public static IEnumerable <T> Segment <T>
(
[NotNull] this IEnumerable <T> list,
int offset,
int count
)
{
Sure.NotNull(list, nameof(list));
Sure.NonNegative(offset, nameof(offset));
Sure.NonNegative(count, nameof(count));
int index = 0;
foreach (T obj in list)
{
if (index < offset)
{
index++;
}
else if (count > 0)
{
yield return(obj);
count--;
}
else
{
break;
}
}
}
/// <summary>
/// Try to execute specified function.
/// </summary>
public TResult Try <T1, T2, T3, TResult>
(
[NotNull] Func <T1, T2, T3, TResult> function,
T1 argument1,
T2 argument2,
T3 argument3
)
{
Sure.NotNull(function, "function");
for (int i = 0; i <= RetryLimit; i++)
{
try
{
return(function(argument1, argument2, argument3));
}
catch (Exception ex)
{
_Resolve(i, ex);
}
}
Log.Error
(
"RetryManager::Try: "
+ "giving up"
);
throw new ArsMagnaException("RetryManager failed");
}
public static T[][] SplitArray <T>
(
[NotNull] T[] array,
int partCount
)
{
Sure.NotNull(array, nameof(array));
Sure.Positive(partCount, nameof(partCount));
List <T[]> result = new List <T[]>(partCount);
int length = array.Length;
int chunkSize = length / partCount;
while (chunkSize * partCount < length)
{
chunkSize++;
}
int offset = 0;
for (int i = 0; i < partCount; i++)
{
int size = Math.Min(chunkSize, length - offset);
T[] chunk = new T[size];
Array.Copy(array, offset, chunk, 0, size);
result.Add(chunk);
offset += size;
}
return(result.ToArray());
}
public static string DumpBytes
(
[NotNull] byte[] buffer
)
{
Sure.NotNull(buffer, nameof(buffer));
StringBuilder result = new StringBuilder(buffer.Length * 5);
int offset;
for (offset = 0; offset < buffer.Length; offset += 16)
{
result.AppendFormat
(
"{0:X6}:",
offset
);
int run = Math.Min(buffer.Length - offset, 16);
for (int i = 0; i < run; i++)
{
result.AppendFormat
(
" {0:X2}",
buffer[offset + i]
);
}
result.AppendLine();
}
return(result.ToString());
}
/// <summary>
/// Whether segment of first array
/// coincides with segment of second array.
/// </summary>
public static bool Coincide <T>
(
[NotNull] T[] firstArray,
int firstOffset,
[NotNull] T[] secondArray,
int secondOffset,
int length
)
where T : IEquatable <T>
{
Sure.NotNull(firstArray, nameof(firstArray));
Sure.NotNull(secondArray, nameof(secondArray));
Sure.NonNegative(firstOffset, nameof(firstOffset));
Sure.NonNegative(secondOffset, nameof(secondOffset));
Sure.NonNegative(length, nameof(length));
// Совпадают ли два куска массивов?
// Куски нулевой длины считаются совпадающими.
for (int i = 0; i < length; i++)
{
T first = firstArray[firstOffset + i];
T second = secondArray[secondOffset + i];
if (!first.Equals(second))
{
return(false);
}
}
return(true);
}
/// <summary>
/// Try to execute specified function.
/// </summary>
public void Try <T1, T2, T3>
(
[NotNull] Action <T1, T2, T3> action,
T1 argument1,
T2 argument2,
T3 argument3
)
{
Sure.NotNull(action, "action");
for (int i = 0; i <= RetryLimit; i++)
{
try
{
action(argument1, argument2, argument3);
return;
}
catch (Exception ex)
{
_Resolve(i, ex);
}
}
Log.Error
(
"RetryManager::Try: "
+ "giving up"
);
throw new ArsMagnaException("RetryManager failed");
}
/// <summary>
/// Try to execute specified function.
