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What does !! mean in ruby?
..., so it's usually best to let that convention stand.
Think of it as
!(!some_val)
One thing that is it used for legitimately is preventing a huge chunk of data from being returned. For example you probably don't want to return 3MB of image data in your has_image? method, or you may not want to r...
Creating a “logical exclusive or” operator in Java
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This escaped my memory too when I wrote my post, but I think you CAN use ^ as a logical operator (as well as bitwise).
– Neil Coffey
Apr 7 '09 at 17:06
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How can I do an UPDATE statement with JOIN in SQL Server?
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Syntax strictly depends on which SQL DBMS you're using. Here are some ways to do it in ANSI/ISO (aka should work on any SQL DBMS), MySQL, SQL Server, and Oracle. Be advised that my suggested ANSI/ISO method will typically be much slower than the other two methods, but if you're using a SQL D...
What's the difference between & and && in MATLAB?
...ND operator that employs short-circuiting behaviour. Short-circuiting just means the second operand (right hand side) is evaluated only when the result is not fully determined by the first operand (left hand side)
A & B (A and B are evaluated)
A && B (B is only evaluated if A is true)
...
Can an int be null in Java?
...ll to int in Java by casting it to Integer, for example if the check(root) method can return null then you can safely cast it to int by doing something like this: int data = (Integer)check(node);
– sactiw
Oct 11 '12 at 14:06
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Restoring state of TextView after screen rotation?
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<TextView
...
android:freezesText="true" />
From documentation on freezesText :
If set, the text view will include its current complete text inside of its frozen icicle in addition to meta-data such as the current cursor position. By default this is disabled; it can be usef...
C# SQL Server - Passing a list to a stored procedure
... items we passed in
SELECT l.Item FROM @list l;
END
Finally here's some sql to use it in c#:
using (var con = new SqlConnection(connstring))
{
con.Open();
using (SqlCommand cmd = new SqlCommand("exec sp_UseStringList @list", con))
{
using (var table = new DataTable()) {
...
婚庆O2O：领跑的企业也就只走到B轮 - 资讯 - 清泛网 - 专注C/C++及内核技术
...儿有七大姑八大姨加入进来时，就成了……“Will you marry me？”
“Yes，I Do！”
七个单词，可能要花费20多年才能找到一个一起对话的人。但也有人一辈子只能在电影里看看。可是，当结婚这个神圣的大事儿有七大姑八大姨加入...
How to customize ?
...much about the input[type=file] control itself.
Since clicking a label element correctly paired with an input will activate/focus it, we can use a label to trigger the OS browse dialog.
Here is how you can do it…
label {
cursor: pointer;
/* Style as you please, it will become the v...
In Angular, I need to search objects in an array
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I know if that can help you a bit.
Here is something I tried to simulate for you.
Checkout the jsFiddle ;)
http://jsfiddle.net/migontech/gbW8Z/5/
Created a filter that you also can use in 'ng-repeat'
app.filter('getById', function() {
return function(input, id) {...