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mongo group query how to keep fields
...t suggestions]
I came here looking for an answer but wasn't happy with the selected answer (especially given it's age). I found this answer that is a better solution (adapted):
db.test.aggregate({
$group: {
_id: '$name',
person: { "$first": "$$ROOT" },
count: { $sum: 1 }
},
{
"$r...
How to delete last character in a string in C#?
...
build it with string.Join instead:
var parameters = sl.SelProds.Select(x=>"productID="+x.prodID).ToArray();
paramstr = string.Join("&", parameters);
string.Join takes a seperator ("&") and and array of strings (parameters), and inserts the seperator between each element of th...
Rails layouts per action?
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If you are only selecting between two layouts, you can use :only:
class ProductsController < ApplicationController
layout "admin", only: [:new, :edit]
end
or
class ProductsController < ApplicationController
layout "applicatio...
How to change SmartGit's licensing option after 30 days of commercial use on ubuntu?
...d just delete that object. Of course only do this if you have accidentally selected commercial and you are genuinely a personal user
– user3265561
Jul 11 '16 at 12:42
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What is a lambda expression in C++11?
...t is not an anonymous function, but capture-less lambdas can be implicitly converted to a function pointer.
p.s.
More about lambda grammar information can be found in Working draft for Programming Language C++ #337, 2012-01-16, 5.1.2. Lambda Expressions, p.88
In C++14 the extra feature which has...
How to get a Static property with Reflection
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This is the best option, in my opinion it should be selected as the answer.
– c0y0teX
Apr 10 '17 at 18:58
8
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PHP date() format when inserting into datetime in MySQL
...FROM_UNIXTIME(1231634282));
Query OK, 1 row affected (0.00 sec)
mysql> select * from a_table;
+---------------------+
| a_date |
+---------------------+
| 2009-01-10 18:38:02 |
+---------------------+
shar...
The source was not found, but some or all event logs could not be searched
...dministrator Rights.
From the Start Menu, right click on Command Prompt, select "Run as administrator".
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How can I do time/hours arithmetic in Google Spreadsheet?
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Google Sheets now have a duration formatting option. Select: Format -> Number -> Duration.
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What is the meaning of symbol $ in jQuery?
... $ already. Just use jQuery.noConflict(). $ is pretty commonly used as a selector function in JS.
In jQuery the $ function does much more than select things though.
You can pass it a selector to get a
collection of matching elements from the DOM.
You can pass
it a function to run when the
d...