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What does ~> mean in a gem file [duplicate]
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so it means less than one plus the second digit?!?! what is the logic behind that?! what if you wanted it to be less than one plus the third digit. or less than one plus the first digit. Also can you provide a source
– bar...
How to get a list of file names in different lines
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ls -1. From the help:
-1 list one file per line
Works on cygwin and FreeBSD, so it's probably not too GNU-specific.
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Convert the values in a column into row names in an existing data frame
...hort, no there is no alternative to reassigning.
Edit: Correcting myself, one can also do it in place: assign rowname attributes, then remove column:
R> df<-data.frame(a=letters[1:10], b=1:10, c=LETTERS[1:10])
R> rownames(df) <- df[,1]
R> df[,1] <- NULL
R> df
b c
a 1 A
b ...
How to use setInterval and clearInterval?
...ns a handle you can use to cancel it via clearTimeout before it fires that one time if appropriate.)
setTimeout(drawAll, 20);
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Is there a way to rollback my last push to Git? [duplicate]
...hard HEAD@{1}
git push -f
git reset --hard HEAD@{1}
( basically, go back one commit, force push to the repo, then go back again - remove the last step if you don't care about the commit )
Without doing any changes to your local repo, you can also do something like:
git push -f origin <sha_of_...
Remove background drawable programmatically in Android
...in an onClick event, but need a visible button to show before your toggled ones take over (because nothing will show until the click event happens, so when it does, you can use setBackgroundResource(0) to remove your earlier "set" button drawable).
– Azurespot
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What’s the purpose of prototype? [duplicate]
...e;
}
The function does not have to be re-created each time; it exists in one place in the prototype. So when you call someAnimal.set_name("Ubu"); the this context will be set to someAnimal and (the one and only) set_name function will be called.
There is one advantage to using the first synta...
New transaction is not allowed because there are other threads running in the session LINQ To Entity
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What's happening is that you're using one SQL connection to iterate over a collection of DB entities, then using another connection to save changes. This happens because your classes are basically "married" to one instance of your db connection and cannot be chan...
“while :” vs. “while true” [duplicate]
... It's true. i=0; time while true; do ((i++>100000)) && break; done takes slightly longer than the colon version.
– Paused until further notice.
May 29 '12 at 12:50
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Accessing clicked element in angularjs
...lving this problem. With AngularJS the focus is on the model manipulation. One would mutate a model and let AngularJS figure out rendering.
The AngularJS-way of solving this problem (without using jQuery and without the need to pass the $event argument) would be:
<div ng-controller="AdminContro...