Which of the following most closely resembles the situation shown in this cartoon?

Microsoft has responded to a list of concerns regarding its ongoing $68bn attempt to buy Activision Blizzard, as raised by the UK's Competition and Markets Authority (CMA), and come up with an interesting statistic.

In response to continued questions over whether Microsoft owning Call of Duty would unfairly hobble PlayStation, Microsoft claimed that every COD player on PlayStation could move over to Xbox, and Sony's playerbase would still remain "significantly larger" than its own.

Microsoft does not go into detail on its mental arithmetic here, but does note elswhere in its comments that PlayStation currently has a console install base of 150 million, compared to Xbox's install base of 63.7 million.

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That claim is part of a range of comments given to Eurogamer sister site GamesIndustry.biz in response to the CMA's latest report, which otherwise mostly repeats many of the same concerns raised by the UK regulator - and others around the world - already.

For those following the case, the CMA's latest intervention will not come as a surprise - it is the next step on the regulator's recent roadmap for how and when it will weigh in with its final ruling. This month, we were due the CMA's October "issues statement" - and it seems that this is the document to which Microsoft has now publicly responded.

The usual topics are covered - surrounding the potential for the deal to harm competitors should Microsoft gain too much of an advantage owning Activision Blizzard franchises (mainly, Call of Duty) and therefore being able to leverage their brand power to become a dominant market leader in the console market and cloud streaming.

Specifically, the CMA sees potential for the deal to harm Sony but also other streaming services such as Google (perhaps a moot point now), Amazon and Nvidia.

"Having full control over this powerful catalogue, especially in light of Microsoft's already strong position in gaming consoles, operating systems, and cloud infrastructure, could result in Microsoft harming consumers by impairing Sony's – Microsoft's closest gaming rival – ability to compete," the CMA wrote, "as well as that of other existing rivals and potential new entrants who could otherwise bring healthy competition through innovative multi-game subscriptions and cloud gaming services."

In response, Microsoft said such "unsupported theories of harm" were not enough to even warrant the CMA's current Phase 2 investigation - which was triggered on 1st September.

"The suggestion that the incumbent market leader, with clear and enduring market power, could be foreclosed by the third largest provider as a result of losing access to one title is not credible," Microsoft told GamesIndustry.biz.

"While Sony may not welcome increased competition, it has the ability to adapt and compete. Gamers will ultimately benefit from this increased competition and choice.

"Should any consumers decide to switch from a gaming platform that does not give them a choice as to how to pay for new games (PlayStation) to one that does (Xbox), then that is the sort of consumer switching behavior that the CMA should consider welfare enhancing and indeed encourage. It is not something that the CMA should be trying to prevent."

The CMA is due to notify Microsoft of its provisional findings in January 2023, at which point it can seek possible remedies to any sticking points raised. The regulator's final report - and overall ruling - will then be published no later than 1st March next year.

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Formally, a string is a finite, ordered sequence of characters such as letters, digits or spaces. The empty string is the special case where the sequence has length zero, so there are no symbols in the string. There is only one empty string, because two strings are only different if they have different lengths or a different sequence of symbols. In formal treatments, the empty string is denoted with ε or sometimes Λ or λ.

The empty string should not be confused with the empty language ∅, which is a formal language (i.e. a set of strings) that contains no strings, not even the empty string.

The empty string has several properties:

In context-free grammars, a production rule that allows a symbol to produce the empty string is known as an ε-production, and the symbol is said to be "nullable".

Use in programming languages[edit]

In most programming languages, strings are a data type. Strings are typically stored at distinct memory addresses (locations). Thus, the same string (for example, the empty string) may be stored in two or more places in memory.

In this way, there could be multiple empty strings in memory, in contrast with the formal theory definition, for which there is only one possible empty string. However, a string comparison function would indicate that all of these empty strings are equal to each other.

Even a string of length zero can require memory to store it, depending on the format being used. In most programming languages, the empty string is distinct from a null reference (or null pointer) because a null reference points to no string at all, not even the empty string. The empty string is a legitimate string, upon which most string operations should work. Some languages treat some or all of the following in similar ways: empty strings, null references, the integer 0, the floating point number 0, the Boolean value false, the ASCII character NUL, or other such values.

The empty string is usually represented similarly to other strings. In implementations with string terminating character (null-terminated strings or plain text lines), the empty string is indicated by the immediate use of this terminating character.

Examples of empty strings[edit]

The empty string is a syntactically valid representation of zero in positional notation (in any base), which does not contain leading zeros. Since the empty string does not have a standard visual representation outside of formal language theory, the number zero is traditionally represented by a single decimal digit 0 instead.

Zero-filled memory area, interpreted as a null-terminated string, is an empty string.

Empty lines of text show the empty string. This can occur from two consecutive EOLs, as often occur in text files, and this is sometimes used in text processing to separate paragraphs, e.g. in MediaWiki.

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