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Mongo: find items that don't have a certain field
...rpret it as the field has to be equal to null and not missing. This is actually unexpected behavior, because you wouldn't be able to do the same for 0 (which is also false), so null is kind of the exception here. Therefore, best practice is the more readable answer using $exists: false which is not ...
How to change spinner text size and text color?
... can't this be done by using style only? I am surprised how small stuff is so difficult to style in android.. this is frustrating.. I wished they had a styling system like css
– yeahman
Mar 14 '16 at 18:54
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Insert picture/table in R Markdown [closed]
...HOWTOs for tables and images. Top on my list are:
Pandoc readme, specifically tables
RStudio's RMarkdown, more details in basics (including tables) and a rewrite of pandoc's markdown.
Pictures are very simple to use but do not offer the ability to adjust the image to fit the page (see Update, be...
How to sort git tags by version string order of form rc-X.Y.Z.W?
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you can use homebrew or macports to install the gnu version of sort. brew install gsort then you can modify the line above to git tag -l | gsort -V and it should work for you.
– Goran
Feb 24 '14 at 13:16
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Missing return statement in a non-void method compiles
... the compiler even warn about returning something? Or why would a language allow us to have a non-void method having an infinite loop and not returning anything?
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Is there a splice method for strings?
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You can add this globally with: String.prototype.splice = function (index, count, add) { return this.slice(0, index) + (add || "") + this.slice(index + count); } Just keep in mind it doesn't work exactly the same as the array sp...
Generate colors between red and green for a power meter?
...ges using this code ... any ideas? For example, the following percentages all return RGB 1,255,0: 0.277, 0.222, 0.111 ... the higher values (for example 1.0) do return the correct RGBs with brighter green, but they stop trailing off after a threshold and I only get shades of green on my scale.
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How to style a JSON block in Github Wiki?
...So, I tried representing the JSON in different Language syntax formats.But all time favorites are Perl, js, python, & elixir.
This is how it looks.
The following screenshots are from the Gitlab in a markdown file.
This may vary based on the colors using for syntax in MARKDOWN file...
Can anybody push to my project on github?
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No, all repositories are read-only for anonymous users.
By default only the owner of the repository has write access. If you can push to your own repo, it's because you are using one of the supported authentification methods (HT...
MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query
... What if you want to update few columns? Replace will update all.
– imVJ
Sep 9 '16 at 10:27
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