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How to store a command in a variable in a shell script?
...
Be Careful registering an order with the: X=$(Command)
This one is still executed
Even before being called.
To check and confirm this, you cand do:
echo test;
X=$(for ((c=0; c<=5; c++)); do
sleep 2;
done);
echo note the 5 seconds elapsed
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How to intercept click on link in UITextView?
...ith Swift 5 and iOS 12, you can use one of the three following patterns in order to interact with links in a UITextView.
#1. Using UITextView's dataDetectorTypes property.
The simplest way to interact with phone numbers, urls or addresses in a UITextView is to use dataDetectorTypes property. The...
Rename a dictionary key
... old name key; and without iterating through dict key/value?
In case of OrderedDict, do the same, while keeping that key's position.
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Unable to forward search Bash history similarly as with CTRL-r
...suggest box style" filtering of Bash history with (optional) metrics based ordering i.e. it is much more efficient and faster in both forward and backward directions:
It can be easily bound to Ctrl-r and/or Ctrl-s
share
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How do you cast a List of supertypes to a List of subtypes?
...cast(a));
}
}
return listB;
}
This method can be used in order to filter arbitrary lists (not only with a given Subtype-Supertype relationship regarding the type parameters), as in this example:
// A list of type "List<Number>" that actually
// contains Integer, Double and ...
How to retrieve POST query parameters?
... parameter handling (qs) rather than the low-level querystring library. In order to parse repeated parameters with qs, the parameter needs to have brackets: name[]=val1&name[]=val2. It also supports nested maps. In addition to parsing HTML form submissions, the bodyParser can parse JSON requests...
LINQ to SQL Left Outer Join
..., for example:
var query = from c in db.Customers
join o in db.Orders
on c.CustomerID equals o.CustomerID into sr
from x in sr.DefaultIfEmpty()
select new {
CustomerID = c.CustomerID, ContactName = c.ContactName,
OrderI...
Scatter plot and Color mapping in Python
...
Note that the array you pass as c doesn't need to have any particular order or type, i.e. it doesn't need to be sorted or integers as in these examples. The plotting routine will scale the colormap such that the minimum/maximum values in c correspond to the bottom/top of the colormap.
Colorma...
Arduino Sketch upload issue - avrdude: stk500_recv(): programmer is not responding
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FYI - I had to install the latest FTDI drivers in order to resolve this issue permanently
– Scott Silvi
Jun 22 '14 at 17:50
2
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T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...e AS (
SELECT[foo], [bar],
row_number() OVER(PARTITION BY foo, bar ORDER BY baz) AS [rn]
FROM TABLE
)
DELETE cte WHERE [rn] > 1
Play around with it and see what you get.
(Edit: In an attempt to be helpful, someone edited the ORDER BY clause within the CTE. To be clear, you can order ...