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Unable to create/open lock file: /data/mongod.lock errno:13 Permission denied
...enied'.
First I ran sudo service mongodb stop.
Then I used ls -la to see what group & owner mongodb assigned to /var/lib/mongodb (existing path) and I changed the /data/db (new path) with chown and chgrp to match. (example: sudo chown -R mongodb:mongodb /data/db)
Then I updated the path in etc...
Interfaces with static fields in java for sharing 'constants'
...l wrong. If you do not want your constants to leak through - regardless in what type of object you put them - you need to make sure they are NOT part of the exported code. Interface or class, both can be exported. So the right question to ask is not: in what type of object do I put them in but how d...
Get a specific bit from byte
...Bit-shifting, to produce the number we want to compare against, is exactly what it sounds like: take the number, represented as a set of bits, and shift those bits left or right by a certain number of places. Because these are binary numbers and so each bit is one greater power-of-two than the one t...
How do you convert a time.struct_time object into a datetime object?
...times, I cannot stress enough that it would behoove you to look closely at what your time.struct_time object is providing, vs. what other time fields may have.
Assuming you have both a time.struct_time object, and some other date/time string, compare the two, and be sure you are not losing data and...
Jackson with JSON: Unrecognized field, not marked as ignorable
...e first result, so they end up up-voting this and Suresh's response (thats what happened to me). Although the original question has nothing to do with wanting to ignore undefined properties.
– Ric Jafe
Nov 14 '14 at 15:50
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Does every Core Data Relationship have to have an Inverse?
...ge at the moment that I'm writing this) for a more thorough explanation of what the docs mean when they say that inverse relationships help maintain data integrity.
– Mark Amery
Jul 3 '13 at 22:02
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How to get a resource id with a known resource name?
...have the Android.R namespace imported as it can confuse Eclipse (if that's what you're using).
If that doesn't work, you can always use a context's getResources method ...
Drawable resImg = this.context.getResources().getDrawable(R.drawable.resource);
Where this.context is intialised as an Acti...
Going from a framework to no-framework [closed]
...osity, I decided to also start looking at standalone components and here's what I've found so far:
Templating:
PHP Template Inheritance (Regular PHP plus template inheritance)
TWIG (Django/Jinja2/Liquid-style syntax including autoescape and sandboxing. Compiles to cached PHP for speed.)
Dwoo (A f...
How can I tell if a library was compiled with -g?
...er whether the archive/shared library was built with or without -g option
What really helped me to determine whether -g was used is readelf tool:
readelf --debug-dump=decodedline libinspected.so
or
readelf --debug-dump=line libinspected.so
This will print out set of lines consisting of source...
Centering a background image, using CSS
... make a temporary example at www.jsfiddle.net and post a link for us. From what you've said, the image is 1600x1200 and most screen resolutions don't go that high, try resizing your image to fit. I use a widescreen monitor at 1440x900 for example.
– Kyle
Apr 15...