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Rails 4 multiple image or file upload using carrierwave
...nt modify all the attachments at a time. so we will replace attachment one by one, or you can modify as per your rule, Here I just show you how to update any attachment.
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Is Random class thread safe?
...s thread safe in the sense it will still generate random numbers when used by multiple threads.
The Sun/Oracle JVM implementation uses synchronized and AtomicLong as seed to improve consistency across threads. But it doesn't appear to be guarenteed across all platforms in the documentation.
I woul...
Method overloading in Objective-C?
...ompiler automatically doing behind the scenes what one does in Objective-C by giving methods names that are distinct by encompassing (in longer form) the argument types.
– Chris Stratton
Jan 6 '17 at 20:46
...
Get top 1 row of each group
...
;WITH cte AS
(
SELECT *,
ROW_NUMBER() OVER (PARTITION BY DocumentID ORDER BY DateCreated DESC) AS rn
FROM DocumentStatusLogs
)
SELECT *
FROM cte
WHERE rn = 1
If you expect 2 entries per day, then this will arbitrarily pick one. To get both entries for a day, use DENSE_RANK ...
Turn off textarea resizing
... resize: none;
}
You could instead just assign it to a single textarea by name (where the textarea HTML is ):
textarea[name=foo] {
resize: none;
}
Or by id (where the textarea HTML is ):
#foo {
resize: none;
}
Taken from:
http://www.electrictoolbox.com/disable-textarea-resizing-saf...
Extract public/private key from PKCS12 file for later use in SSH-PK-Authentication
...).
First, extract a private key in PEM format which will be used directly by OpenSSH:
openssl pkcs12 -in filename.p12 -clcerts -nodes -nocerts | openssl rsa > ~/.ssh/id_rsa
I strongly suggest to encrypt the private key with password:
openssl pkcs12 -in filename.p12 -clcerts -nodes -nocerts |...
How to make all Objects in AWS S3 bucket public by default?
...into the editor and hit save.
All your items in the bucket will be public by default.
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Counting the number of option tags in a select tag in jQuery
...
The W3C solution:
var len = document.getElementById("input1").length;
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Javascript Object push() function
...
I think this is easier if remove the object if its status is invalid, by doing.
for(var index in data){
if(data[index].Status == "Invalid"){
delete data[index];
}
}
And finally you don't need to create a var temp –
...
What are detached, persistent and transient objects in hibernate?
...esentation in the database and no identifier value is considered transient by Hibernate:
Person person = new Person();
person.setName("Foobar");
// person is in a transient state
A persistent instance has a representation in the database, an identifier value and is associated with a Session. You...