specifications

Don't allow a specific use of characters

由 廉价感情. 提交于 2019-12-09 04:03:09
问题 I bumped into a problem, i hope someone can help me out :) I got a TextBox, and i want to limit users, so that they can't write multiple \ one after another. I'm using it for folders. For instance: C\temp\test\ Now I want to prevent input like: C\temp\test\\\ I've tried searching around for this problem, but I couldn't find anything like this, so I hope it's possible :) I don't really have any code to show, but here's the code for my TextBox: private void textBox1_TextChanged(object sender,

When are temporaries created as part of a function call destroyed?

由 我们两清 提交于 2019-12-08 23:35:55
问题 Is a temporary created as part of an argument to a function call guaranteed to stay around until the called function ends, even if the temporary isn't passed directly to the function? There's virtually no chance that was coherent, so here's an example: class A { public: A(int x) : x(x) {printf("Constructed A(%d)\n", x);} ~A() {printf("Destroyed A\n");} int x; int* y() {return &x;} }; void foo(int* bar) { printf("foo(): %d\n", *bar); } int main(int argc, char** argv) { foo(A(4).y()); } If A(4)

XML Spec and UTF-16

由 雨燕双飞 提交于 2019-12-08 17:19:00
问题 Section 4.3.3 and Appendix F of the XML 1.0 spec speak about UTF-16, the byte order mark (BOM) in UTF-16 encoded data streams, and the XML encoding declaration. From the information in those sections, it would seem that a byte order mark is required in UTF-16 documents. But the summary chart in Appendix F gives a scenario where a UTF-16 input does not have a Byte order mark, but this scenario has an xml declaration. According to section 4.3.3, a UTF-16 encoded document does not require an

Which HTML elements can't contain child nodes?

由 本秂侑毒 提交于 2019-12-08 15:13:36
问题 I've been looking for an exhaustive list, but can't find one anywhere. To avoid having to trawl through the specs, does anyone know what they are (and I suppose a complementary list of elements that can contain children would be useful too). And how much does this list vary between XHTML 1 and HTML5? 回答1: You can find a list of void elements (elements that cannot have any child conents) in the HTML5 spec. With the exception of the new elements introduced in HTML5, the list of void elements in

Why can’t I have a <table> inside an <h2>?

由 时光总嘲笑我的痴心妄想 提交于 2019-12-08 12:54:32
问题 I would like to understand what is wrong with this: <body> <h2> <table> <tr> <td> Text</td> </tr> </table> </h2> </body> Validator complains: document type does not allow element "table" here; missing one of "object", "ins", "del", "map", "button" start-tag Further explanation says: The mentioned element is not allowed to appear in the context in which you've placed it; the other mentioned elements are the only ones that are both allowed there and can contain the element mentioned. This might

Go method call shorthand spec applicability

由 纵然是瞬间 提交于 2019-12-08 07:41:06
问题 From the Calls section of Go spec: https://golang.org/ref/spec#Calls A method call x.m() is valid if the method set of (the type of) x contains m and the argument list can be assigned to the parameter list of m . If x is addressable and &x 's method set contains m , x.m() is shorthand for (&x).m() My program. package main import ( "fmt" ) func main() { p := Point{2, 3} p.FakeScale(10) fmt.Println(p) p.RealScale(10) fmt.Println(p) } type Point struct { x int y int } func (p Point) FakeScale(s

How backwards compatible are EJB containers?

由 为君一笑 提交于 2019-12-08 07:17:34
问题 I have inherited an application that is running on JBoss 2.4.3 (which I believe is EJB spec 2.0 compatible), and I'm running into quite a few issues (like being able to use modern log4j "Logger" apis [JBoss 2.4 specific issues pushing me to upgrade]). I understand that I should be able to use a EJB 2.1 container (Jboss 4) without issue, but should I expect to be able to go further? What are the backwards compatibility requirements for EJB? Are they meant to be backwards compatible through

Interpretation of “background colour index” in GIF specification

由 ☆樱花仙子☆ 提交于 2019-12-08 05:43:44
问题 If you look in the GIF specification and search for "Background Color Index", you see the following description: vii) Background Color Index - Index into the Global Color Table for the Background Color. The Background Color is the color used for those pixels on the screen that are not covered by an image. If the Global Color Table Flag is set to (zero), this field should be zero and should be ignored. There is an ambiguity here, which is that if the "Global Color Table Flag" is set to zero

JPA: left join without @OneToMany annotations

由 不想你离开。 提交于 2019-12-08 04:33:10
问题 I have a OneToMany relationship in my DB but I don't want that Hibernate manages it directly. This relationships are translations, but a DTO represents itself a translated registry: @Entity @Table(name = "my_table") public class MyTable { @Id @Column(name = "id", nullable = false, unique = true) private Integer id; @Transient private String lang; @Transient private String text; // getters and setters ... } @Entity @Table(name = "my_table_translation") public class MyTableTranslation { @Id

HTML Validator “self-closing syntax” and “non-void” errors

由 China☆狼群 提交于 2019-12-07 18:02:13
问题 I am having trouble validating my code with W3 Validator. I am new to Web Design. Can someone help me. The Validator states: Error: Self-closing syntax (/>) used on a non-void HTML element. Ignoring the slash and treating as a start tag. From line 15, column 1; to line 15, column 41 p>↩↩↩<h1>↩<a href="http://www.monroecollege.edu:"/><img s Code: <!DOCTYPE HTML> <html> <head> <meta charset="utf-8"> <title>Home-International Student Home Page</title> <link href="cssstyle.css" rel="stylesheet">
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