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Can I call memcpy() and memmove() with “number of bytes” set to zero?
...values, as described in 7.1.4. On such a call, a
function that locates a character finds no occurrence, a function that compares two
character sequences returns zero, and a function that copies characters copies zero
characters.
So the answer is no; the check is not necessary (or yes; you ca...
Initializing a member array in constructor initializer
...e about the following case, but some compilers do allow it.
struct A {
char foo[6];
A():foo("hello") { } /* valid? */
};
See this GCC PR for further details.
Do C++0x initializer lists solve the problem?
Yes, they do. However your syntax is invalid, I think. You have to use braces dir...
Retain precision with double in Java
...int things out in a slightly friendlier format, try java.util.Formatter or String.format. In the format string specify a precision less than the full precision of a double. To 10 significant figures, say, 11.399999999999 is 11.4, so the result will be almost as accurate and more human-readable in ca...
How to use the toString method in Java?
Can anybody explain to me the concept of the toString() method, defined in the Object class? How is it used, and what is its purpose?
...
Can I call a base class's virtual function if I'm overriding it?
... base->gogo1(7);
base->gogo2(7);
base->gogo3(7);
std::string s;
std::cout << "press any key to exit" << std::endl;
std::cin >> s;
return 0;
}
output
Derived
Derived :: gogo (int)
Derived :: gogo1 (int)
Derived :: gogo2 (int)
Derived :: gogo3 (in...
S3 Static Website Hosting Route All Paths to Index.html
I am using S3 to host a javascript app that will use HTML5 pushStates. The problem is if the user bookmarks any of the URLs, it will not resolve to anything. What I need is the ability to take all url requests and serve up the root index.html in my S3 bucket, rather than just doing a full redirect. ...
org.hibernate.MappingException: Could not determine type for: java.util.List, at table: College, for
...lution for exactly this problem, and adding @ElementCollection(targetClass=String.class) to my simple list of strings solved it.
– Angel O'Sphere
Jul 26 '19 at 10:50
add a com...
How can I read SMS messages from the device programmatically in Android?
...tent://sms/inbox") to read SMS which are in inbox.
// public static final String INBOX = "content://sms/inbox";
// public static final String SENT = "content://sms/sent";
// public static final String DRAFT = "content://sms/draft";
Cursor cursor = getContentResolver().query(Uri.parse("content://sms...
Merging dictionaries in C#
...a caveat: if the this T me dictionary was declared using new Dictionary<string, T>(StringComparer.InvariantCultureIgnoreCase) or something similar, the resulting dictionary will not retain the same behavior.
– João Portela
Jan 9 '14 at 14:51
...
Representing null in JSON
...son2 = '{"myCount": null}';
var json3 = '{"myCount": 0}';
var json4 = '{"myString": ""}';
var json5 = '{"myString": "null"}';
var json6 = '{"myArray": []}';
console.log(JSON.parse(json1)); // {}
console.log(JSON.parse(json2)); // {myCount: null}
console.log(JSON.parse(json3)); // {myCount: 0}
conso...