NumUtils class - num_utils library

Constructors

NumUtils.new()

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

addDec(num a, num b) → Decimal: 加 (精确相加,防止精度丢失). add (without loosing precision).
addDecString(String a, String b) → Decimal: 两个数相加（防止精度丢失）
addNum(num a, num b) → double: add (without loosing precision). 两个数相加（防止精度丢失）
divideDec(num a, num b) → Decimal: 除 (精确相除,防止精度丢失). divide (without loosing precision).
divideDecString(String a, String b) → Decimal: 除
divideNum(num a, num b) → double: divide (without loosing precision). 两个数相除（防止精度丢失）
getDoubleByValueString(String valueStr, {double defValue = 0}) → double: get double by value str. 数字字符串转double
getIntByValueString(String valueStr, {int defValue = 0}) → int: get int by value string 将数字字符串转int
getNumByValueDouble(double? value, int fractionDigits) → num?: 浮点数字保留x位小数
getNumByValueString(String valueStr, {int? fractionDigits}) → num?: 将数字字符串转num，数字保留x位小数
greaterOrEqual(num a, num b) → bool: Relational greater than or equal operator.
greaterOrEqualDecString(String a, String b) → bool: Relational greater than or equal operator.
greaterThan(num a, num b) → bool: Relational greater than operator. 关系大于运算符。判断a是否大于b
greaterThanDecString(String a, String b) → bool: Relational greater than operator. 判断a是否大于b
isEqual(num a, num b) → bool: Checks if num a EQUAL than num b. 检查num a是否等于num b。
isGreaterThan(num a, num b) → bool: Checks if num a GREATER than num b. 检查num a是否大于num b。
isLowerThan(num a, num b) → bool: Checks if num a LOWER than num b. 检查num a是否小于num b。
isNum(String s) → bool: Checks if string is int or double. 检查字符串是int还是double
isZero(num value) → bool: isZero 判断是否是否是0
lessThan(num a, num b) → bool: Relational less than operator. 关系小于运算符。判断a是否小于b
lessThanDecString(String a, String b) → bool: Relational less than operator. 判断a是否小于b
multiplyDec(num a, num b) → Decimal: 乘 (精确相乘,防止精度丢失). multiply (without loosing precision).
multiplyDecString(String a, String b) → Decimal: 乘
multiplyNum(num a, num b) → double: multiply (without loosing precision). 两个数相乘（防止精度丢失）
remainder(num a, num b) → Decimal: 余数
remainderDecString(String a, String b) → Decimal: 余数
subtractDec(num a, num b) → Decimal: 减 (精确相减,防止精度丢失). subtract (without loosing precision).
subtractDecString(String a, String b) → Decimal: 减
subtractNum(num a, num b) → double: subtract (without loosing precision). 两个数相减（防止精度丢失）
thanOrEqual(num a, num b) → bool: Relational less than or equal operator. 关系小于或等于运算符。判断a是否小于或者等于b
thanOrEqualDecString(String a, String b) → bool: Relational less than or equal operator. 判断a是否小于或者等于b