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mongoDB/mongoose: unique if not null
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This answer did it for me too.
– Emmanuel N K
Dec 17 '18 at 2:46
1
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CursorLoader usage without ContentProvider
Android SDK documentation says that startManagingCursor() method is depracated:
5 Answers
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Disable git EOL Conversions
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Inside your project, there should be a .gitattributes file. Most of the time, it should look like below (or this screen-shot):
# Handle line endings automatically for files detected as text
# and leave all files detected as bi...
Getting individual colors from a color map in matplotlib
...255210428, 0.99923106502084169, 0.74602077638401709, 1.0)
For values outside of the range [0.0, 1.0] it will return the under and over colour (respectively). This, by default, is the minimum and maximum colour within the range (so 0.0 and 1.0). This default can be changed with cmap.set_under() and...
What is the benefit of using Fragments in Android, rather than Views?
When developing for Android , you can set your target (or minimum) sdk to 4 (API 1.6) and add the android compatibility package (v4) to add support for Fragments . Yesterday I did this and successfully implemented Fragments to visualize data from a custom class.
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Why is rbindlist “better” than rbind?
...get in a muddle of rownames using do.call(rbind, list(...))
see
How to avoid renaming of rows when using rbind inside do.call?
Memory efficiency
In terms of memory rbindlist is implemented in C, so is memory efficient, it uses setattr to set attributes by reference
rbind.data.frame is implemen...
How to convert a Title to a URL slug in jQuery?
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I have no idea where the 'slug' term came from, but here we go:
function convertToSlug(Text)
{
return Text
.toLowerCase()
.replace(/ /g,'-')
.replace(/[^\w-]+/g,'')
;
}
First replace will change s...
Master-master vs master-slave database architecture?
...n everybody is out of the water, and if people are remote then may pay horrid communication costs. Bring portable devices, which may need to operate disconnected, into the picture and one copy won't cut it.
Master Slave: consistency is not too difficult because each piece of data has exactly one ow...
What is the difference between Gemfile and Gemfile.lock in Ruby on Rails
...0.0) requires bundler (>= 1.3.0, < 2.0)), which causes problems. Any idea how to avoid those 'open' dependencies?
– Guillermo Grau
Apr 4 '14 at 9:23
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Determining type of an object in ruby
...be particular about the type.
For example, object.is_a?(String) is too rigid since another class might implement methods that convert it into a string, or make it behave identically to how String behaves. object.respond_to?(:to_s) would be a better way to test that the object in question does what ...