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How do I check whether a checkbox is checked in jQuery?
...sting code, you could therefore do this:
if(document.getElementById('isAgeSelected').checked) {
$("#txtAge").show();
} else {
$("#txtAge").hide();
}
However, there's a much prettier way to do this, using toggle:
$('#isAgeSelected').click(function() {
$("#txtAge").toggle(this.che...
What are good alternatives to SQL (the language)? [closed]
... way in which you use SQL", because SQL, is not truly relational. Example: SELECT Sum(foo) BAR Blah WHERE 1=0. SQL returns null, 100% relational demands a zero. carfield.com.hk/document/misc/SQL_Problems.pdf
– McKay
Oct 28 '10 at 19:53
...
Replace only text inside a div using jquery
...t(*)')[1].nodeValue = '"Hi I am replace"';
$('#one').contents(':not(*)') selects non-element child nodes in this case text nodes and the second node is the one we want to replace.
http://jsfiddle.net/5rWwh/1/
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Polymorphism in C++
...egorise them in various ways:
When is the polymorphic type-specific code selected?
Run time means the compiler must generate code for all the types the program might handle while running, and at run-time the correct code is selected (virtual dispatch)
Compile time means the choice of type-specif...
Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
... 1
end
print("sum =",sum)复制代码
if-else分支
if age == 40 and sex =="Male" then
print("男人四十一枝花")
elseif age > 60 and sex ~="Female" then
print("old man without country!")
elseif age < 20 then
&nb...
Why does this async action hang?
...DBConnection.ExecuteAsync<ResultClass>(
ds => ds.Execute("select slow running data into result"));
}
What's the difference? There's now no awaiting anywhere, so nothing being implicitly scheduled to the UI thread. For simple methods like these that have a single return, there's no...
SQL, Postgres OIDs, What are they and why are they useful?
...ned system column oid will no longer be invisible by default. Performing a SELECT * will now include this column. Note that this extra “surprise” column may break naïvely written SQL code.
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Does PHP have threading?
...
From the PHP manual for the pthreads extension:
pthreads is an Object Orientated API that allows user-land multi-threading in PHP. It includes all the tools you need to create multi-threaded applications targeted at the W...
How do I create a unique constraint that also allows nulls?
...dy found separately in other, properly defined columns. It should never be selected or used.
So, my story is that this is not a surrogate NULL, and I'm sticking to it! Since we don't actually want the non-NULL value for any purpose other than to trick the UNIQUE index to ignore NULLs, our use case ...
iOS 6 apps - how to deal with iPhone 5 screen size? [duplicate]
...etina quality - there's no backward compatibility here :)
You could also select this image from within Xcode. Go to the target, and under the Summary section, look for Launch Images. The image has to be 640x1136 pixels in size. Here's a screenshot of where to find it, if that helps.
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