大约有 44,000 项符合查询结果（耗时：0.0550秒） [XML]
SecurityError: Blocked a frame with origin from accessing a cross-origin frame
I am loading an <iframe> in my HTML page and trying to access the elements within it using Javascript, but when I try to execute my code, I get the following error:
...
Programmatically find the number of cores on a machine
...ine how many cores a machine has from C/C++ in a platform-independent way? If no such thing exists, what about determining it per-platform (Windows/*nix/Mac)?
...
Is there an MD5 Fixed Point where md5(x) == x?
...so have to be 128 bits long. Assuming that the MD5 sum of any string is uniformly distributed over all possible sums, then the probability that any given 128-bit string is a fixed point is 1/2128.
Thus, the probability that no 128-bit string is a fixed point is (1 − 1/2128)2128, so the probabili...
Python __str__ and lists
In Java, if I call List.toString(), it will automatically call the toString() method on each object inside the List. For example, if my list contains objects o1, o2, and o3, list.toString() would look something like this:
...
Where to place and how to read configuration resource files in servlet based application?
...properties file and access it when required. Is this a correct procedure, if so then where should I place this file? I am using Netbeans IDE which is having two separate folders for source and JSP files.
...
Write a program to find 100 largest numbers out of an array of 1 billion numbers
...et billionlog2(100) which is better than billionlog2(billion)
In general, if you need the largest K numbers from a set of N numbers, the complexity is O(NlogK) rather than O(NlogN), this can be very significant when K is very small comparing to N.
EDIT2:
The expected time of this algorithm is pre...
Local Storage vs Cookies
...
Cookies and local storage serve different purposes. Cookies are primarily for reading server-side, local storage can only be read by the client-side. So the question is, in your app, who needs this data — the client or the server?
If it's your client (you...
getting type T from IEnumerable
... gives you the FullName property which tells you the namespace.classname . If you are looking only for the class name use myEnumerable.GetType().GetGenericArguments()[0].Name
– user5534263
Jun 8 '16 at 14:49
...
Read data from SqlDataReader
...
If you use indexes like reader.GetString(0) will it use the first column you selected in your query or the firstt column on the table. I have a table with 3 columns in order: ID, Dir, Email. My command selects dir and emai...
Get all directories within directory nodejs
...
Note this breaks if there are symlinks in the directory. Use lstatSync instead.
– Dave
May 9 '17 at 0:37
...