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How to find Unused Amazon EC2 Security groups
...AWS CLI tool, I found an easy way to get what I need:
First, get a list of all security groups
aws ec2 describe-security-groups --query 'SecurityGroups[*].GroupId' --output text | tr '\t' '\n'
Then get all security groups tied to an instance, then piped to sort then uniq:
aws ec2 describe-instance...
Full Screen DialogFragment in Android
...
finally sort out, thansk for suggestion @David
– Ashu Kumar
Jan 8 '16 at 5:56
1
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How to display count of notifications in app launcher icon [duplicate]
...("vanilla" android without custom launchers and touch interfaces) does not allow changing of the application icon, because it is sealed in the .apk tightly once the program is compiled. There is no way to change it to a 'drawable' programmatically using standard APIs. You may achieve your goal by us...
test a file upload using rspec - rails
...
You can use fixture_file_upload method to test file uploading:
Put your test file in "{Rails.root}/spec/fixtures/files" directory
before :each do
@file = fixture_file_upload('files/test_lic.xml', 'text/xml')
end
it "can upload a license" do...
Best database field type for a URL
...er is subject to the maximum row size (65,535 bytes, which is shared among all columns) and the character set used.
So ...
< MySQL 5.0.3 use TEXT
or
>= MySQL 5.0.3 use VARCHAR(2083)
share
|
...
SQLite table constraint - unique on multiple columns
...t method, and not the insertWithOnConflict with the SQLiteDatabase.CONFLICT_REPLACE flag?
– Oleg Belousov
Jan 25 '14 at 16:23
3
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Necessary to add link tag for favicon.ico?
Are there any modern browsers that won't detect the favicon.ico automatically? Is there any reason to add the link tag for favicon.ico?
...
How to distinguish between left and right mouse click with jQuery
... Keep scrolling down and make sure to read @JeffHines's answer. Basically, jQuery has this built-in as the event 'contextmenu'.
– jpadvo
Dec 17 '11 at 20:30
...
Are there benefits of passing by pointer over passing by reference in C++?
...ect", then use a pointer instead of a reference.
Also, passing by pointer allows you to explicitly see at the call site whether the object is passed by value or by reference:
// Is mySprite passed by value or by reference? You can't tell
// without looking at the definition of func()
func(mySpri...
@UniqueConstraint and @Column(unique = true) in hibernate annotation
... The same aplies for group.
On the other hand,
@Table(
name = "product_serial_group_mask",
uniqueConstraints = {@UniqueConstraint(columnNames = {"mask", "group"})}
)
Implies that the values of mask + group combined should be unique. That means you can have, for example, a record with mask...