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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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Update
data.table v1.9.6+ now supports OP's original atte<em>mem>pt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
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What does the WPF star do (Width=“100*”)
What does exactly the star in size ter<em>mem>s in WPF <em>mem>ean?
4 Answers
4
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Passing HT<em>Mem>L to te<em>mem>plate using Flask/Jinja2
I'<em>mem> building an ad<em>mem>in for Flask and SQLAlche<em>mem>y, and I want to pass the HT<em>Mem>L for the different inputs to <em>mem>y view using render_te<em>mem>plate . The te<em>mem>plating fra<em>mem>ework see<em>mem>s to escape the ht<em>mem>l auto<em>mem>atically, so all
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cannot load such file — zlib even after using rv<em>mem> pkg install zlib
I installed zlib package and ruby 1.9.3 using rv<em>mem>, but whenever I try to install
ge<em>mem>s it says
cannot load such file -- zlib
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How safe is it to store sessions with Redis?
I'<em>mem> currently using <em>Mem>ySql to store <em>mem>y sessions. It works great, but it is a bit slow.
3 Answers
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Create a dictionary on a list with grouping
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var groupedDe<em>mem>oClasses = (fro<em>mem> de<em>mem>oClass in <em>mem>ySepcialVariableWhichIsAListOfDe<em>mem>oClass
group de<em>mem>oClass by de<em>mem>oClass.GroupKey
into groupedDe<em>mem>oClass
select groupedD...
class na<em>mem>e and <em>mem>ethod na<em>mem>e dropdown list is <em>mem>issing (visual studio setting)
Does anyone know how to get <em>mem>y class na<em>mem>e and <em>mem>ethod na<em>mem>e dropdown lists again? It's the dropdown lists that are usually above the code. It's just a setting but i can't see<em>mem> to find it. I don't want to reset <em>mem>y setting btw. I shouldn't have to.
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How can I re<em>mem>ove a key and its value fro<em>mem> an associative array?
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You can use unset:
unset($array['key-here']);
Exa<em>mem>ple:
$array = array("key1" =&a<em>mem>p;gt; "value1", "key2" =&a<em>mem>p;gt; "value2");
print_r($array);
unset($array['key1']);
print_r($array);
unset($array['key2']);
print_r($array);
Output:
Array
(
[key1] =&a<em>mem>p;gt; value1
[key2] =&a<em>mem>p;g...
Git push to wrong branch
Working with git, after so<em>mem>e 'co<em>mem><em>mem>it', and a couple of 'push', I realized that a<em>mem> using the wrong branch !
3 Answers
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<em>Mem>ongoDB: update every docu<em>mem>ent on one field
I have a collected na<em>mem>ed foo hypothetically.
4 Answers
4
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