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Define make variable at rule execution time
...ariable to the result of the shell function call.
edit (in response to comments):
To create a unique variable, you could do the following:
out.tar :
$(eval $@_TMP := $(shell mktemp -d))
@echo hi $($@_TMP)/hi.txt
tar -C $($@_TMP) cf $@ .
rm -rf $($@_TMP)
This would prepend the n...
Android encryption / decryption using AES [closed]
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Hey this not works for me, I am getting Badpadding exception while decrypting the same.
– Sanat Pandey
Nov 18 '11 at 13:40
34
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What are the differences between Deferred, Promise and Future in JavaScript?
...tempted to answer the OP's question. The literal answer is, a promise is something shared w/ other objects, while a deferred should be kept private. Primarily, a deferred (which generally extends Promise) can resolve itself, while a promise might not be able to do so.
If you're interested in the m...
What does android:layout_weight mean?
I don't understand how to use this attribute. Can anyone tell me more about it?
13 Answers
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How does zip(*[iter(s)]*n) work in Python?
... a list containing n quantity of x, i.e. a list of length n, where each element is x. *arg unpacks a sequence into arguments for a function call. Therefore you're passing the same iterator 3 times to zip(), and it pulls an item from the iterator each time.
x = iter([1,2,3,4,5,6,7,8,9])
print zip(x,...
How do I update a GitHub forked repository?
...d the original GitHub repository as a "remote". ("Remotes" are like nicknames for the URLs of repositories - origin is one, for example.) Then you can fetch all the branches from that upstream repository, and rebase your work to continue working on the upstream version. In terms of commands that ...
How do I ignore the initial load when watching model changes in AngularJS?
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$scope.$watch('fieldcontainer', function() {
if (initializing) {
$timeout(function() { initializing = false; });
} else {
// do whatever you were going to do
}
});
The flag will be tear down just at the end of the current digest cycle, so next change won't be blocked.
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Finding Number of Cores in Java
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int cores = Runtime.getRuntime().availableProcessors();
If cores is less than one, either your processor is about to die, or your JVM has a serious bug in it, or the universe is about to blow up.
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What is the right way to override a setter method in Ruby on Rails?
...w if the following is a "proper"/"correct"/"sure" way to override a setter method for a my class attribute.
5 Answers
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How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly
I have a dataframe with ~300K rows and ~40 columns.
I want to find out if any rows contain null values - and put these 'null'-rows into a separate dataframe so that I could explore them easily.
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