findIndex is not a function 这个错误通常出现在尝试在一个不支持 findIndex 方法的对象上调用它时。findIndex 是JavaScript 数组的一个方法,用于找出数组中满足提供的测试函数的第一个元素的索引。如果不满足使用条件,就会抛出这个错误。下面我将根据提示逐一分析可能导致这个错误的原因,并提供相应的解决方案。 确认...
arr.forEach(function(item,index){ console.log(item); }); 1. 2. 3. 4. 这个方法是没有返回值的,仅仅是遍历数组中的每一项,不对原来数组进行修改; 但是可以自己通过数组的索引来修改原来的数组; var ary = [12,23,24,42,1]; var res = ary.forEach(function (item,index,input) { input[index...
原因多半在于 有的清空下 你调用 findIndex的变量并不是数组
Developers Javascript JavaScript require vs import Pooja Hariharan 2min read Developers JavaScript Check if a variable is of function type or not Pooja Hariharan 3min read Developers Javascript Get current time using JavaScript Pooja Hariharan 2min read Hire TalentFind remote jobsBrowse...
Java replaceAll function of string does not replace Possible Duplicate: Wrong output using replaceall If I have string: the test result is still: test = "replace()thisquotes" so () is not replaced. Any ideas? You don't need regex, so use:... ...
{// mapped is not constraint type so add mapped group explicitlyif(findIndex(inGroups(), mappedPolyPatch::typeName) ==-1) { inGroups().append(mappedPolyPatch::typeName); } } 开发者ID:Kiiree,项目名称:RapidCFD-dev,代码行数:18,代码来源:mappedWallPolyPatch.C ...
Array.prototype._forEach=function(fn){if(this===null)thrownewTypeError('this is null or not defined');if(typeoffn!=='function')thrownewTypeError('fn must be a function');letthat=Object(this),len=this.length>>>0,thisArg=null;if(arguments[1])thisArg=arguments[1];for(leti=0;i<len;i...
最近公司组织架构调整（反正每次组织架构调整，领导就会下场。有一个idea或者有重构一下，先定一个月底上...
Thrown if predicate does not return true for any element. Return Value The index of the first element in the array that satisfies the given predicate. Remarks This function is namedFindIndexin compiled assemblies. If you are accessing the function from a language other than F#, or through refl...
Let’s say a function is isOdd – that checks if the given value is odd or not. Here our function is idOdd and the value being passed using ages.findIndex() command. Here every element is checked for idd condition, and the index of the first odd element is returned. Index and array...