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Concept of void pointer in C programming
... is there is any way of generalizing a function which can receive pointer and store it in void pointer and by using that void pointer we can make a generalized function..
You cannot just dereference it in a portable way, as it may not be properly aligned. It may be an issue on some architectures ...
Index of Currently Selected Row in DataGridView
...tCell property for the DataGridView.
datagridview.CurrentCell.RowIndex
Handle the SelectionChanged event and find the index of the selected row as above.
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Can we append to a {% block %} rather than overwrite?
...al.html" %}
Say you want to include a template in the middle of your page and you'd also like it to add some javascript in a block at the end of the page: calling block.super in the included template will crash.
Cf. Django issues #7324, #12008, #13399 and the related update to the documentation. Cf...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
...*a2) # note the asterisk
a2.unshift(*a1) # note the asterisk, and that a2 is the receiver
or splice:
a1[a1.length, 0] = a2
a1[a1.length..0] = a2
a1.insert(a1.length, *a2)
or append and flatten:
(a1 << a2).flatten! # a call to #flatten instead would return a new array
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How to start new activity on button click
In an Android application, how do you start a new activity (GUI) when a button in another activity is clicked, and how do you pass data between these two activities?
...
Using comparison operators in Scala's pattern matching system
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You can add a guard, i.e. an if and a boolean expression after the pattern:
a match {
case 10 => println("ten")
case x if x > 10 => println("greater than ten")
case _ => println("less than ten")
}
Edit: Note that this is more than...
How do I run a program with a different working directory from current, from Linux shell?
...our prompt of the parent shell, in the directory you started from.
Error handling: To avoid running the program without having changed the directory, e.g. when having misspelled /c, make the execution of helloworld conditional:
(cd /c && /a/helloworld)
Reducing memory usage: To avoid hav...
How do I detect IE 8 with jQuery?
... jQuery API Documentation. Check for Internet Explorer with $.browser.msie and then check its version with $.browser.version.
UPDATE: $.browser removed in jQuery 1.9
The jQuery.browser() method has been deprecated since jQuery 1.3 and is removed in 1.9. If needed, it is available as part of the...
Add a property to a JavaScript object using a variable as the name?
I'm pulling items out of the DOM with jQuery and want to set a property on an object using the id of the DOM element.
13...
Google fonts URL break HTML5 Validation on w3.org
... pipe character is unsafe: Other characters are unsafe because gateways and other transport agents are known to sometimes modify such characters. These characters are "{", "}", "|", "\", "^", "~", "[", "]", and "`".
– steveax
Oct 20 '17 at 4:37
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