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defaultdict of defaultdict?
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Yes like this:
defaultdict(lambda: defaultdict(int))
The argument of a defaultdict (in this case is lambda: defaultdict(int)) will be called when you try to access a key that doesn't exist. The return value of it will be set as the new value of this key...
Awaiting multiple Tasks with different results
...wait:
var catTask = FeedCat();
var houseTask = SellHouse();
var carTask = BuyCar();
await Task.WhenAll(catTask, houseTask, carTask);
var cat = await catTask;
var house = await houseTask;
var car = await carTask;
You can also use Task.Result (since you know by this point they have all completed ...
How to play with Control.Monad.Writer in haskell?
... to functional programming and recently learning at Learn You a Haskell , but when I went through this chapter , I got stuck with the program below:
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Sort a text file by line length including spaces
...-n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" " -f2-
In both cases, we have solved your stated problem by moving away from awk for your final cut.
Lines of matching len...
Query grants for a table in postgres
How can I query all GRANTS granted to an object in postgres?
7 Answers
7
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Android Bitmap to Base64 String
How do I convert a large Bitmap (photo taken with the phone's camera) to a Base64 String?
7 Answers
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HTML inside Twitter Bootstrap popover
I am trying to display HTML inside a bootstrap popover, but somehow it's not working. I found some answers here but it won't work for me. Please let me know if I'm doing something wrong.
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POST data with request module on Node.JS
This module is 'request https://github.com/mikeal/request
8 Answers
8
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Filter dataframe rows if value in column is in a set list of values [duplicate]
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edited Feb 25 at 0:45
Harvey
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ans...
Using usort in php with a class private function
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Make your sort function static:
private static function merchantSort($a,$b) {
return ...// the sort
}
And use an array for the second parameter:
$array = $this->someThingThatReturnAnArray();
usort($array, array('ClassName','merchantSort'));
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