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我有一個列表,我只是想過濾。 Array.find和filter都會產生錯誤。Array.Filter和找不到錯誤角度4
功能:
setSupplierDetails(supplierId) {
const supplier = this.suppliers.filter(tempSupplier => tempSupplier.id === supplierId)[0];
this.supplierName = supplier.supplierName;
} 錯誤:
ERROR TypeError: Cannot read property 'filter' of undefined
at AddEditRestockComponent.webpackJsonp.../../../../../src/app/restock/add-edit-restock/add-edit-restock.component.ts.AddEditRestockComponent.setProductRelatedInfo
顯然,'this.suppliers'沒有被定義。確保它不僅被聲明,而且被初始化(例如'suppliers:SomeClass [] = [];')。 – ConnorsFan
發佈'this.suppliers' –
我找到了答案。我通過setSupplierDetails(supplierId)將supplierId作爲一個我意識到導致問題的數字。 setSupplierDetails(supplierId){供應商= this.suppliers.filter(tempSupplier => tempSupplier.id === + supplierId)[0]; this.supplierName = supplier.supplierName; – user3701188