A map is a collection of key-value pairs where each unique key maps to a single value. Keys and values can be any data type—primitive types, collections, sObjects, user-defined types, and built-in Apex types.
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Salesforce Maps Apex Developer Guide
在上面的代码中，如果有大量记录（例如50000条），则for循环将被执行50000次，并且for循环中的每一行也将被执行50000次。我们可以通过使用良好的SOQL查询来避免不必要的for循环，该查询将返回map而不是list。之后，我们可以使用方法轻松获得客户列表或一组客户ID或客户ID列表。新的Apex代码如下：List<id> accIdsList ...
This repository contains all the information shared during my Learn 365 Challenge. Learn 365 is a challenge to keep the learning spirit going on and challenge myself to learn something daily for the whole year, it can be anything from infosec to general life. Follow me on Twitter for Regular...
Apex 対応付けとリストの参照 動的バインドを使用する Visualforce ページは、マークアップ内の ApexMapおよびListデータ型を参照できます。 たとえば、ApexListが次のように定義されている場合、 publicList<String>people{get{returnnewList<String>{'Winston','Julia','Brien'};}set;}publicList<In...
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One common usage of this map type is for in-memory “joins” between two tables. RecentlyViewed records for users who are members of several communities can’t be retrieved automatically into a map via Apex. This is because records of a user with different networks can result in duplicate ...