Direct Date ComparisonĪs the title for this section says, we will take a look at direct date comparison, i.e comparing the Date objects directly. Nothing special, we are creating two dates, both the same date, and then we print that to the console so that we can see what the code outputs.įor each section below I have created a function with a few comparison operators so that we can see how these comparisons work. This is what my file looks like before we start with the comparisons: const dateOne = new Date('') NOTE: You can find the repo for this code here. This article just runs through a few examples. ![]() TLDR: To compare dates you can use the toISOString() or getTime() functions that are build into Date. We will start by looking at dates and how they work when we compare them, and then we will look at toISOString() and getTime(). Working with dates can be a painful experience but comparing them is not too bad as it works the same way as general object comparisons. The properties don't need to be defined in the same order.In this tutorial we will learn how to compare dates with TypeScript or JavaScript. When comparing objects, the property names and values must be the same. Output differentOrder bool = array4 = array1 // returns false because order of elements is different Output assignArray bool = array2 = arra圓 // returns true because one array was defined as equal to the other array Output sameElements bool = array1 = array2 // returns true because arrays are defined with same elements The arrays don't need to be assigned to each other. When comparing arrays, the two arrays must have the same elements and order. Output boolEqual bool = firstBool = secondBool Output stringEqual bool = firstString = secondString Output intEqual bool = firstInt = secondInt Pairs of integers, strings, and booleans are compared. If the operands are different, false is returned. If the operands are equal, true is returned. ) converts the operands to the same type before making the comparison.For relational abstract comparisons (e.g. A strict comparison (e.g., ) is only true if the operands are of the same type and the contents match.The more commonly-used abstract comparison (e.g. The string is true because lowercase letters are less than uppercase letters. JavaScript has both strict and typeconverting comparisons. Output stringLt bool = firstString < secondString If the first value is less than the second value, true is returned. Output stringLtE bool = firstString <= secondStringĮvaluates if the first value is less than the second value. Output intLtE bool = firstInt <= secondInt ExampleĪ pair of integers and pair of strings are compared. ![]() If the first value is less than or equal to the second value, true is returned. NameĮvaluates if the first value is less than or equal to the second value. The e in bend makes the first string greater. Output stringGt bool = firstString > secondString If the first value is greater than the second value, true is returned. Output stringGtE bool = firstString >= secondStringĮvaluates if the first value is greater than the second value. Output intGtE bool = firstInt >= secondInt ![]() If the first value is greater than or equal to the second value, true is returned. OperatorĮvaluates if the first value is greater than or equal to the second value. To run the examples, use Azure CLI or Azure PowerShell to deploy a Bicep file. The comparison operators compare values and return either true or false.
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