/// </summary>
public T Try <T>
(
[NotNull] Func <T> function
)
{
Sure.NotNull(function, "function");
for (int i = 0; i <= RetryLimit; i++)
{
try
{
return(function());
}
catch (Exception ex)
{
_Resolve(i, ex);
}
}
Log.Error
(
"RetryManager::Try: "
+ "giving up"
);
throw new ArsMagnaException("RetryManager failed");
}
public static T GetOccurrence <T>
(
[NotNull] this T[] array,
int occurrence,
[CanBeNull] T defaultValue
)
{
Sure.NotNull(array, nameof(array));
int length = array.Length;
occurrence = occurrence >= 0
? occurrence
: length + occurrence;
T result = defaultValue;
if (length != 0 &&
occurrence >= 0 &&
occurrence < length)
{
result = array[occurrence];
}
return(result);
}
public static T[] GetSpan <T>
(
[NotNull] this T[] array,
int offset,
int count
)
{
Sure.NotNull(array, nameof(array));
Sure.NonNegative(offset, nameof(offset));
Sure.NonNegative(count, nameof(count));
if (offset > array.Length)
{
return(new T[0]);
}
if (offset + count > array.Length)
{
count = array.Length - offset;
}
if (count <= 0)
{
return(new T[0]);
}
T[] result = new T[count];
Array.Copy(array, offset, result, 0, count);
return(result);
}
/// <summary>
/// Compares two specified arrays by elements.
/// </summary>
/// <param name="firstArray">First array to compare.</param>
/// <param name="secondArray">Second array to compare.</param>
/// <returns><para>Less than zero - first array is less.</para>
/// <para>Zero - arrays are equal.</para>
/// <para>Greater than zero - first array is greater.</para>
/// </returns>
/// <typeparam name="T">Array element type.</typeparam>
/// <exception cref="ArgumentNullException">
/// <paramref name="firstArray"/> or
/// <paramref name="secondArray"/> is <c>null</c>.
/// </exception>
/// <exception cref="ArgumentException">Length of
/// <paramref name="firstArray"/> is not equal to length of
/// <paramref name="secondArray"/>.
/// </exception>
public static int Compare <T>
(
[NotNull] T[] firstArray,
[NotNull] T[] secondArray
)
where T : IComparable <T>
{
Sure.NotNull(firstArray, nameof(firstArray));
Sure.NotNull(secondArray, nameof(secondArray));
if (firstArray.Length != secondArray.Length)
{
Log.Error
(
nameof(ArrayUtility) + "::" + nameof(Compare)
+ ": length not equal"
);
throw new ArgumentException();
}
for (int i = 0; i < firstArray.Length; i++)
{
int result = firstArray[i].CompareTo(secondArray[i]);
if (result != 0)
{
return(result);
}
}
return(0);
}
/// <summary>
/// Переключение кодовой страницы вывода консоли.
/// </summary>
public static void SetOutputCodePage
(
[NotNull] string codePage
)
{
Sure.NotNullNorEmpty(codePage, nameof(codePage));
SetOutputCodePage(Encoding.GetEncoding(codePage));
}
/// <summary>
/// Constructor.
/// </summary>
public UniversalComparer
(
[NotNull] Func <T, T, int> function
)
{
Sure.NotNull(function, nameof(function));
Function = function;
}
/// <summary>
/// Constructor.
/// </summary>
public ExceptionEventArgs
(
[NotNull] T exception
)
{
Sure.NotNull(exception, nameof(exception));
Exception = exception;
}
/// <summary>
/// Construction.
/// </summary>
public RetryManager
(
int retryLimit
)
{
Sure.Positive(retryLimit, "retryLimit");
RetryLimit = retryLimit;
}
public static IEnumerable <T> NonNullItems <T>
(
[NotNull] this IEnumerable <T> sequence
)
where T : class
{
Sure.NotNull(sequence, nameof(sequence));
return(sequence.Where(value => !ReferenceEquals(value, null)));
}
/// <summary>
/// Verify sub-object.
/// </summary>
public Verifier <T> VerifySubObject
(
[NotNull] IVerifiable verifiable
)
{
Sure.NotNull(verifiable, nameof(verifiable));
Assert(verifiable.Verify(ThrowOnError));
return(this);
}
public ArsMagnaException Attach
(
[NotNull] BinaryAttachment attachment
)
{
Sure.NotNull(attachment, nameof(attachment));
Attachments.Add(attachment);
return(this);
}
/// <summary>
/// Constructor.
