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Django. Override save for model
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You may supply extra argument for confirming a new image is posted.
Something like:
def save(self, new_image=False, *args, **kwargs):
if new_image:
small=rescale_image(self.image,width=100,height=100)
self.image_small=S...
How to disable anchor “jump” when loading a page?
...identical to tab names/href values) to my nav links. I ended up adding a 1-char suffix to my tabs, and then substringing the values by 1 char (str.slice(0,-1) when comparing them to window.location.hash This way the hashes are different and no jumping occurs.
– developer10
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SQL SERVER: Get total days between two dates
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It also proceeds datetime and datetime2 like a charm as I can see in my results.
– Honza P.
Feb 28 at 8:40
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c语言字符串常量内容是否可以通过指针修改 - C/C++ - 清泛网 - 专注C/C++及内核技术
...是：不行。尝试修改的话，运行时程序会崩溃。int main(){ char str1[40]="hello world!"; char *str1="hello world!"...答案是：不行。尝试修改的话，运行时程序会崩溃。
int main()
{
char str1[40]="hello world!"; //char *str1="hello world!";
str1[4]...
AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...不仅限于模块分配新的地址。
Example
// Allocate a 5 character array, which should have a valid memory address.
char* arr = new char[5];
// Create a null pointer, which should be an invalid memory address.
char* null = (char*)0x0;
ASSERT(AfxIsValidAddress(arr, 5));
ASSER...
c/c++如何判断指针无效？如NULL,0xcccccccc,0xfeeefeee,野指针等 - C/C++ -...
...何判断指针是否有效呢？
AfxIsValidAddress
// Allocate a 5 character array, which should have a valid memory address.
char* arr = new char[5];
// Create a null pointer, which should be an invalid memory address.
char* null = (char*)0x0;
ASSERT(AfxIsValidAddress(arr, 5));
ASSE...
C/C++获取Windows的CPU、内存、硬盘使用率 - C/C++ - 清泛网 - 专注C/C++及内核技术
...icalDriveStrings()函数获取所有驱动器字符串信息长度。
char* DStr = new char[DSLength];//用获取的长度在堆区创建一个c风格的字符串数组
GetLogicalDriveStrings(DSLength, (LPTSTR)DStr);
//通过GetLogicalDriveStrings将字符串信息复制到堆区数...
【解决】munmap_chunk(): invalid pointer - C/C++ - 清泛网 - 专注C/C++及内核技术
...指针被覆盖掉了，然后delete free就会报这个错误。例如：char* word = (char*)malloc(10);word = "abc"; 应使用 strcpy(word, "abc");free(word) 原因：new/malloc出来的指针被覆盖掉了，然后delete/free就会报这个错误。
例如：
char* word = (char*)malloc(1...
In-memory size of a Python structure
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@AlexMartelli Hi Alex! .. Why minimum size of a char in python is 25 bytes. >>> getsizeof('a') gives 25 and >>> getsizeof('ab') gives 26 `
– Grijesh Chauhan
Jan 17 '13 at 5:13
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Can I use a collection initializer for Dictionary entries?
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var names = new Dictionary<int, string> {
{ 1, "Adam" },
{ 2, "Bart" },
{ 3, "Charlie" }
};
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