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add comment and use for instead of foreach

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弘韬 张 2021-04-02 00:40:25 +08:00
parent 362504e223
commit d09ff638b3
1 changed files with 17 additions and 4 deletions
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21
Flow.Launcher/Storage/UserSelectedRecord.cs
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@ -1,4 +1,5 @@
using System.Collections.Generic;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json.Serialization;
using Flow.Launcher.Infrastructure;
@ -24,18 +25,30 @@ namespace Flow.Launcher.Storage
unchecked
{
// skip the empty space
foreach (var item in query.ActionKeyword.Concat(query.Search))
// https://stackoverflow.com/a/5155015 31 prime and is 2^5 - 1 which allows fast
// optimization without information lost when int overflow
for (int i = 0; i < query.ActionKeyword.Length; i++)
{
char item = query.ActionKeyword[i];
hashcode = hashcode * 31 + item;
}
for (int i = 0; i < query.Search.Length; i++)
{
char item = query.Search[i];
hashcode = hashcode * 31 + item;
}
foreach (var item in result.Title)
for (int i = 0; i < result.Title.Length; i++)
{
char item = result.Title[i];
hashcode = hashcode * 31 + item;
}
foreach (var item in result.SubTitle)
for (int i = 0; i < result.SubTitle.Length; i++)
{
char item = result.SubTitle[i];
hashcode = hashcode * 31 + item;
}
return hashcode;