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Make xargs execute the command once for each line of input
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The following will only work if you do not have spaces in your input:
xargs -L 1
xargs --max-lines=1 # synonym for the -L option
from the man page:
-L max-lines
Use at most max-lines nonblank input lines per command line.
Trailing blank...
How do I represent a hextile/hex grid in memory?
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Thanks :) That page doesn't cover edges and vertices, but I cover them in the Relationships Between Parts section of my grids article at www-cs-students.stanford.edu/~amitp/game-programming/grids (the diagrams are for square grids but the table ...
How to rollback a specific migration?
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rake db:rollback STEP=1
Is a way to do this, if the migration you want to rollback is the last one applied. You can substitute 1 for however many migrations you want to go back.
For example:
rake db:rollback STEP=5
Will also rollback all the migration that ...
Android - get children inside a View?
... View nextChild = ((ViewGroup) viewGroup).getChildAt(index);
}
Will that do?
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Angular.js programmatically setting a form field to dirty
... my form with a value and I would like to set the field state to $dirty . Doing something like:
11 Answers
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Remove Safari/Chrome textinput/textarea glow
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Edit (11 years later): Don't do this unless you're going to provide a fallback to indicate which element is active. Otherwise, this harms accessibility as it essentially removes the indication showing which element in a document has focus. Imagine ...
Verify a certificate chain using openssl verify
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From verify documentation:
If a certificate is found which is its own issuer it is assumed to be the root CA.
In other words, root CA needs to self signed for verify to work. This is why your second command didn't work. Try this instea...
How did Google manage to do this? Slide ActionBar in Android application
I really want to implement this (the side navigation) in an app of my own, does anyone know how Google managed to do this?
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How do I remove blank elements from an array?
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There are many ways to do this, one is reject
noEmptyCities = cities.reject { |c| c.empty? }
You can also use reject!, which will modify cities in place. It will either return cities as its return value if it rejected something, or nil if no rej...
How do I programmatically determine if there are uncommitted changes?
...working tree or the index). What's the cleanest and most efficient way to do that? A command that exits with a return value of zero in one case and non-zero in the other would suit my purposes.
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