NumUtil class
数字工具类
another Fairy
# https://github.com/dart-lang/convert
decimal: ">=1.0.0 <3.0.0"
Constructors
- NumUtil()
Properties
- hashCode → int
-
The hash code for this object.
no setterinherited
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
Methods
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toString(
) → String -
A string representation of this object.
inherited
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
add(
num? a, num? b) → double - 加 (精确相加,防止精度丢失).
-
addDec(
num? a, num? b) → Decimal - 加 (精确相加,防止精度丢失).
-
addDecStr(
String? a, String? b) → Decimal - 加
-
divide(
num? a, num b) → double - 除 (精确相除,防止精度丢失).
-
divideDec(
num? a, num b) → Decimal - 除 (精确相除,防止精度丢失).
-
divideDecStr(
String? a, String b) → Decimal - 除
-
format(
double? value, {int fractionDigits = 0}) → num - 将数字按格式输出
-
formatStr(
double? value, {int fractionDigits = 0}) → String - 将数字按格式输出
-
greaterOrEqual(
num a, num b) → bool -
a是否大于或者等于b -
greaterOrEqualDecStr(
String a, String b) → bool -
a是否大于或者等于b -
greaterThan(
num a, num b) → bool -
a是否大于b -
greaterThanDecStr(
String a, String b) → bool -
a是否大于b -
isZero(
num? value) → bool - 是否为0
-
lessThan(
num a, num b) → bool -
a是否小于b -
lessThanDecStr(
String a, String b) → bool -
a是否小于b -
lessThanOrEqual(
num a, num b) → bool -
a是否小于或者等于b -
lessThanOrEqualDecStr(
String a, String b) → bool -
a是否小于或者等于b -
multiply(
num? a, num? b) → double - 乘 (精确相乘,防止精度丢失).
-
multiplyDec(
num? a, num? b) → Decimal - 乘 (精确相乘,防止精度丢失).
-
multiplyDecStr(
String? a, String? b) → Decimal - 乘
-
parse(
String? valueStr, {int fractionDigits = 0}) → num - 将字符串转换为数字，转换出错抛出异常
-
parseDouble(
String? valueStr, {double? defValue}) → double - 获取int值
-
parseInt(
String? valueStr, {int? defValue}) → int - 获取int值
-
remainder(
num a, num b) → Decimal - 余数
-
remainderDecStr(
String a, String b) → Decimal - 余数
-
subtract(
num? a, num? b) → double - 减 (精确相减,防止精度丢失).
-
subtractDec(
num? a, num? b) → Decimal - 减 (精确相减,防止精度丢失).
-
subtractDecStr(
String? a, String? b) → Decimal - 减
-
tryParse(
String? numStr, {int fractionDigits = 0}) → num - 将字符串转换为数字，转换出错不抛出异常