/// </summary>
public RetryManager
(
int retryLimit,
[CanBeNull] Func <Exception, bool> resolver
)
{
Sure.Positive(retryLimit, "retryLimit");
RetryLimit = retryLimit;
_resolver = resolver;
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="name">Name of the attachment.</param>
/// <param name="content">Content of the attachment.</param>
public BinaryAttachment
(
[NotNull] string name,
[NotNull] byte[] content
)
{
Sure.NotNullNorEmpty(name, nameof(name));
Sure.NotNull(content, nameof(content));
Name = name;
Content = content;
}
public static TTo[] ChangeType <TTo>
(
[NotNull] Array sourceArray
)
{
Sure.NotNull(sourceArray, nameof(sourceArray));
TTo[] result = new TTo[sourceArray.Length];
Array.Copy(sourceArray, result, sourceArray.Length);
return(result);
}
/// <summary>
/// Verify sub-object.
/// </summary>
public Verifier <T> VerifySubObject
(
[NotNull] IVerifiable verifiable,
[NotNull] string name
)
{
Sure.NotNull(verifiable, nameof(verifiable));
Sure.NotNullNorEmpty(name, nameof(name));
Assert(verifiable.Verify(ThrowOnError), name);
return(this);
}
public static string ToInvariantString
(
this decimal value,
[NotNull] string format
)
{
Sure.NotNullNorEmpty(format, nameof(format));
return(value.ToString
(
format,
CultureInfo.InvariantCulture
));
}
public static string ConvertIntegerToInvariant
(
[NotNull] string text
)
{
Sure.NotNull(text, nameof(text));
if (text.Contains(','))
{
text = text.Replace(",", string.Empty);
}
return(text);
}
public static T FirstOr <T>
(
[NotNull] this IEnumerable <T> list,
[CanBeNull] T defaultValue
)
{
Sure.NotNull(list, nameof(list));
foreach (T item in list)
{
return(item);
}
return(defaultValue);
}
/// <summary>
/// Constructor.
/// </summary>
public StringFragment
(
[NotNull] string original,
int offset,
int length
)
{
Sure.NotNull(original, nameof(original));
Sure.NonNegative(offset, nameof(offset));
Sure.NonNegative(length, nameof(length));
Original = original;
Offset = offset;
Length = length;
}
public static TTo[] Convert <TFrom, TTo>
(
[NotNull] TFrom[] array
)
{
Sure.NotNull(array, nameof(array));
TTo[] result = new TTo[array.Length];
for (int i = 0; i < array.Length; i++)
{
result[i] = ConversionUtility.ConvertTo <TTo>(array[i]);
}
return(result);
}
public static IEnumerable <T> Tee <T>
(
[NotNull] this IEnumerable <T> list,
[NotNull] Action <T> action
)
{
Sure.NotNull(list, nameof(list));
Sure.NotNull(action, nameof(action));
foreach (T item in list)
{
action(item);
yield return(item);
}
}
public static T[] Create <T>
(
int length,
T initialValue
)
{
Sure.NonNegative(length, nameof(length));
T[] result = new T[length];
for (int i = 0; i < length; i++)
{
result[i] = initialValue;
}
return(result);
}
public static IEnumerable <T> Repeat <T>
(
[NotNull] IEnumerable <T> list,
int count
)
{
Sure.NotNull(list, nameof(list));
while (count-- > 0)
{
// ReSharper disable once PossibleMultipleEnumeration
foreach (T value in list)
{
yield return(value);
}
}
}
/// <summary>
/// Clone the array.
/// </summary>
public static T[] Clone <T>
(
[NotNull] T[] array
)
where T : ICloneable
{
Sure.NotNull(array, nameof(array));
T[] result = (T[])array.Clone();
for (int i = 0; i < array.Length; i++)
{
result[i] = (T)array[i].Clone();
}
return(result);
}