>mem><em>mem>it tree, so that the entries do not show in the co<em>mem><em>mem>it log.
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Postgres and Indexes on Foreign Keys and Pri<em>mem>ary Keys
Does Postgres auto<em>mem>atically put indexes on Foreign Keys and Pri<em>mem>ary Keys? How can I tell? Is there a co<em>mem><em>mem>and that will return all indexes on a table?
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Delete files older than 10 days using shell script in Unix [duplicate]
I'<em>mem> new to shell scripts, can anyone help? I want to delete scripts in a folder fro<em>mem> the current date back to 10 days.
The scripts looks like:
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