ef6/src/Common/IEnumerableExtensions.cs at main · dotnet/ef6 · GitHub

Name: ef6/src/Common/IEnumerableExtensions.cs at main · dotnet/ef6 · GitHub
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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.

#if SQLSERVER
namespaceSystem.Data.Entity.SqlServer.Utilities
#elif SQLSERVERCOMPACT
namespaceSystem.Data.Entity.SqlServerCompact.Utilities
#else
namespaceSystem.Data.Entity.Utilities
#endif
{
usingSystem.Collections.Generic;
usingSystem.Diagnostics;
usingSystem.Linq;

[DebuggerStepThrough]
internalstaticclassIEnumerableExtensions
{
publicstaticstringUniquify(thisIEnumerable<string>inputStrings,stringtargetString)
{
DebugCheck.NotNull(inputStrings);
DebugCheck.NotEmpty(targetString);

varuniqueString=targetString;
vari=0;

while(inputStrings.Any(n =>string.Equals(n,uniqueString,StringComparison.Ordinal)))
{
uniqueString=targetString+++i;
}

returnuniqueString;
}

publicstaticvoidEach<T>(thisIEnumerable<T>ts,Action<T,int>action)
{
DebugCheck.NotNull(ts);
DebugCheck.NotNull(action);

vari=0;
foreach(vartints)
{
action(t,i++);
}
}

publicstaticvoidEach<T>(thisIEnumerable<T>ts,Action<T>action)
{
DebugCheck.NotNull(ts);
DebugCheck.NotNull(action);

foreach(vartints)
{
action(t);
}
}

publicstaticvoidEach<T,S>(thisIEnumerable<T>ts,Func<T,S>action)
{
DebugCheck.NotNull(ts);
DebugCheck.NotNull(action);

foreach(vartints)
{
action(t);
}
}

publicstaticstringJoin<T>(thisIEnumerable<T>ts,Func<T,string>selector=null,stringseparator=", ")
{
DebugCheck.NotNull(ts);

selector=selector??(t =>t.ToString());

returnstring.Join(separator,ts.Where(t =>!ReferenceEquals(t,null)).Select(selector));
}

publicstaticIEnumerable<TSource>Prepend<TSource>(thisIEnumerable<TSource>source,TSourcevalue)
{
DebugCheck.NotNull(source);

yieldreturnvalue;

foreach(varelementinsource)
{
yieldreturnelement;
}
}

publicstaticIEnumerable<TSource>Append<TSource>(thisIEnumerable<TSource>source,TSourcevalue)
{
DebugCheck.NotNull(source);

foreach(varelementinsource)
{
yieldreturnelement;
}

yieldreturnvalue;
}
}
}