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Mongod complains that there is no /data/db folder

..., e.g. sudo mkdir -p /data/db Or you need to do su - to become superuser, and then create the directory with mkdir -p /data/db Note: MongoDB also has an option where you can create the data directory in another location, but that's generally not a good idea, because it just slightly complicate...
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NoSql Crash Course/Tutorial [closed]

I've seen NoSQL pop up quite a bit on SO and I have a solid understanding of why you would use it (from here, Wikipedia, etc). This could be due to the lack of concrete and uniform definition of what it is (more of a paradigm than concrete implementation), but I'm struggling to wrap my head aroun...
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Add disabled attribute to input element using Javascript

I have an input box and I want it to be disabled and at the same time hide it to avoid problems when porting my form. 7 Ans...
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Why git AuthorDate is different from CommitDate?

I lookup my git logs and find that the AuthorDate and CommitDate is slightly different for some of my commits: 2 Answers ...
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apache to tomcat: mod_jk vs mod_proxy

What are the advantages and disadvantages of using mod_jk and mod_proxy for fronting a tomcat instance with apache? 3 A...
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What happens if you call erase() on a map element while iterating from begin to end?

In the following code I loop through a map and test if an element needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()? ...
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catch exception that is thrown in different thread

...( Method1 ) spawns a new thread. That thread execute a method ( Method2 ) and during exectution an exception is thrown. I need to get that exception information on the calling method ( Method1 ) ...
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HTTP GET Request in Node.js Express

...I need to connect to another service. I am hoping the call is asynchronous and that the callback contains the remote server's response. ...
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passing argument to DialogFragment

... args.putInt("num", num); f.setArguments(args); return f; } And get the Args like this @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mNum = getArguments().getInt("num"); ... } See the full example here http://developer.a...
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How to remove underline from a link in HTML?

...parating your CSS means more than aliasing css in your html. Eg class="big-and-red" is aliasing not seperation. class="meaningful-domain-item" then css .meaningful-domain-item { //big and red } is. This answer sufficient to remind me which tag to use in my css +1. – Nathan Coop...