Facebook Custom Audiences approximate_count value is too low [duplicate] - facebook

This question already has answers here:
Is there any way to get a list of users for a custom audience?
(2 answers)
Closed 8 years ago.
I finished uploading users into audiences and everything went smoothly, no error received. I checked the audiences and approximate_count shows only a small fraction of the number of uploaded users.
How is it possible? How is this number calculated?
Thanks for the help!

From what I know and from the documentation isn't really possible at the moment.
Which logic stands behind is obscure to me and, frankly, uncomprehensible that one can only obtain an "aproximate" number of users in an audience.
You should apply you own logic and data keeping beyond that.

Related

Still no way to increase the YouTube Analytics API Quota?

I am looking for a way to increase the queries per day quota for the YouTube Analytics API. I was able to find this question asking the same thing nearly two years ago now - can anyone confirm if the answer is still the same (that there is no way anymore)?

Data for calculating Vellocity Chart in Rally [duplicate]

This question already has an answer here:
Velocity Chart in Rally [closed]
(1 answer)
Closed 9 years ago.
I was working on a project to pull out data from rally and create a vellocity chart.
I understand the REST Web Service APIs to use are Defects, Iteration,Hierarchical requirement and Iterationcumilativeflow data.
But can you please tell me how the actual calcualtions are done to calculate the velocity per iteration for a particular project.
What all data are required and how it can be achieved. Right now im able to pull planestimate of all accepted user stories and total plan estimate.
Seems to be a duplicate of Velocity Chart in Rally.
In that post I answered: "I wrote an app recently to calculate velocity. I used the story points of all accepted stories/defects in a time period (iteration/release). My numbers ended up matching what Rally had for my velocity, so I believe that is all it takes."

Technology behind the Facebook Search [closed]

Closed. This question needs to be more focused. It is not currently accepting answers.
Want to improve this question? Update the question so it focuses on one problem only by editing this post.
Closed 7 years ago.
Improve this question
If you just start typing a person name in the Facebook search box(displayed in blue upper bar on your profile) then suddenly within a fraction of a second search results appear and they comes much more faster if that person already exist in your profile.
so i just want to know that what is behind this search.i mean to say that which software tool and algorithm they are using for it.
i know that no one other than Facebook can explain exactly about it thats why i am just asking to give me an idea about that.
i am sure that they are using something which is open source.
The response is an autocomplete Ajax form, but this is not really the question. The key question here is how fast can you search in a text field. Facebook splits this into 2 parts. First they search in the list of your friend which is a cached and relatively rarely changed file containing 100 to a 1000 entries. This is quite fast. The other thing is to search for a name in ALL Facebook, which means I guess 1 billion names. This is a little more tricky, but I guess they have them splitted and indexed by letters or letters combinations. For example:
// search query Alice Cooper
A ... they give you a list of A like names Alina, Ana, Alice...
Al .... they limit it to Alicia, Alice, Alina ...
// and so on
Probably after a 3 letters they are starting to do a search, but not in the 1 billion rows, but in a limited subset of your 3rd level friends and probably increasing it each time.
Probably your query is never compared with the whole table, and there are definitely cached levels or recalculated queries for most of the common names.
This is in terms of technique. In terms of technology take a look at Solandra, a search engine build on top of Cassandra which Facebook is using, though I cannot confirm that this is what they are using, but just to give you a research direction.
I assume the underlying technology is AJAX, with some caching mechanism that increases performance for profiles in your friends list.

Parsing several Internet pages simultaneously [duplicate]

This question already has answers here:
Perl, how to fetch data from urls in parallel?
(4 answers)
Closed 8 years ago.
There is a list of (unrelated) Internet pages I'd like to load simultaneously.
I wouldn't mind parsing the information itself page after page, but I thought to myself, that if my browser can load two and more pages simultaneously, why shouldn't Perl do that?
I'm afraid I couldn't find anything like that on the Internet, so I am asking you.
Thank you in advance.
Parallel::ForkManager is your friend. Tell it how many you want to do simultaneously and loop through your list.

How to access Signal strength in iPhone for Jailbreak [duplicate]

This question already has answers here:
Closed 11 years ago.
I am working on an iPhone project related "Create call log with Signal Strength". So we must get required RXQual, RXlevel, FER, C/I values. This app will support for jailbreak.
But I am unable to get any information to access these exact values. I can't go ahead without these values & unable to deliver the project to Clients.
Please suggest & guide me, How can I access these values. Its very urgent.
Can you suggest me the private API's for getting access the signal strength values?
I see you've included the tag "jailbreak", so I imagine that the use of only public apis is a non-issue for you. But for future people coming to this question, there is no way at all to get these values through public (i.e. app-store-legal) methods.