大约有 41,000 项符合查询结果（耗时：0.0417秒） [XML]
What is the use of ByteBuffer in Java? [closed]
...
This is a good description of its uses and shortcomings. You essentially use it whenever you need to do fast low-level I/O. If you were going to implement a TCP/IP protocol or if you were writing a database (DBMS) this class would come in handy....
How to validate a url in Python? (Malformed or not)
...ost|' #localhost...
r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
r'(?::\d+)?' # optional port
r'(?:/?|[/?]\S+)$', re.IGNORECASE)
print(re.match(regex, "http://www.example.com") is not None) # True
print(re.match(regex, "example.com") is not None) # False
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Why can't I use float value as a template parameter?
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The current C++ standard does not allow float (i.e. real number) or character string literals to be used as template non-type parameters. You can of course use the float and char * types as normal arguments.
Perhaps the author is using a compiler that doesn't follow the current standard?
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How to enter quotes in a Java string?
...you didn't specify), but you should be able to "escape" the quotation mark character with a backslash: "\"ROM\""
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What is the worst gotcha in C# or .NET? [closed]
...Generic;
using System.Diagnostics;
class Test
{
static IEnumerable<char> CapitalLetters(string input)
{
if (input == null)
{
throw new ArgumentNullException(input);
}
foreach (char c in input)
{
yield return char.ToUpper(...
Reactjs convert html string to jsx
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By default, React escapes the HTML to prevent XSS (Cross-site scripting). If you really want to render HTML, you can use the dangerouslySetInnerHTML property:
<td dangerouslySetInnerHTML={{__html: this.state.actions}} />
React forces this intentionally-cumbersome syntax so that yo...
Parse (split) a string in C++ using string delimiter (standard C++)
...ollowing, you need add 2 not 1 due to the size of the delimiter which is 2 characters :) : std::string s = "scott>=tiger>=mushroom"; std::string delimiter = ">="; size_t last = 0; size_t next = 0; while ((next = s.find(delimiter, last)) != std::string::npos) { st...
C++及Windows异常处理(try，catch; __try,__finally, __except) - C/C++ - ...
...ss File_handle {
FILE* p;
public:
File_handle(const char* n, const char* a)
{ p = fopen(n,a); if (p==0) throw Open_error(errno); }
File_handle(FILE* pp)
{ p = pp; if (p==0) throw Open_error(errno); }
~File_handle() { fclose(p); }
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How can I add reflection to a C++ application?
...ld itself). This macro will be called like this:
REFLECTABLE
(
(const char *) name,
(int) age
)
So using Boost.PP we iterate over each argument and generate the data like this:
// A helper metafunction for adding const to a type
template<class M, class T>
struct make_const
{
ty...
What is RSS and VSZ in Linux memory management
...-in-c/7212248#7212248 */
void ProcStat_init(ProcStatm *result) {
const char* statm_path = "/proc/self/statm";
FILE *f = fopen(statm_path, "r");
if(!f) {
perror(statm_path);
abort();
}
if(7 != fscanf(
f,
"%lu %lu %lu %lu %lu %lu %lu",
&(...