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Force CloudFront distribution/file update
...Click on Blank Function (custom)
Step 3
Click on empty (stroked) box and select S3 from combo
Step 4
Select your Bucket (same as for CloudFront distribution)
Step 5
Set an Event Type to "Object Created (All)"
Step 6
Set Prefix and Suffix or leave it empty if you don't know what it is.
Step ...
What is the relative performance difference of if/else versus switch statement in Java?
... just ints. From the Java Tutorials: "A switch works with the byte, short, char, and int primitive data types. It also works with enumerated types (discussed in Enum Types), the String class, and a few special classes that wrap certain primitive types: Character, Byte, Short, and Integer (discussed ...
How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
...
Select rows of a matrix that meet a condition
...20, ncol = 4)
colnames(m) <- letters[1:4]
The following command will select the first row of the matrix above.
subset(m, m[,4] == 16)
And this will select the last three.
subset(m, m[,4] > 17)
The result will be a matrix in both cases.
If you want to use column names to select columns...
What are the lesser known but useful data structures?
...s are painfully expensive, given that a pointer is generally longer than a char, which is a shame. They're only suitable for certain data-sets.
– Joe
Jan 29 '10 at 12:06
18
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Select first 4 rows of a data.frame in R
How can I select the first 4 rows of a data.frame :
5 Answers
5
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The type or namespace name 'DbContext' could not be found [closed]
... @Chris Dickinson, right click on the References item in the project and select Add Reference.... Then in the .NET tab, select System.Data.Entity. And if you want to use NuGet, right click on the References item and then select Add Library Package Reference... and in the Online tab, search for Ent...
How to generate a random int in C?
...
If you need secure random characters or integers:
As addressed in how to safely generate random numbers in various programming languages, you'll want to do one of the following:
Use libsodium's randombytes API
Re-implement what you need from libsod...
How do you convert a DataTable into a generic list?
...ataTable
//using lamdaexpression
emp = (from DataRow row in dt.Rows
select new Employee
{
_FirstName = row["FirstName"].ToString(),
_LastName = row["Last_Name"].ToString()
}).ToList();
share
...
Tri-state Check box in HTML?
...lternative would be to play with the checkbox transparency
for the "some selected" state (as Gmail does used to
do in previous versions). It will require some javascript and a CSS
class. Here I put a particular example that handles a list with
checkable items and a checkbox that allows to se...