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How do I query using fields inside the new PostgreSQL JSON datatype?
...rds in JSON datatype
For bigger tables you may want to add an expression index to increase performance:
Index for finding an element in a JSON array
Postgres 9.4
Adds jsonb (b for "binary", values are stored as native Postgres types) and yet more functionality for both types. In addition to e...
Format a Go string without printing?
... edited Feb 21 '19 at 12:07
ndequeker
6,92366 gold badges5353 silver badges8585 bronze badges
answered Jun 20 '12 at 16:43
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Simple (non-secure) hash function for JavaScript? [duplicate]
....hashCode(), and receive a numerical hash code (more specifically, a Java equivalent) such as 1395333309.
String.prototype.hashCode = function() {
var hash = 0;
if (this.length == 0) {
return hash;
}
for (var i = 0; i < this.length; i++) {
var char = this.charCod...
What is Delegate? [closed]
...
One question related to your answer. How is it really different from calling a function in normal way? Just because of that it is not known at runtime ?
– Naveed
Jan 11 '10 at 19:51
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AWS MySQL RDS vs AWS DynamoDB [closed]
...ed the flexibility to query the data in a number of different ways (adding indexes as necessary of course), then RDS might be a better solution.
The main benefit for using DynamoDB as a NoSQL store is that you get guaranteed read/write throughput at whatever level you require without having to worr...
How to pass arguments into a Rake task with environment in Rails? [duplicate]
...s]
Original Answer
When you pass in arguments to rake tasks, you can require the environment using the :needs option. For example:
desc "Testing environment and variables"
task :hello, :message, :needs => :environment do |t, args|
args.with_defaults(:message => "Thanks for logging on")...
CSS selector with period in ID
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Classic. Just after digging through all the specs writing the question, I read through it some more and found there is an escape character. I've never needed it before, but the CSS spec does allow for backslash (\) escaping like most languages. What do you know?
So in my example, the f...
How can I find the last element in a List?
...... making it a very poor solution if the IList is a LinkedList, since the indexer will just go through the entire list needlessly (I haven't found an override iterating backwards on Item[] with index > Count/2 in the c# sources, YMMV)
– user719662
Jan 2 '16...
How to step through Python code to help debug issues?
...… with “n” (next)
Repeating the last debugging command… with ENTER
Quitting it all… with “q” (quit)
Printing the value of variables… with “p” (print)
a) p a
Turning off the (Pdb) prompt… with “c” (continue)
Seeing where you are… with “l” (list)
Stepping into subrout...
How to change the pop-up position of the jQuery DatePicker control
... This may work to set margins, but fails for "left", "top", "z-index", and "position" attributes.
– aaronbauman
Mar 18 '14 at 21:58
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