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Check empty string in Swift?
...
There is now the built in ability to detect empty string with .isEmpty:
if emptyString.isEmpty {
print("Nothing to see here")
}
Apple Pre-release documentation: "Strings and Characters".
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How to convert QString to std::string?
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As of Qt 5.0, QString::toStdString() now uses QString::toUtf8() to perform the conversion, so the Unicode properties of the string will not be lost (qt-project.org/doc/qt-5.0/qtcore/qstring.html#toStdString).
– Emile Cormier
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How do I make a UITableViewCell appear disabled?
I know about UITableview: How to Disable Selection for Some Rows but Not Others and cell.selectionStyle = UITableViewCellSelectionStyleNone , but how do I make a cell (or any UIView for that matter) appear disabled (grayed-out) like below?
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Cannot convert lambda expression to type 'string' because it is not a delegate type [duplicate]
...o string" error, and a few errors after another one more related to the unknown/erroneous field.
In your case it could be :
objContentLine = (from q in db.qryContents
where q.LineID == Value
orderby q.RowID descending
select q).FirstOrDefault();
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Change SQLite database mode to read-write
...mod 777 <db_folder>
Where contains the database file.
It works. Now I can access my database and make insert queries.
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How to parse float with two decimal places in javascript?
..., had a string variable instead of a number, which toFixed() needs - fixed now. But Rob's answer using Math.round is something to consider in terms of performance.
– pvanallen
Apr 9 '15 at 19:26
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how to delete all commit history in github? [duplicate]
...Hub repository:
git init
git remote add origin git@github.com:user/repo
now commit your current version of code
git add *
git commit -am 'message'
and finally force the update to GitHub:
git push -f origin master
However, I suggest backing up the history (the .git folder in the repository) ...
How do I copy items from list to list without foreach?
...<Student> lstStudent = db.Students.Where(s => s.DOB < DateTime.Now).ToList().CopyList();
Method:
public static List<T> CopyList<T>(this List<T> lst)
{
List<T> lstCopy = new List<T>();
foreach (var item in lst)
{
us...
What is the correct way to create a single-instance WPF application?
...s, it
brings on a lot of overhead, and I wanted something cleaner.
Knowing that I could use a mutex for this (but never having done it
before) I set out to cut down my code and simplify my life.
In the class of my application main I created a static named Mutex:
static class Program
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What is a monad?
...p(x => [x + 1])
Here we supply an operation which returns an Array, so now it conforms to the pattern. The flatMap method executes the provided function for every element in the array. It expects an array as result for each invocation (rather than single values), but merges the resulting set of...