public static T[] GetSpan <T>
(
[NotNull] this T[] array,
int offset
)
{
Sure.NotNull(array, nameof(array));
Sure.NonNegative(offset, nameof(offset));
if (offset >= array.Length)
{
return(new T[0]);
}
int count = array.Length - offset;
T[] result = array.GetSpan(offset, count);
return(result);
}
/// <summary>
/// Try to execute specified function.
/// </summary>
public void Try
(
[NotNull] Action action
)
{
Sure.NotNull(action, "action");
for (int i = 0; i <= RetryLimit; i++)
{
try
{
action();
break;
}
catch (Exception ex)
{
_Resolve(i, ex);
}
}
}
/// <summary>
/// Get max or default value for the sequence.
/// </summary>
public static TOutput MaxOrDefault <TInput, TOutput>
(
[NotNull] this IEnumerable <TInput> sequence,
[NotNull] Func <TInput, TOutput> selector,
TOutput defaultValue
)
{
Sure.NotNull(sequence, nameof(sequence));
Sure.NotNull(selector, nameof(selector));
TInput[] array = sequence.ToArray();
if (array.Length == 0)
{
return(defaultValue);
}
TOutput result = array.Max(selector);
return(result);
}
public static string ConvertFloatToInvariant
(
[NotNull] string text
)
{
Sure.NotNull(text, nameof(text));
if (text.Contains(','))
{
if (text.Contains('.'))
{
text = text.Replace(",", string.Empty);
}
else
{
text = text.Replace(',', '.');
}
}
return(text);
}
public static IEnumerable <T> Replace <T>
(
[NotNull] this IEnumerable <T> list,
[CanBeNull] T replaceFrom,
[CanBeNull] T replaceTo
)
where T : IEquatable <T>
{
Sure.NotNull(list, nameof(list));
foreach (T item in list)
{
if (item.Equals(replaceFrom))
{
yield return(replaceTo);
}
else
{
yield return(item);
}
}
}
public static T ThrowIfNull <T>
(
[CanBeNull] this T value,
[NotNull] string message
)
where T : class
{
Sure.NotNull(message, nameof(message));
if (ReferenceEquals(value, null))
{
Log.Error
(
nameof(Utility) + "::" + nameof(ThrowIfNull)
+ ": "
+ message
);
throw new ArgumentException(message);
}
return(value);
}
/// <summary>
/// Separate the sequence with given separator.
/// </summary>
public static IEnumerable Separate
(
[NotNull] this IEnumerable sequence,
[CanBeNull] object separator
)
{
Sure.NotNull(sequence, nameof(sequence));
bool first = true;
foreach (object obj in sequence)
{
if (first)
{
first = false;
}
else
{
yield return(separator);
}
yield return(obj);
}
}
/// <summary>
/// Reports the index of the first occurrence in this instance
/// of any string in a specified array.
/// </summary>
public static int IndexOfAny
(
[NotNull] this string text,
out int which,
params string[] anyOf
)
{
Sure.NotNull(text, nameof(text));
int result = -1;
which = -1;
for (int i = 0; i < anyOf.Length; i++)
{
string value = anyOf[i];
int index = text.IndexOf(value, StringComparison.Ordinal);
if (index >= 0)
{
if (result >= 0)
{
if (index < result)
{
result = index;
which = i;
}
}
else
{
result = index;
which = i;
}
}
}
return(result);
}
public static T[] Merge <T>
(
[NotNull] params T[][] arrays
)
{
Sure.NotNull(arrays, nameof(arrays));
int resultLength = 0;
for (int i = 0; i < arrays.Length; i++)
{
if (ReferenceEquals(arrays[i], null))
{
Log.Error
(
nameof(ArrayUtility) + "::" + nameof(Merge)
+ ": array["
+ i
+ "] is null"
);
throw new ArgumentNullException(nameof(arrays));
}
resultLength += arrays[i].Length;
}
T[] result = new T[resultLength];
int offset = 0;
for (int i = 0; i < arrays.Length; i++)
{
arrays[i].CopyTo(result, offset);
offset += arrays[i].Length;
}
return(result);
}
public static IEnumerable <T[]> Slice <T>
(
[NotNull] this IEnumerable <T> sequence,
int pieceSize
)
{
Sure.NotNull(sequence, nameof(sequence));
if (pieceSize <= 0)
{
Log.Error
(
nameof(Sequence) + "::" + nameof(Slice)
+ "pieceSize="
+ pieceSize
);
throw new ArgumentOutOfRangeException(nameof(pieceSize));
}
List <T> piece = new List <T>(pieceSize);
foreach (T item in sequence)
{
piece.Add(item);
if (piece.Count >= pieceSize)
{
yield return(piece.ToArray());
piece = new List <T>(pieceSize);
}
}
if (piece.Count != 0)
{
yield return(piece.ToArray());
}
}
/// <summary>
/// Converts given object to boolean value.
/// </summary>
/// <param name="value">Object to be converted.</param>
/// <returns>Converted value.</returns>
/// <exception cref="FormatException">
/// Value can't be converted.
/// </exception>
public static bool ToBoolean
(
[NotNull] object value
)
{
Sure.NotNull(value, "value");
if (value is bool)
{
return((bool)value);
}
try
{
bool result = bool.Parse(value as string);
return(result);
}
// ReSharper disable once EmptyGeneralCatchClause
catch
{
// Pass through
}
string svalue = value as string;
if (!ReferenceEquals(svalue, null))
{
svalue = svalue.ToLowerInvariant();
if (svalue == "false" ||
svalue == "0" ||
svalue == "no" ||
svalue == "n" ||
svalue == "off" ||
svalue == "negative" ||
svalue == "neg" ||
svalue == "disabled" ||
svalue == "incorrect" ||
svalue == "wrong" ||
svalue == "нет"
)
{
return(false);
}
if (svalue == "true" ||
svalue == "1" ||
svalue == "yes" ||
svalue == "y" ||
svalue == "on" ||
svalue == "positiva" ||
svalue == "pos" ||
svalue == "enabled" ||
svalue == "correct" ||
svalue == "right" ||
svalue == "да"
)
{
return(true);
}
}
if (value is IConvertible)
{
return(Convert.ToBoolean(value));
}
TypeConverter converterFrom = TypeDescriptor.GetConverter(value);
if (!ReferenceEquals(converterFrom, null) &&
converterFrom.CanConvertTo(typeof(bool)))
{
return((bool)converterFrom.ConvertTo
(
value,
typeof(bool)
));
}
Log.Error
(
nameof(ConversionUtility) + "::" + nameof(ToBoolean)
+ "bad value="
+ value
);
throw new FormatException
(
"Bad value " + value
);
}