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Diffstat (limited to 'ext/bigdecimal/bigdecimal_en.html')
| -rw-r--r-- | ext/bigdecimal/bigdecimal_en.html | 47 |
1 files changed, 11 insertions, 36 deletions
diff --git a/ext/bigdecimal/bigdecimal_en.html b/ext/bigdecimal/bigdecimal_en.html index d37d13616f..1197be15b9 100644 --- a/ext/bigdecimal/bigdecimal_en.html +++ b/ext/bigdecimal/bigdecimal_en.html @@ -1,3 +1,4 @@ +<!-- saved from url=(0022)http://internet.e-mail --> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html"> @@ -105,7 +106,8 @@ For details,see the util.rb code. a=BigDecimal::new(s[,n]) or<BR> a=BigDecimal(s[,n]) or<BR> where:<BR> -s: Initial value string.<BR> +s: Initial value string. Spaces will be ignored. Any unrecognizable character for +representing initial value terminates the string.<BR> n: Maximum number of significant digits of a. n must be a Fixnum object. If n is omitted or is equal to 0,then the maximum number of significant digits of a is determined from the length of s. Actual number of digits handled in computations are usually gretaer than n.<BR> @@ -373,6 +375,14 @@ n can be an string representing a positive integer number. <CODE><PRE> BigDecimal("0.1234567890123456789").to_s("10") # ==> "0.1234567890 123456789E0" </PRE></CODE> +If the first character is '+'(or ' '),then '+'(or ' ') will be set before value string +when the value is positive. +<CODE><PRE> +BigDecimal("0.1234567890123456789").to_s(" 10") # ==> " 0.1234567890 123456789E0" +BigDecimal("0.1234567890123456789").to_s("+10") # ==> "+0.1234567890 123456789E0" +BigDecimal("-0.1234567890123456789").to_s("10") # ==> "-0.1234567890 123456789E0" +</PRE></CODE> + At the end of the string,'E'(or 'e') or 'F'(or 'f') can be specified to change number representation. <CODE><PRE> @@ -501,42 +511,7 @@ same as ==,used in case statement. <LI>>=</LI> </UL> -<H4><U>Class methods(trial version)</U></H4> -Following class methods are in trial stage, and not usable in default. -Uncomment /* #define ENABLE_TRIAL_METHOD */ in bigdecimal.c, compile and install -again if you want to use. -<UL> -<LI><B>E</B></LI><BLOCKQUOTE> -e = BigDecimal::E(n)<BR> -where e(=2.718281828....) is the base value of natural logarithm.<BR> -n specifies the length of significant digits of e. - -</BLOCKQUOTE> -<LI><B>PI</B></LI><BLOCKQUOTE> -e = BigDecimal::PI(n)<BR> -returns at least n digits of the ratio of the circumference of a circle to its diameter -(pi=3.14159265358979....) using J.Machin's formula.<BR> -</BLOCKQUOTE> -</UL> - -<H4><U>Instance methods(trial version)</U></H4> -Following instance methods are in trial stage, and not usable in default. -Uncomment /* #define ENABLE_TRIAL_METHOD */ in bigdecimal.c, compile and install -again if you want to use. -<UL> -<LI><B>sincos</B></LI><BLOCKQUOTE> -computes and returns sine and cosine value of a with significant digit number n at least.<BR> -sin,cos = a.sincos(n)<BR> -Computation may return bad results unless |a|<2*3.1415..... -</BLOCKQUOTE> -<LI><B>exp</B></LI><BLOCKQUOTE> -c = a.exp(n)<BR> -computes the base of natural logarithm value(e=2.718281828....) powered by a -with significant digit number n at least.<BR> -</BLOCKQUOTE> -</UL> <HR> - <H3>About 'coerce'</H3> <B>For the binary operation like A op B:</B> <DL> |