log(slicedFruitsWithNegativeIndex); // 输出: ['Cherry', 'Date'] // 省略 end 参数 let slicedFruitsToEnd = fruits.slice(2); console.log(slicedFruitsToEnd); // 输出: ['Cherry', 'Date', 'Elderberry'] 5. 指出slice()方法的返回值及其类型 slice()方法返回一个包含提取元素的新数组。如果...
JavaScript slice() method with negative indexes: Use the negative indexes if you want parse string in reverse order. See the below graphical representation of slice method. JavaScript Slice() Method Negative indexes start from -1 and normal index starts from 0. ...
Usingslice()with negative indexes The following example usesslice()with negative indexes. var str = 'The morning is upon us.'; str.slice(-3); // returns 'us.' str.slice(-3, -1); // returns 'us' str.slice(0, -1); // returns 'The morning is upon us' ...
The start index is inclusive, while the end index is exclusive. If no parameters are provided, it returns a copy of the entire array. Negative indices can be used to indicate positions from the end of the array. The slice method is commonly used when you need to work with a subset of...
Example 2: Using slice() method with negative indices If beginIndex or endIndex are negative, the values are counted from backward. For example, -1 represents the last element, -2 represents the second-to-last element and so on. const str = "JavaScript is a very absurd programming language...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
JavaScript slice method is used to extract a section of an array. The method returns a new array and it does not change the original array.
If greater than the length of the array, actual starting index will be set to the length of the array. If negative, will begin that many elements from the end of the array (with origin -1) and will be set to 0 if absolute value is greater than the length of the array. deleteCount...
What thisstepparameter actually does is allow you to access every Nth element in a sequence. For example,array[::2]gives you the elements with even indices andarray[1::2]gives you the elements with odd ones. A negative value forstepworks the same way except that each successive index decr...