precision (also called positive predictive value) is the fraction of retrieved instances that are relevant, while recall (also known as sensitivity) is the fraction of relevant instances that are retrieved.
Category Archives: Techniques
stop words
In computing, stop words are words which are filtered out before or after processing of natural language data (text).[1] There is not one definite list of stop words which all tools use and such a filter is not always used. Some tools specifically avoid removing them to support phrase search.
Any group of words can be chosen as the stop words for a given purpose. For some search engines, these are some of the most common, short function words, such as the, is, at, which, and on. In this case, stop words can cause problems when searching for phrases that include them, particularly in names such as ‘The Who’, ‘The The’, or ‘Take That’. Other search engines remove some of the most common words—including lexical words, such as “want”—from a query in order to improve performance
bug bash
In software development, a bug bash is a procedure where all the developers, testers, program managers, usability researchers, designers, documentation folks, and even sometimes marketing people, put aside their regular day-to-day duties and “pound on the product”—that is, each exercises the product in every way they can think of. Because each person will use the product in slightly different (or very different) ways, and the product is getting a great deal of use in a short amount of time, this approach may reveal bugs relatively quickly.
canonical URL
hashtag
(on social media sites such as Twitter) a word or phrase preceded by a hash or pound sign (#) and used to identify messages on a specific topic.
the hash or pound sign (#).
e.g. #tasks
MVP
A minimum viable product has just those core features that allow the product to be deployed, and no more. The product is typically deployed to a subset of possible customers, such as early adopters that are thought to be more forgiving, more likely to give feedback, and able to grasp a product vision from an early prototype or marketing information. It is a strategy targeted at avoiding building products that customers do not want, that seeks to maximize the information learned about the customer per dollar spent. “The minimum viable product is that version of a new product which allows a team to collect the maximum amount of validated learning about customers with the least effort.”[3] The definition’s use of the words maximum and minimum means it is decidedly not formulaic. It requires judgment to figure out, for any given context, what MVP makes sense.
An MVP is not a minimal product,[4] it is a strategy and process directed toward making and selling a product to customers. It is an iterative process of idea generation, prototyping, presentation, data collection, analysis and learning. One seeks to minimize the total time spent on an iteration. The process is iterated until a desirable product/market fit is obtained, or until the product is deemed to be non-viable.
IRC bot
An IRC bot is a set of scripts or an independent program that connects to Internet Relay Chat as a client, and so appears to other IRC users as another user. An IRC bot differs from a regular client in that instead of providing interactive access to IRC for a human user, it performs automated functions.
post without rich text formatting
cmd+shift+v for posting without the formatting
android
android is an operating system.
R.java global file for all activities
start emulator: project->run as Android or window->android
androidmanifest : meta data for the app; it has entry point that you can set up.
each activity is a screen
hello_activity.java file: transfer from screen to screen: button.setOnClickListener() {
public onClick() { Intent intent = new Intent(currActivity, nextActivity); startActivity(intent); }
}
button tag is created in the activity_hello.xml file, which is the layout
layout : view
all the string variable is defined string.xml
R.java is an automatically generated file from the variables defined string.xml or other variables
extra
push and pull
difference with email as example https://motorola-global-eng.custhelp.com/app/answers/detail/a_id/15859/~/what-is-the-difference-between-push-and-pull-email%3F
sns: server push message to client whenever the message is available
sqs: client pull messages from server; server sends out the message only when the client requests.
interesting topic: implement reliable push mechanism
MyRubyLearning 