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leading zeros in rails
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You can't store 01 as integer. It will be converted to 1
You can store it as a string, or you can show it as a string "01"
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Why must a lambda expression be cast when supplied as a plain Delegate parameter
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A lambda expression can either be converted to a delegate type or an expression tree - but it has to know which delegate type. Just knowing the signature isn't enough. For instance, suppose I have:
public delegate void Action1();
public delegate void Action2...
How can I get a count of the total number of digits in a number?
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Without converting to a string you could try:
Math.Ceiling(Math.Log10(n));
Correction following ysap's comment:
Math.Floor(Math.Log10(n) + 1);
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make arrayList.toArray() return more specific types
...being unable to use generic constructors. So while it knows you need it to convert you an object like String[] or MyObject[], it cannot instantiate it on its own.
– user1499731
Apr 18 '13 at 20:23
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How do you get a timestamp in JavaScript?
... the timestamp in milliseconds:
new Date().getTime()
Which you can then convert to seconds like this:
Math.round(new Date().getTime()/1000)
And you can also use the valueOf method which we showed above:
new Date().valueOf()
Timestamp in Milliseconds
var timeStampInMs = window.performan...
Comparing two byte arrays in .NET
...able fluff into your own application's code base:
// byte[] is implicitly convertible to ReadOnlySpan<byte>
static bool ByteArrayCompare(ReadOnlySpan<byte> a1, ReadOnlySpan<byte> a2)
{
return a1.SequenceEqual(a2);
}
The (guts of the) implementation as of .NET Core 3.1.0 can ...
What is the difference between NULL, '\0' and 0?
...ion of this type, cast to type void * is a null pointer constant, which if converted to a pointer becomes a null pointer. It is guaranteed by the standard to compare unequal to any pointer to any object or function.
NULL is a macro, defined in as a null pointer constant.
\0 is a construction used...
What are the advantages of NumPy over regular Python lists?
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I've been trying to use "sys.getsizeof()" to compare the size of Python lists and NumPy arrays with the same number of elements and it doesn't seem to indicate that the NumPy arrays were that much smaller. Is this the case or is sys.getsizeof() havin...
A circular reference was detected while serializing an object of type 'SubSonic.Schema .DatabaseColu
... had the same problem and solved by using Newtonsoft.Json;
var list = JsonConvert.SerializeObject(model,
Formatting.None,
new JsonSerializerSettings() {
ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore
});
return Content(list, "application/json");
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How to configure socket connect timeout
...IPAddress ip = IPAddress.Parse(serverIp);
int iPortNo = System.Convert.ToInt16(serverPort);
IPEndPoint ipEnd = new IPEndPoint(ip, iPortNo);
//m_clientSocket.
e.RemoteEndPoint = ipEnd;
e.UserToken = m_clientSocket;
e.Completed+=...