209

The data itself is called "tramp data". It is a "code smell", indicating that one piece of code is communicating with another piece of code at a distance, through intermediaries. Increases rigidity of code, especially in the call chain. You are much more constrained in how you refactor any method in the call chain. Distributes knowledge about data/methods/...


188

C was never a subset of C++. The most obvious example of this is int new;. This has been true since C89 and C++98, and the languages have only grown further from each other as new standards have come out. Should I stop using the term C/C++ Yes If the answer to #1 is yes, how would I call a program that use a mix of C and C++? A source file is written in ...


139

The term "scalar" comes from linear algebra, where it is used to differentiate a single number from a vector or matrix. The meaning in computing is similar. It distinguishes a single value like an integer or float from a data structure like an array. This distinction is very prominent in Perl, where the $ sigil (which resembles an 's') is used to denote a ...


121

Concurrency and parallelism are two related but distinct concepts. Concurrency means, essentially, that task A and task B both need to happen independently of each other, and A starts running, and then B starts before A is finished. There are various different ways of accomplishing concurrency. One of them is parallelism--having multiple CPUs working on ...


114

The distinguishing feature of "cloud computing" is indeed the way that it is marketed, in particular, the way that it is priced. Another synonym for "cloud computing" that I personally prefer is "utility computing", and that term describes best what it is all about: it is priced and used like any other utility, water, gas, ...


110

The domain is the real-world context in which you're attempting to solve a problem using software. Each domain comes with expertise, vocabulary and tools that are part of that domain. A specific example of a domain could be something like "the automated machining of intricate parts using a high-speed rotating cutter." The software and hardware system that ...


106

They are very generic term actually. There is many way to interpret them, varying in the literature and how people see them. Take everything I say with a huge grain of salt. Usually, an Epic comprise a very global and not very well defined functionality in your software. It is very broad. It will usually be broken down into smaller user story or feature when ...


106

It's most commonly referred to as a bit field, and another term you'll often hear is bit masks, which are used to get or set individual bit values or the entire bit field at once. Many programming languages have auxiliary structures to help with this. As @BernhardHiller notes in the comments, C# has enums with flags; Java has the EnumSet class.


103

Is it because there is no formal input argument? It is because the output depends on something that is not an input, namely the current time. Why is the actual time of day not treated as the "input to the function" Because you didn't pass it as a parameter. If you did pass it in as a parameter, the function would become an identity function on dates, ...


102

I don't think this, in itself, is an anti-pattern. I think the problem is that you are thinking of the functions as a chain when really you should think of each one as an independent black box (NOTE: recursive methods are a notable exception to this advice.) For example, let's say I need to calculate the number of days between two calendar dates so I ...


101

A mask (of the facial variety) is something that covers up some parts of your face and lets other parts show through. The terminology is used by analogy in computing: a bitmask covers up (filters out) some bits in a bitset and allows others to pass. Are there any other type of "masks" besides bit masks in the IT domain? Just off the top of my head, ...


95

You might be thinking of "Idempotent". Idempotence is the property of certain operations in mathematics and computer science, that they can be applied multiple times without changing the result beyond the initial application.


93

Software corruption is the contrary of software integrity. It's the same thing as data corruption, except that the data is the software code. It can affect: the software binary stored in memory: binary codes of software instructions are altered for example because of physical interference (“please switch off electronic devices during take-off and landing”),...


92

According to Wikipedia, Internet Protocol Version 5 was used by the Internet Stream Protocol, an experimental streaming protocol. The second version (of Internet Stream Protocol), known variously as ST-II or ST2, distinguishes its own packets with an Internet Protocol version number 5, although it was never known as IPv5. The Internet Stream ...


83

The downstream services are the ones that consume the upstream service. In particular, they depend on the upstream service. So the front-end is downstream to the back-end because it depends on the back-end. The back-end can exist meaningfully without the front-end, but the front-end doesn't make sense without the back-end. The dependency doesn't have to ...


78

UPDATE: I've revised this answer. A number of good points were raised in the comments that deserved calling out. If my class implements an interface then can I say that I'm following inheritance? It is not entirely clear what you mean by "following inheritance". Let's ask a slightly different question? What is inheritance? When members of one type X ...


63

They're not quite the same. The registers are the places where the values that the CPU is actually working on are located. The CPU design is such that it is only able to actually modify or otherwise act on a value when it is in a register. So registers can work logic, whereas memory (including cache) can only hold values the CPU reads from and writes to. ...


63

This question is not specific to software engineering: it applies to all disciplines working with information. In 1929, the Belgian surrealist painter René Magritte explained it very intuitively in a masterpiece of art called the treachery of images: the painting shows a pipe on a uniform background, and a caption in French "This is not a pipe". It ...


62

BobDalgleish has already noted that this (anti-)pattern is called "tramp data". In my experience, the most common cause of excessive tramp data is having a bunch of linked state variables that should really be encapsulated in an object or a data structure. Sometimes, it may even be necessary to nest a bunch of objects to properly organize the data. For a ...


62

Do not come up with a new word. Your name is perfectly fine: It is unambiguous and specific and consequently leaves no doubt to the reader what you are talking about. By contrast, singleton, unary, 1-tuple or any other term borrowed from mathematics or software engineering carries with it a baggage of preconceptions which are confusing. A list with a single ...


56

A bit mask is used to mask some bits of a bit field while exposing others: initial value: 011011001 bit mask.....: 111110000 result value.: 011010000 This has been used before computing in electronics with logical gates (AND, OR...) or transistors or in electromechanics with relays.


53

Setting a value to true is setting it Setting it to false is clearing it. Changing the current value is toggling it. You can also use "setting it to true" and "setting it to false", of course.


51

The term hotfix is generally used when client has found an issue within the current release of the product and can not wait to be fixed until the next big release. Hence a hotfix issue is created to fix it and is released as a part of update to the current release usually called Cumulative Update(CU). CUs are nothing but a bunch of hotfixes together. Bugfix ...


51

The short answer an instance method knows its instance (and from that, its class) a class method knows its class a static method doesn't know its class or instance The long answer Class methods A class method is one that belongs to the class as a whole. It doesn't require an instance. Instead, the class will automatically be sent as the first argument. A ...


48

A Duck From http://www.codinghorror.com/blog/2012/07/new-programming-jargon.html: A feature added for no other reason than to draw management attention and be removed, thus avoiding unnecessary changes in other aspects of the product.


48

I would like to give you an answer which is directly related to those definitions you found. When one task T1 starts a second task T2, it can happen in the following manner: Synchronous: existing or occurring at the same time. So T2 is guaranteed to be started and executed inside the time slice of T1. T1 "waits" for the ending of T2 and can continue ...


47

Usually this is called a type signature. A type signature includes the function's return type, the number of arguments, the types of arguments, or errors it may pass back.


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