mirrors/lua
0
0
Fork 0
mirror of https://github.com/lua/lua.git synced 2024-11-27 12:13:38 +08:00
Code Issues Packages Projects Releases Wiki Activity

some corrections + angles in radians

Browse Source
This commit is contained in:
Roberto Ierusalimschy 2002-08-14 17:07:25 -03:00
parent 94b5ad31f4
commit 82a3be0671
1 changed files with 29 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
manual.tex
View File

@ -1,7 +1,7 @@
% $Id: manual.tex,v 1.60 2002/08/13 19:44:47 roberto Exp roberto $ % $Id: manual.tex,v 1.61 2002/08/13 20:00:51 roberto Exp roberto $
%{[( %{[(
\documentclass[11pt,twoside,draft]{article} \documentclass[11pt,twoside]{article}
\usepackage{fullpage} \usepackage{fullpage}
\usepackage{bnf} \usepackage{bnf}
\usepackage{graphicx} \usepackage{graphicx}
@ -134,7 +134,7 @@ Waldemar Celes
\tecgraf\ --- Computer Science Department --- PUC-Rio \tecgraf\ --- Computer Science Department --- PUC-Rio
} }
%\date{{\small \tt\$Date: 2002/08/13 19:44:47 $ $}} %\date{{\small \tt\$Date: 2002/08/13 20:00:51 $ $}}
\maketitle \maketitle
@ -3138,7 +3138,7 @@ from the end of the string.
Thus, the last character is at position \Math{-1}, and so on. Thus, the last character is at position \Math{-1}, and so on.
The string library provides all its functions inside the table The string library provides all its functions inside the table
\DefLIB{string}. \IndexLIB{string}.
\subsubsection*{\ff \T{string.byte (s [, i])}}\DefLIB{string.byte} \subsubsection*{\ff \T{string.byte (s [, i])}}\DefLIB{string.byte}
Returns the internal numerical code of the \M{i}-th character of \verb|s|. Returns the internal numerical code of the \M{i}-th character of \verb|s|.
@ -3422,7 +3422,7 @@ A pattern cannot contain embedded zeros. Use \verb|%z| instead.
\subsection{Table Manipulation} \subsection{Table Manipulation}
This library provides generic functions for table manipulation, This library provides generic functions for table manipulation,
It provides all its functions inside the table \DefLIB{table}. It provides all its functions inside the table \IndexLIB{table}.
Most functions in the table library library assume that the table Most functions in the table library library assume that the table
represents an array or a list. represents an array or a list.
@ -3559,10 +3559,8 @@ The library provides the following functions:
\end{verbatim} \end{verbatim}
plus a variable \IndexLIB{math.pi}. plus a variable \IndexLIB{math.pi}.
Most of them Most of them
are only interfaces to the homonymous functions in the C~library, are only interfaces to the homonymous functions in the C~library.
except that, for the trigonometric functions, The functions \verb|math.deg| and \verb|math.rad| convert
all angles are expressed in \emph{degrees}, not radians.
The functions \verb|math.deg| and \verb|math.rad| can be used to convert
between radians and degrees. between radians and degrees.
The function \verb|math.max| returns the maximum The function \verb|math.max| returns the maximum
@ -3593,14 +3591,14 @@ and all input/output operations are over those default files.
The second style uses explicit file descriptors. The second style uses explicit file descriptors.
When using implicit file descriptors, When using implicit file descriptors,
all operations are supplied by table \DefLIB{io}. all operations are supplied by table \IndexLIB{io}.
When using explicit file descriptors, When using explicit file descriptors,
the operation \DefLIB{io.open} returns a file descriptor, the operation \IndexLIB{io.open} returns a file descriptor,
and then all operations are supplied as methods by the file descriptor. and then all operations are supplied as methods by the file descriptor.
Moreover, the table \verb|io| also provides Moreover, the table \verb|io| also provides
three predefined file descriptors: three predefined file descriptors:
\DefLIB{io.stdin}, \DefLIB{io.stdout}, and \DefLIB{io.stderr}, \IndexLIB{io.stdin}, \IndexLIB{io.stdout}, and \IndexLIB{io.stderr},
with their usual meaning from C. with their usual meaning from C.
A file handle is a userdata containing the file stream (\verb|FILE*|), A file handle is a userdata containing the file stream (\verb|FILE*|),
@ -3613,7 +3611,8 @@ and some value different from \nil{} on success.
\subsubsection*{\ff \T{io.close ([handle])}}\DefLIB{io.close} \subsubsection*{\ff \T{io.close ([handle])}}\DefLIB{io.close}
Equivalent to \verb|fh:close| over the default output file. Equivalent to \verb|handle:close()|.
Without a \verb|handle|, closes the default output file.
\subsubsection*{\ff \T{io.flush ()}}\DefLIB{io.flush} \subsubsection*{\ff \T{io.flush ()}}\DefLIB{io.flush}
@ -3746,7 +3745,7 @@ plus a string describing the error.
\subsection{Operating System Facilities} \label{libiosys} \subsection{Operating System Facilities} \label{libiosys}
This library is implemented through table \DefLIB{os}. This library is implemented through table \IndexLIB{os}.
\subsubsection*{\ff \T{os.clock ()}}\DefLIB{os.clock} \subsubsection*{\ff \T{os.clock ()}}\DefLIB{os.clock}
@ -4120,6 +4119,11 @@ The precedence of \rwd{or} is smaller than the precedence of \rwd{and}.
\item \item
\rwd{in} is a reserved word. \rwd{in} is a reserved word.
\item
The old construction \verb|for k,v in t|, where \verb|t| is a table,
is deprecated (although it is still supported).
Use \verb|for k,v in pairs(t)| instead.
\item \item
When a literal string of the form \verb|[[...]]| starts with a newline, When a literal string of the form \verb|[[...]]| starts with a newline,
this newline is ignored. this newline is ignored.
@ -4137,6 +4141,17 @@ Most library functions now are defined inside tables.
There is a compatibility script (\verb|compat.lua|) that There is a compatibility script (\verb|compat.lua|) that
redefine most of them as global names. redefine most of them as global names.
\item
In the math library, angles are expressed in radians.
With the compatibility script (\verb|compat.lua|),
functions still work in degrees.
\item
The \verb|call| function is deprecated.
Use \verb|f(unpack(tab))| instead of \verb|call(f, tab)|
for unprotected calls,
or the new \verb|pcall| function for protected calls.
\item \item
\verb|dofile| do not handle errors, but simply propagate them. \verb|dofile| do not handle errors, but simply propagate them.