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Define make variable at rule execution time
...TMP/hi.txt ;\
tar -C $$TMP cf $@ . ;\
rm -rf $$TMP ;\
I have consolidated some related tips here: https://stackoverflow.com/a/29085684/86967
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Mockito: Stubbing Methods That Return Type With Bounded Wild-Cards
Consider this code:
5 Answers
5
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angularJS: How to call child scope function in parent scope
...
$scope.get = function(){
return "LOL";
}
}
Working fiddle: http://jsfiddle.net/wUPdW/2/
UPDATE: There is another version, less coupled and more testable:
function ParentCntl($scope) {
$scope.msg = "";
$scope.get = function(){
$scope.$broadcast ('someEvent');
...
warning about too many open figures
...f or .cla on your figure object instead of creating a new figure. From @DavidZwicker
Assuming you have imported pyplot as
import matplotlib.pyplot as plt
plt.cla() clears an axis, i.e. the currently active axis in the current figure. It leaves the other axes untouched.
plt.clf() clears the enti...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...td. dev. of 7 runs, 10 loops each)
60x faster than zip
In general, avoid using apply
Apply is generally not much faster than iterating over a Python list. Let's test the performance of a for-loop to do the same thing as above
%%timeit
A1, A2 = [], []
for val in df['a']:
A1.append(val**2)
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What is App.config in C#.NET? How to use it?
...ned schema that you can use. Note that this small snippet is actually a valid app.config (or web.config) file:
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="MyKey"
connectionString="Data Source=localhost;Initial Catalog=ABC;"
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How to redirect output with subprocess in Python?
...ntation for subprocess):
p = subprocess.Popen(my_cmd, shell=True)
os.waitpid(p.pid, 0)
OTOH, you can avoid system calls entirely:
import shutil
with open('myfile', 'w') as outfile:
for infile in ('file1', 'file2', 'file3'):
shutil.copyfileobj(open(infile), outfile)
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How can I convert immutable.Map to mutable.Map in Scala?
...liased imports, but bear in mind that sacrificing immutability is very non-idiomatic for Scala, not exactly the sort of thing I'd enourage by making it look even easier... Out of curiosity, how else could you propose doing it more cleanly, if not via a copy?
– Kevin Wright
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Wait for a void async method
How can I wait for a void async method to finish its job?
6 Answers
6
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Chaining multiple filter() in Django, is this a bug?
...ries/#spanning-multi-valued-relationships
particularly:
Everything inside a single filter() call is applied simultaneously to filter out items matching all those requirements. Successive filter() calls further restrict the set of objects
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In this second example (filter(A).filter(B)), ...