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Two way/reverse map [duplicate]

I'm doing this switchboard thing in python where I need to keep track of who's talking to whom, so if Alice --> Bob, then that implies that Bob --> Alice. ...
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How to run a Runnable thread in Android at defined intervals?

I developed an application to display some text at defined intervals in the Android emulator screen. I am using the Handler class. Here is a snippet from my code: ...
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How to install a gem or update RubyGems if it fails with a permissions error

I'm trying to install a gem using gem install mygem or update RubyGems using gem update --system , and it fails with this error: ...
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How to get number of rows using SqlDataReader in C#

My question is how to get the number of rows returned by a query using SqlDataReader in C#. I've seen some answers about this but none were clearly defined except for one that states to do a while loop with Read() method and increment a counter. ...
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How do you check whether a number is divisible by another number (Python)?

I need to test whether each number from 1 to 1000 is a multiple of 3 or a multiple of 5. The way I thought I'd do this would be to divide the number by 3, and if the result is an integer then it would be a multiple of 3. Same with 5. ...
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Dynamic variable names in Bash

I am confused about a bash script. 14 Answers 14 ...
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Best way to obfuscate an e-mail address on a website?

I've spent the past few days working on updating my personal website. The URL of my personal website is (my first name).(my last name).com, as my last name is rather unusual, and I was lucky enough to pick up the domain name. My e-mail address is (my first name)@(my last name).com. So really, when i...
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How can I push a specific commit to a remote, and not previous commits?

I have made several commits on different files, but so far I would like to push to my remote repository only a specific commit. ...
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How do you select a particular option in a SELECT element in jQuery?

If you know the Index, Value or Text. also if you don't have an ID for a direct reference. 21 Answers ...
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Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?

Why are the following expressions different? 7 Answers 7 ...