How can I extract subsequent occurrence in this pattern:
DisplayMetricsSo for example I want to extract 3rd occurrence only, I've tried to use:
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics); //the error is on all 3 methods here
int height = metrics.heightPixels;
int width = metrics.widthPixels;
But it extracts from 3rd occurrence and everything after it.
答案 0 :(得分：0)
The REGEXP_EXTRACT reference shows an example of using a capturing group to extract the portion of a string you need.
So, match up to the 3rd part, and then capture the 3rd value:
<div contenteditable="true">
<span style='background-color: lightgreen'>ab</span><span data-end></span>c<span style='background-color: lightgreen'>ab</span>
</div>Here is a demo, the green highlighted part will get extracted.
Details
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp1.0</TargetFramework>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="Mono.Data.OracleClientCore" Version="1.0.0" />
</ItemGroup>
</Project>
- start of stringusing System;
using System.Data.OracleClient;
namespace TestCore
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Starting.\r\n");
using (var _db = new OracleConnection("User Id=myUser;Password=myPassword;Data Source=MyOracleConnection"))
{
Console.WriteLine("Open connection...");
_db.Open();
Console.WriteLine( "Connected to:" +_db.ServerVersion);
Console.WriteLine("\r\nDone. Press key for exit");
Console.ReadKey();
}
}
}
}
- 2 occurrences of:
^(?:[^|]*[|]){2}([^|]*)
- zero or more chars other than ^(?:[^|]*[|]){2} - a [^|]* pipe symbol| - Group 1: zero or more chars other than [|].