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How to access parent Iframe from JavaScript
Well, I have an IFrame, which calls a same domain page.
My problem is that I want to access some information from this parent Iframe from this called page (from JavaScript). How can I access this Iframe?
...
Array Size (Length) in C#
...
If it's a one-dimensional array a,
a.Length
will give the number of elements of a.
If b is a rectangular multi-dimensional array (for example, int[,] b = new int[3, 5];)
b.Rank
will give the number of dimensions (2) an...
What are the pros and cons of performing calculations in sql vs. in your application
...that scales out; rather than a db server, which scales up)
volume of data (if you need to access/aggregate a lot of data, doing it at the db server will save bandwidth, and disk io if the aggregates can be done inside indexes)
convenience (sql is not the best language for complex work - especially n...
Type.GetType(“namespace.a.b.ClassName”) returns null
...
Type.GetType("namespace.qualified.TypeName") only works when the type is found in either mscorlib.dll or the currently executing assembly.
If neither of those things are true, you'll need an assembly-qualified name:
Type.GetType("namespace.qualified.T...
C++11 range based loop: get item by value or reference to const
...
If you don't want to change the items as well as want to avoid making copies, then auto const & is the correct choice:
for (auto const &x : vec)
Whoever suggests you to use auto & is wrong. Ignore them.
Here i...
How do I sort strings alphabetically while accounting for value when a string is numeric?
...
Pass a custom comparer into OrderBy. Enumerable.OrderBy will let you specify any comparer you like.
This is one way to do that:
void Main()
{
string[] things = new string[] { "paul", "bob", "lauren", "007", "90", "101"};
foreach (var thing in things.OrderBy(x => x, new SemiNumericCom...
How to check whether a string is a valid HTTP URL?
...ut uriResult)
&& uriResult.Scheme == Uri.UriSchemeHttp;
Or, if you want to accept both HTTP and HTTPS URLs as valid (per J0e3gan's comment):
Uri uriResult;
bool result = Uri.TryCreate(uriName, UriKind.Absolute, out uriResult)
&& (uriResult.Scheme == Uri.UriSchemeHttp || ...
What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...ber, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the receiver has loaded a class for the object that has a different serialVersi...
What's the advantage of Logic-less template (such as mustache)?
...e, which made refactoring much harder, since you had your code scattered.
If you prevent logic in templates by design (like mustache does), you will be obliged to put the logic elsewhere, so your templates will end up uncluttered.
Another advantage is that you are forced to think in terms of separ...
App Inventor 2 手势识别扩展教程 - GestureDetector · App Inventor 2 中文网
...方向判断
var dX = 终点X - 起点X
var dY = 终点Y - 起点Y
if abs(dX) > abs(dY) {
if dX > 0 {
标签_状态.Text = "👉 右滑"
} else {
标签_状态.Text = "👈 左滑"
}
} else {
if dY > 0 {
标签_状态.Text = "👇 下滑"
} else {
...