Revision: 4878
http://sourceforge.net/p/vexi/code/4878
Author: mkpg2
Date: 2016-08-07 16:04:12 +0000 (Sun, 07 Aug 2016)
Log Message:
-----------
New method Number.roundSF(). Round to significant figures.
- takes 2 args, optional scale (decimal places) as well. Useful for rounding
monetary values, where sub penny values may be desirable, but never want to
round pennies away.
Modified Paths:
--------------
branches/vexi3/org.vexi-library.js/src/main/java/org/ibex/js/JSNumber.java
branches/vexi3/org.vexi-library.value/meta/module.xml
branches/vexi3/org.vexi-library.value/src/main/java/org/vexi/value/Rational.java
branches/vexi3/org.vexi-library.value/src/test/java/org/vexi/value/TestRational.java
Modified:
branches/vexi3/org.vexi-library.js/src/main/java/org/ibex/js/JSNumber.java
===================================================================
--- branches/vexi3/org.vexi-library.js/src/main/java/org/ibex/js/JSNumber.java
2016-07-21 12:02:46 UTC (rev 4877)
+++ branches/vexi3/org.vexi-library.js/src/main/java/org/ibex/js/JSNumber.java
2016-08-07 16:04:12 UTC (rev 4878)
@@ -108,6 +108,7 @@
String keyStr = JSU.toString(key);
if("format".equals(keyStr)) return typeConst2string(kind());
else if("round".equals(keyStr)) return METHOD;
+ else if("roundSF".equals(keyStr)) return METHOD;
else if("toDecimalString".equals(keyStr)) return METHOD;
return super.get(key);
}
@@ -116,6 +117,11 @@
if("round".equals(keyStr)){
int scale = JSU.getArg_int(args, 0, 0);
return round(scale, RoundingMode.HALF_UP);
+ }else if("roundSF".equals(keyStr)){
+ int sigfigs = JSU.expectArg_int(args, 0);
+ JS scaleJS = JSU.getArg(args, 1);
+ Integer scale = scaleJS==null?null:JSU.toInt(scaleJS);
+ return JSU.N(toRational().roundSF(sigfigs, scale));
}else if("toDecimalString".equals(keyStr)){
if(this instanceof D){
double d = ((D)this).d;
Modified: branches/vexi3/org.vexi-library.value/meta/module.xml
===================================================================
--- branches/vexi3/org.vexi-library.value/meta/module.xml 2016-07-21
12:02:46 UTC (rev 4877)
+++ branches/vexi3/org.vexi-library.value/meta/module.xml 2016-08-07
16:04:12 UTC (rev 4878)
@@ -3,7 +3,7 @@
<artifact name="java.zip" />
<dependencies>
- <system name="java.jre" tag="1.4"/>
+ <system name="java.jre" tag="1.6"/>
<!-- Test dependencies -->
<dependency source="local" org="org.vexi"
name="library.testing" branch="trunk" scope="test"/>
<dependency source="ibiblio" org="junit" name="junit"
tag="3.8.1" scope="test"/>
Modified:
branches/vexi3/org.vexi-library.value/src/main/java/org/vexi/value/Rational.java
===================================================================
---
branches/vexi3/org.vexi-library.value/src/main/java/org/vexi/value/Rational.java
2016-07-21 12:02:46 UTC (rev 4877)
+++
branches/vexi3/org.vexi-library.value/src/main/java/org/vexi/value/Rational.java
2016-08-07 16:04:12 UTC (rev 4878)
@@ -242,6 +242,21 @@
// return valueOf(result);
}
+ private int tenthPower(){
+ return (int)Math.floor(Math.log10(doubleValue()))+1;
+ }
+
+ public Rational roundSF(int significantFigures, Integer scale) {
+ int tenthPower = tenthPower();
+ int scale1 = significantFigures-tenthPower;
+ if(scale!=null){
+ scale1 = Math.max(scale.intValue(), scale1);
+ }
+
+ return valueOf(toBigDecimal(scale1, RoundingMode.HALF_UP));
+ }
+
+
public BigDecimal toBigDecimal(int scale, RoundingMode roundingMode) {
return isInteger() ? new BigDecimal(numerator) : new
BigDecimal(numerator).divide(new BigDecimal(denominator), scale, roundingMode);
}
Modified:
branches/vexi3/org.vexi-library.value/src/test/java/org/vexi/value/TestRational.java
===================================================================
---
branches/vexi3/org.vexi-library.value/src/test/java/org/vexi/value/TestRational.java
2016-07-21 12:02:46 UTC (rev 4877)
+++
branches/vexi3/org.vexi-library.value/src/test/java/org/vexi/value/TestRational.java
2016-08-07 16:04:12 UTC (rev 4878)
@@ -9,6 +9,14 @@
assertEquals(Rational.tryParse("1234.57"),
Rational.valueOf(1234.5678).round(2));
}
+
+ public void testRoundSF() throws ValueException {
+ assertEquals(Rational.tryParse("1234.57"),
Rational.tryParse("1234.5678").roundSF(3,2));
+ assertEquals(Rational.tryParse("1230.00"),
Rational.tryParse("1234.5678").roundSF(3,null));
+ assertEquals(Rational.tryParse("0.0568"),
Rational.tryParse("0.056789").roundSF(3,null));
+ }
+
+
public void testParse() throws ValueException {
assertEquals(Rational.tryParse(".12"), Rational.tryParse("0.12"));
assertEquals(Rational.tryParse("0."), Rational.tryParse("0.0"));
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