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Is it possible to iterate through JSONArray? [duplicate]
...
Not with an iterator.
For org.json.JSONArray, you can do:
for (int i = 0; i < arr.length(); i++) {
arr.getJSONObject(i);
}
For javax.json.JsonArray, you can do:
for (int i = 0; i < arr.size(); i++) {
arr.getJsonObject(i);
}
...
Declare a block method parameter without using a typedef
...eter in Objective-C without using a typedef? It must be, like function pointers, but I can't hit on the winning syntax without using an intermediate typedef:
...
What is the difference between @PathParam and @QueryParam
... @Path("/query")
public Response getUsers(
@QueryParam("from") int from){
}}
To achieve the same using Spring, you can use
@PathVariable(Spring) == @PathParam(Jersey, JAX-RS),
@RequestParam(Spring) == @QueryParam(Jersey, JAX-RS)
...
How to add not null constraint to existing column in MySQL
...
Just use an ALTER TABLE... MODIFY... query and add NOT NULL into your existing column definition. For example:
ALTER TABLE Person MODIFY P_Id INT(11) NOT NULL;
A word of caution: you need to specify the full column definition again when using a MODIFY query. If your column has, for...
Extracting double-digit months and days from a Python date [duplicate]
...In [2]: d = datetime.date.today()
In [3]: type(d.month)
Out[3]: <type 'int'>
In [4]: type(d.day)
Out[4]: <type 'int'>
Both are integers. So there is no automatic way to do what you want. So in the narrow sense, the answer to your question is no.
If you want leading zeroes, you'll h...
scoped_ptr 与 auto_ptr 与 shared_ptr 区别总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
}
~Foo()
{
std::cout<<"destroy Foo()"<<std::endl;
}
void print()
{
std::cout<<"Foo::print"<<std::endl;
}
int i;
};
void OutSharePtr(shared_ptr<Foo> &P)
{
Foo* p = new Foo();
shared_ptr<Foo> sp1(p);
std::cout<<sp1.use_count()<<"::"<<sp1.get()<<std::endl;
shared...
boost自定义composite_key_compare比较函数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...Index { };
struct TParamValidIndex { };
struct customize_compare
{
int operator()(const IDType l, const IDType r)const
{
// specially compare for this application
return strcmp(l, r);
}
};
typedef multi_index_container<
TParam_p,
indexed_by<
ordered_unique< tag<T...
解决：Run-Time Check Failure #0，The value of ESP was not properly sav...
... calling a function declared with one calling convention with a function pointer declared with a different calling convention.
错误原因：
你定义函数指针原型时出错。
其实你定义的没有错，但是编译器不认识而已，因为你调用的dll函数是一个远函数，而...
LVN_ITEMCHANGED通知会响应多次的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
... pNMListView->uChanged && (pNMListView->uNewState & LVIS_SELECTED))
{
int nItem = pNMListView->iItem;
if(-1 != nItem)
{
int nSubItem = pNMListView->iSubItem;
CString str;
static int i = 0;
str.Format(_T("Index: %d, item: %d, subitem: %d"), i++, nItem, nSubItem);
GetPar...
mfc从CImageList中获取CBitmap位图对象 - C/C++ - 清泛网 - 专注C/C++及内核技术
...map位图对象
void GetListImage(CImageList &ImageList, CBitmap &Bitmap, int nImageIdx)
{
CClientDC dcClient(NULL);
IMAGEINFO ImageInfo;
ImageList.GetImageInfo(nImageIdx, &ImageInfo);
int nWidth = abs(ImageInfo.rcImage.right - ImageInfo.rcImage.left);
int nHeight = abs(Ima...