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MySQL combine two columns into one column
... The SQL standard provides the CONCAT() function to concatenate two strings into a single string. SQLite, however, does not support the CONCAT() function. Instead, it uses the concatenate operator (||) to join two strings into one.
– PaulH
Oct 28 '19 at ...
How to use pull to refresh in Swift?
... {
super.viewDidLoad()
refreshControl.attributedTitle = NSAttributedString(string: "Pull to refresh")
refreshControl.addTarget(self, action: #selector(self.refresh(_:)), for: .valueChanged)
tableView.addSubview(refreshControl) // not required when using UITableViewController
}
@objc fu...
How to check if a file exists in a folder?
...ch (var fi in TXTFiles)
log.Info(fi.Exists);
or File.Exists Method:
string curFile = @"c:\temp\test.txt";
Console.WriteLine(File.Exists(curFile) ? "File exists." : "File does not exist.");
share
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How to force Chrome browser to reload .css file while debugging in Visual Studio?
...cated solutions, but a very easy, simple one is just to add a random query string to your CSS include.
Such as src="/css/styles.css?v={random number/string}"
If you're using php or another server-side language, you can do this automatically with time(). So it would be styles.css?v=<?=time();?&...
Check for column name in a SqlDataReader object
...taRecordExtensions
{
public static bool HasColumn(this IDataRecord dr, string columnName)
{
for (int i=0; i < dr.FieldCount; i++)
{
if (dr.GetName(i).Equals(columnName, StringComparison.InvariantCultureIgnoreCase))
return true;
}
...
GoogleTest: How to skip a test?
...e GTEST_FILTER
environment variable or the --gtest_filter flag to a filter string,
Google Test will only run the tests whose full names (in the form of
TestCaseName.TestName) match the filter.
The format of a filter is a ':'-separated list of wildcard patterns
(called the positive patterns) optional...
Use of def, val, and var in scala
... ^
When the class is defined like:
scala> class Person(val name: String, var age: Int)
defined class Person
and then instantiated with:
scala> def personA = new Person("Tim", 25)
personA: Person
an immutable label is created for that specific instance of Person (i.e. 'personA'). Wh...
How to call a function from a string stored in a variable?
I need to be able to call a function, but the function name is stored in a variable, is this possible? e.g:
16 Answers
...
Execute command on all files in a directory
...ail if there are no files present in the directory and an un-expanded glob string will be passed to the command to be run, which could have undesirable results. The bash shell provides an extended shell option for this using nullglob. So the loop basically becomes as follows inside the directory con...
Set attribute without value
...e attr() function is also a setter function. You can just pass it an empty string.
$('body').attr('data-body','');
An empty string will simply create the attribute with no value.
<body data-body>
Reference - http://api.jquery.com/attr/#attr-attributeName-value
attr( attributeName...