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How do I scroll the UIScrollView when the keyboard appears?
...ationCenter.default.addObserver(self, selector: #selector(onKeyboardAppear(_:)), name: NSNotification.Name.UIKeyboardDidShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(onKeyboardDisappear(_:)), name: NSNotification.Name.UIKeyboardDidHide, object: nil)
}
// Do...
Why should eval be avoided in Bash, and what should I use instead?
...than eval if you want to do something more complex:
# Add to scenario:
VAR_2='4 5 6'
# We could use:
local ref="${REF}_2"
echo "${!ref}"
# Versus the bash < 2 method, which might be simpler to those accustomed to eval:
eval "echo \"\$${REF}_2\""
Regardless, the new method is more intuitive, ...
How can jQuery deferred be used?
...he new Deferred object and the attached methods .when , .Deferred and ._Deferred .
11 Answers
...
receiver type *** for instance message is a forward declaration
...wered Jan 11 '12 at 6:47
Catfish_ManCatfish_Man
38.6k1111 gold badges6363 silver badges8181 bronze badges
...
How can I prevent SQL injection in PHP?
...ction->prepare('SELECT * FROM employees WHERE name = ?');
$stmt->bind_param('s', $name); // 's' specifies the variable type => 'string'
$stmt->execute();
$result = $stmt->get_result();
while ($row = $result->fetch_assoc()) {
// Do something with $row
}
If you're connecting...
How do I pass a variable by reference?
...le type
Let's try to modify the list that was passed to a method:
def try_to_change_list_contents(the_list):
print('got', the_list)
the_list.append('four')
print('changed to', the_list)
outer_list = ['one', 'two', 'three']
print('before, outer_list =', outer_list)
try_to_change_list_...
Python argparse ignore unrecognised arguments
...
Replace
args = parser.parse_args()
with
args, unknown = parser.parse_known_args()
For example,
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--foo')
args, unknown = parser.parse_known_args(['--foo', 'BAR', 'spam'])
prin...
How do you access the matched groups in a JavaScript regular expression?
...an access capturing groups like this:
var myString = "something format_abc";
var myRegexp = /(?:^|\s)format_(.*?)(?:\s|$)/g;
var match = myRegexp.exec(myString);
console.log(match[1]); // abc
And if there are multiple matches you can iterate over them:
var myString = "something f...
How to loop through all the properties of a class?
... given by Brannon:
Public Sub DisplayAll(ByVal Someobject As Foo)
Dim _type As Type = Someobject.GetType()
Dim properties() As PropertyInfo = _type.GetProperties() 'line 3
For Each _property As PropertyInfo In properties
Console.WriteLine("Name: " + _property.Name + ", Value: "...
How can I use numpy.correlate to do autocorrelation?
...elation used to in statistics? en.wikipedia.org/wiki/Autocorrelation#Signal_processing
– Daniel says Reinstate Monica
Jan 24 '18 at 3:31
...