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Using Rails serialize to save hash to database
...PDATED:
Exact implementation will depend on your database, but PostgreSQL now has json and jsonb columns which can natively store your hash/object data and allow you to query against the JSON with ActiveRecord!
change your migration and you're done.
class Migration0001
def change
add_column...
Unable to execute dex: method ID not in [0, 0xffff]: 65536
...nt library for GCM, because I am using only gcm service from play service, now it fixed my problem with this. Thanks! to save my time.
– Ankit
Aug 25 '16 at 10:51
add a commen...
Length of string in bash
...}
LANG=$oLang LC_ALL=$oLcAll
return $(( bytlen - ${#1} ))
}
Then now:
for string in Généralités Language Théorème Février "Left: ←" "Yin Yang ☯";do
strU8DiffLen "$string"
printf " - %-$((14+$?))s is %2d chars length, but uses %2d bytes\n" \
"'$string'" ${#string...
Method chaining - why is it a good practice, or not?
...
I know what you mean, Vilx. But yet when I read list.add(someItem), I read that as "this code is adding someItem to the list object". so when I read PizzaBuilder.AddSauce(), I read this naturally as "this code is adding sauce to...
How to adjust text font size to fit textview
...tion! In case anyone else is new to android development and doesn't quite know how to implement an extended view in XML, it looks like this: <com.example.zengame1.FontFitTextView android:paddingTop="5dip" android:id="@+id/childs_name" android:layout_width="fill_parent" ...
When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
... I use MySQL (or SQLite for testing).
If you need a NoSQL db you usually know about it, possible reasons are:
client wants 99.999% availability on
a high traffic site.
your data makes
no sense in SQL, you find yourself
doing multiple JOIN queries for
accessing some piece of information.
you are b...
How to find the lowest common ancestor of two nodes in any binary tree?
...e for your other node in question, resulting in (steps not shown): {1, 2}
Now compare the two lists you made looking for the first element where the list differ, or the last element of one of the lists, whichever comes first.
This algorithm requires O(h) time where h is the height of the tree. In ...
How do I make a reference to a figure in markdown using pandoc?
.... an extension to pandoc markdown syntax to allow identifiers for pictures now finally is under way. stay tuned :)
– Susanne Oberhauser
Dec 8 '14 at 15:37
...
COUNT DISTINCT with CONDITIONS
... The edited query still does not solve the problem - isn't this now working on distinct entryId values rather than distinct tags?
– BrianC
Dec 27 '12 at 1:08
...
Find and replace - Add carriage return OR Newline
...es" then modify that dialogs scope, the shortcut default is f# interactive now.
– Mark Schultheiss
Apr 28 '17 at 17:36
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