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Why do we need boxing and unboxing in C#?
...off without implied boxing conversions. Casting a value type like List<string>.Enumerator to IEnumerator<string> yields an object which mostly behaves like a class type, but with a broken Equals method. A better way to cast List<string>.Enumerator to IEnumerator<string> wou...
Opposite of String.Split with separators (.net)
Is there a way to do the opposite of String.Split in .Net? That is, to combine all the elements of an array with a given separator.
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How to format a DateTime in PowerShell
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The same as you would in .NET:
$DateStr = $Date.ToString("yyyyMMdd")
Or:
$DateStr = '{0:yyyyMMdd}' -f $Date
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How to keep index when using pandas merge
...ng multi-index, your indices will be stored as a tuple in a single column called a[copy_index]
– geekidharsh
Nov 6 '19 at 6:19
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How to format strings using printf() to get equal length in the output?
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You can specify width on string fields, e.g.
printf("%-20s", "initialization...");
and then whatever's printed with that field will be blank-padded to the width you indicate.
The - left-justifies your text in that field.
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How to open a web page from my application?
...), it is safer to encapsulate it in a function that checks that the passed string is indeed a URI, to avoid accidentally starting random processes on the machine.
public static bool IsValidUri(string uri)
{
if (!Uri.IsWellFormedUriString(uri, UriKind.Absolute))
return false;
Uri t...
typecast string to integer - Postgres
...hich has raw feeds in Varchar, I need to import a column in varchar into a string column. I tried using the <column_name>::integer as well as to_number(<column_name>,'9999999') but I am getting errors, as there are a few empty fields, I need to retrieve them as empty or null into the...
Is there a version of JavaScript's String.indexOf() that allows for regular expressions?
In javascript, is there an equivalent of String.indexOf() that takes a regular expression instead of a string for the first first parameter while still allowing a second parameter ?
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What is the best Battleship AI?
... public class RandomOpponent : IBattleshipOpponent
{
public string Name { get { return "Random"; } }
public Version Version { get { return this.version; } }
Random rand = new Random();
Version version = new Version(1, 1);
Size gameSize;
public...
What does && mean in void *p = &&abc;
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@Lundin: Same can be said of most compilers. __forceinline? __declspec(naked)? One of my favourite MSVCisms is: template<typename T> class X { friend T; }, which is invalid C++03.
– Sebastian Mach
Aug 17 '12 at 8:20
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