Returns a random double in the specified range.

Use Random.nextDouble() to generate a random number between 0.0 and 1.0 and map it to the desired range.
Omit the optional parameter, min, to use a default minimu value of 0.0.
Omit the optional parameter, max, to use a default maximum value of 1.0.

继续阅读 30秒学会 Dart 片段 – randomDoubleInRange

Converts a hexadecimal string to a byte array.

Use Enumerable.Range() in combination with string.Length to get the indices of the given string in an array.
Use Enumerable.Where() to get only the even indices in the previous range.
Use Enumerable.Select() in combination with Convert.ToByte() and string.Substring() to convert each byte’s hex code to a byte.
Finally, use Enumerable.ToArray() to return a byte[].

继续阅读 30秒学会 C# 片段 – HexToByteArray

Replaces all but the last num runes of a string with the specified mask.

Use String.substring() to grab the last num runes, String.padLeft() to fill the beginning of the string with the mask up to the original length.
Omit the optional parameter, num, to keep a default of 4 runes unmasked.
Omit the optional parameter, mask, to use the default of '*'.

继续阅读 30秒学会 Dart 片段 – mask

Returns the human readable format of the given number of seconds.

Use TimeSpan.FromSeconds() to convert the number of seconds to a TimeSpan object.
Use TimeSpan.ToString() with an appropriate format specifier to return a human readable string of the value.

继续阅读 30秒学会 C# 片段 – FormatDuration

Returns a a list of n random integers in the specified range.

Use List.generate() to generate a list with n terms, using a function that returns a random integer between min and max.
Omit the optional parameter, min, to use a default minimu value of 0.
Omit the optional parameter, max, to use a default maximum value of 100.

继续阅读 30秒学会 Dart 片段 – randomIntListInRange