// Create a two date objectsconstfirstDate=newDate('2024-01-07')constsecondDate=newDate('2023-11-09')// Look for comparison among the trio using the comparison operatorsconsole.log(firstDate<secondDate)// false (firstDate is later than secondDate)console.log(firstDate>secondDate)// true ...
!=not equal !==not equal value or not equal type >greater than <less than >=greater than or equal to <=less than or equal to ?ternary operator Note Comparison operators are fully described in theJS Comparisonschapter. JavaScript String Comparison ...
OperatorDescriptionComparingReturnsTry it == equal to x == 8 false Try it » x == 5 true Try it » x == "5" true Try it » === equal value and equal type x === 5 true Try it » x === "5" false Try it » != not equal x != 8 true Try it »...
校准涉及将设备进行的测量结果与已知标准进行比较,以确保准确性和可靠性。 constfirstDate =newDate('2023-02-06');constsecondDate =newDate('2022-02-06');// This might not always be true due to time informationif(firstDate === secondDate) {// Dates are not necessarily equal} 结束语 在本教...
x === .1 // => false: .3-.2 is not equal to .1 y === .1 // => true: .2-.1 is equal to .1 由于四舍五入误差,.3 和 .2 的近似值之间的差异并不完全等同于 .2 和 .1 的近似值之间的差异。重要的是要理解这个问题并不特定于 JavaScript:它影响任何使用二进制浮点数的编程语言。
equal [ˈikwəl] 相等的 注意: (=>) 不是运算符,而是箭头函数的标记符号 。 全等和等于的区别: ² 全等“===”运算符比较过程: 只有两个值类型相同并且值也相同的时候,它们才相等。 如果两个引用值指向同一个对象、数组或函数,则它们是相等的。如果指向不同的对象,则它们是不等的,尽管两个对象具有...
0:000> dx @$myScript = Debugger.State.Scripts.comparisonWith64BitValues.Contents 首先进行测试,我们将使用 (2^53) - 2,看看它是否返回预期值。dbgcmd 复制 0:001> dx @$myScript.comparisonWith64BitValues(9007199254740990, 9007199254740990) areEqual >> true areNotEqual >> false isEqualTo42 >>...
As it turns out, there is a straightforward way to decide which one to use. And the same logic works for inequality comparison operators!==and!=as well. Compare equal and of same type with === x === y The triple equals operator (===) returns true if both operands are of the same...
compareTo(str:string) :int ParametersDescription strThe comparison string. ReturnsDescription int0 if the two strings are equal. Usage String 1 is this object. String 2 is the parameter. If the two strings are equal, the return value is 0. If the strings are not equal, the return value ...
If the strings are not equal, the first statement following the conditional statement block is processed. If an if...else conditional statement is used, the block of code following the else keyword is the one that’s processed: if (strName == "Shelley") { alert("Your name is Shelley!