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Cast from VARCHAR to INT - MySQL
...ution. - - - - - - - - - - - - - Long Version: From the manual: To cast a string to a number, you normally need do nothing other than use the string value in numeric context Although I'd use +0 instead of *1 since addition is faster.
– Mindwin
Oct 24 '16 at 14...
Can I have H2 autocreate a schema in an in-memory database?
...ents when connecting. You could run a script, or just a statement or two:
String url = "jdbc:h2:mem:test;" +
"INIT=CREATE SCHEMA IF NOT EXISTS TEST"
String url = "jdbc:h2:mem:test;" +
"INIT=CREATE SCHEMA IF NOT EXISTS TEST\\;" +
"SET SCHEMA TEST";
Stri...
Access parent URL from iframe
...his doesn't seem to work with Edge browser - the referrer will be an empty string.. stackoverflow.com/questions/24169219/…
– Davide Orazio Montersino
May 23 '17 at 9:59
...
How to get the size of a JavaScript object?
... ) {
bytes += 4;
}
else if ( typeof value === 'string' ) {
bytes += value.length * 2;
}
else if ( typeof value === 'number' ) {
bytes += 8;
}
else if
(
typeof value === 'object'
&&...
Why should I capitalize my SQL keywords? [duplicate]
Simple question. I personally find a string of lowercase characters to be more readable than a string of uppercase characters. Is some old/popular flavor of SQL case-sensitive or something?
...
Why were pandas merges in python faster than data.table merges in R in 2012?
... may have discovered a known issue in data.table when the number of unique strings (levels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent effo...
Determine if code is running as part of a unit test
...tatic class UnitTestDetector
{
static UnitTestDetector()
{
string testAssemblyName = "Microsoft.VisualStudio.QualityTools.UnitTestFramework";
UnitTestDetector.IsInUnitTest = AppDomain.CurrentDomain.GetAssemblies()
.Any(a => a.FullName.StartsWith(testAssemblyNam...
Listen for key press in .NET console app
... stop your app, but do your work in a background thread:
static void Main(string[] args)
{
var myWorker = new MyWorker();
myWorker.DoStuff();
Console.WriteLine("Press any key to stop...");
Console.ReadKey();
}
In the myWorker.DoStuff() function you would then invoke another functi...
Is it possible to Pivot data using LINQ?
...r column ordering
var r = s.Pivot3(e => e.custID, e => e.OrderDate.ToString("MMM-yyyy")
, lst => lst.Sum(e => e.Qty));
// order r(esult) by CustID
(+) generic implementation
(-) definitely slower than Amy B's
Can anyone improve my implementation (i.e. the method does the orderin...
System.Net.WebException HTTP status code
...t ex.Status to get the WebExceptionStatus.
If you just want a descriptive string to log in case of a failure you can use the null-coalescing operator (??) to get the relevant error:
string status = (ex.Response as HttpWebResponse)?.StatusCode.ToString()
?? ex.Status.ToString();
If the except...