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How to convert std::string to LPCSTR?
...
std::string myString("SomeValue");
LPSTR lpSTR = const_cast<char*>(myString.c_str());
myString is the input string and lpSTR is it's LPSTR equivalent.
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Get top n records for each group of grouped results
...ould need to specify the group number and add queries for each group:
(
select *
from mytable
where `group` = 1
order by age desc
LIMIT 2
)
UNION ALL
(
select *
from mytable
where `group` = 2
order by age desc
LIMIT 2
)
There are a variety of ways to do this, see this articl...
JComboBox Selection Change Listener?
...istener() will work, too. You may get 2 ItemEvents, though, one for the deselection of the previously selected item, and another for the selection of the new item. Just don't use both event types!
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Can't operator == be applied to generic types in C#?
...gt;.Default.Equals(x, y);
}
Aside from anything else, this avoids boxing/casting.
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Remove Select arrow on IE
I have select element, i want to remove the arrow, then i can add other icon..
i can do that for Firefox Safari and Chrome,
but this didn't work on IE9 .
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Are C++ enums signed or unsigned?
...ssible. If you want to guarantee a certain behaviour in your code, why not cast the enum member you use in the expression?
– ysap
Feb 9 '18 at 12:42
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How to change options of with jQuery?
Suppose a list of options is available, how do you update the <select> with new <option> s?
9 Answers
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How to select an option from drop down using Selenium WebDriver C#?
I was trying for my web test selecting an option. An example can be found here: http://www.tizag.com/phpT/examples/formex.php
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Trigger change event of dropdown
...wns, the best way to do it is to have a script that returns the a prebuilt select box and an AJAX call that requests it.
Here is the documentation for jQuery's Ajax method if you need it.
$(document).ready(function(){
$('#countrylist').change(function(e){
$this = $(e.target);
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Rails 3: Get Random Record
...You can use the following trick on an indexed column (PostgreSQL syntax):
select *
from my_table
where id >= trunc(
random() * (select max(id) from my_table) + 1
)
order by id
limit 1;
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