This first edition was written for Lua 5.0. While still largely relevant for later versions, there are some differences.
The fourth edition targets Lua 5.3 and is available at Amazon and other bookstores.
By buying the book, you also help to support the Lua project.
The fourth edition targets Lua 5.3 and is available at Amazon and other bookstores.
By buying the book, you also help to support the Lua project.
Programming in Lua |
Part I. The LanguageChapter 5. Functions |
Textual 5 2 5 As A Decimal
5.2 – Variable Number of Arguments
The author of the letter has a strong hope for the future, a version of the traditional Christian hope for the parousia (2:17, 18, 28; 3:2, 3; 4:17), and he has a great interest in the sacraments of the church (2:12, 20, 27; 3:9; 5:1, 6). 'STOPPING BY WOODS ON A SNOWY EVENING' BY ROBERT FROST English 3 - 5.05 This poem carries with it a theme of two worlds. The empty forest, where one can find solitude and take time to watch it fill with snow, and the world of men, obligations, and promises.
![Textual Textual](https://upload.wikimedia.org/wikipedia/commons/thumb/1/1b/Sadko_palekh.jpg/220px-Sadko_palekh.jpg)
Some functions in Lua receive a variable number of arguments.For instance, we have already called
print
with one, two, and more arguments.Suppose now that we want to redefine
print
in Lua:Perhaps our system does not have a stdout
and so,instead of printing its arguments,print
stores them in a global variable,for later use.We can write this new function in Lua as follows:The three dots (..
) in the parameter list indicate thatthe function has a variable number of arguments.When this function is called,all its arguments are collected in a single table,which the function accesses as a hidden parameternamed arg
.Besides those arguments,the arg
table has an extra field, n
,with the actual number of arguments collected.![Kjv Kjv](https://hipertextual.com/files/2020/06/hipertextual-mira-frenetico-primer-gameplay-star-wars-squadrons-2020125066-scaled.jpg)
Sometimes, a function has some fixed parametersplus a variable number of parameters.Let us see an example.When we write a function that returns multiple valuesinto an expression,only its first result is used.However, sometimes we want another result.A typical solution is to use dummy variables;for instance, if we want only the second result from
string.find
,we may write the following code:An alternative solution is to define a select
function,which selects a specific return from a function:Notice that a call to select
has always one fixed argument,the selector,plus a variable number of extra arguments(the returns of a function).To accommodate this fixed argument,a function may have regular parameters before the dots.Then, Lua assigns the first arguments to those parametersand only the extra arguments (if any) go to arg
.To better illustrate this point, assume a definition likeThen, we have the following mapping from arguments to parameters:EditPad Pro is a powerful and versatile text editor or word processor. Designed to make text editing as convenient as possible, using EditPad Pro to edit text files will save you a lot of time and frustration. Learn how you will benefit from using EditPad Pro: What makes EditPad Pro such a great text editor; Edit every kind of text file. Determine or clarify the meaning of unknown and multiple-meaning words and phrases based on grade 5 reading and content, choosing flexibly from a range of strategies. Use context (e.g., cause/effect relationships and comparisons in text) as a clue to the meaning of a word or phrase. The Sound of the Shell 2. Fire on the Mountain 3. Huts on the Beach 4. Painted Faces and Long Hair 5. Beast from Water 6. Beast from Air 7. Shadows and Tall Trees 8. Gift for the Darkness 9. A View to a Death 10. The Shell and the Glasses 11. Cry of the Hunters Notes 4 24 36 44 58 73 84 96 112 120 132.
Using those regular parameters,the definition of
select
is straightforward:Sometimes, a function with a variable number of arguments needs topass them all to another function.All it has to do is to call the other function using
unpack(arg)
as argument:unpack
will return all values in arg
,which will be passed to the other function.A good example of this use is a function towrite formatted text.Lua provides separate functions to format text(string.format
,similar to the sprintf
function from the C library)and to write text (io.write
).Of course, it is easy to combine both functions into a single one,except that this new function has to pass a variable number ofvalues to format
.This is a job for unpack
:Copyright © 2003–2004 Roberto Ierusalimschy. All rights reserved. |
Sequence 2 0 3. The Federalist, commonly referred to as the Federalist Papers, is a series of 85 essays written by Alexander Hamilton, John Jay, and James Madison between October 1787 and May 1788. The essays were published anonymously, under the pen name 'Publius,' in various New York state newspapers of the time.
The Federalist Papers were written and published to urge New Yorkers to ratify the proposed United States Constitution, which was drafted in Philadelphia in the summer of 1787. In lobbying for adoption of the Constitution over the existing Articles of Confederation, the essays explain particular provisions of the Constitution in detail. For this reason, and because Hamilton and Madison were each members of the Constitutional Convention, the Federalist Papers are often used today to help interpret the intentions of those drafting the Constitution.
The Federalist Papers were published primarily in two New York state newspapers: The New York Packet and The Independent Journal. They were reprinted in other newspapers in New York state and in several cities in other states. A bound edition, with revisions and corrections by Hamilton, was published in 1788 by printers J. and A. McLean. An edition published by printer Jacob Gideon in 1818, with revisions and corrections by Madison, was the first to identify each essay by its author's name. Because of its publishing history, the assignment of authorship, numbering, and exact wording may vary with different editions of The Federalist.
Textual 5 2 5 In Cm
The electronic text of The Federalist used here was compiled for Project Gutenberg by scholars who drew on many available versions of the papers. Crax commander 1 8.
One printed edition of the text is The Federalist, edited by Jacob E. Cooke (Middletown, Conn., Wesleyan University Press, 1961). Cooke's introduction provides background information on the printing history of The Federalist; the information provided above comes in part from his work.
Textual 5 2 5 Esv
This web-friendly presentation of the original text of the Federalist Papers (also known as The Federalist) was obtained from the e-text archives of Project Gutenberg. Any irregularities with regard to grammar, syntax, spelling, or punctuation are as they exist in the original e-text archives.