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为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...an application that uses the static libcurl library, you must
add -DCURL_STATICLIB to your CFLAGS. Otherwise the linker will look for
dynamic import symbols. If you get linker error like "unknown symbol
__imp__curl_easy_init ..." you have linked against the wrong (static)
library. If you...
How to tell Eclipse Workspace?
...ages simple list of last time opened workspaces which is stored as a RECENT_WORKSPACES key in org.eclipse.ui.ide.prefs file. The workspace name shown in this dialog is the first one from this list.
share
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Check if all elements in a list are identical
...for very large arrays, a native solution which optimizes away calls to obj.__eq__ when lhs is rhs, and out-of-order optimizations to allow short circuiting sorted lists more quickly.
– Glenn Maynard
Oct 2 '10 at 8:31
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How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
...ndex 2 because index 0 and 1 are reserved for hidden arguments "self" and "_cmd".
– Vishal Singh
May 15 '13 at 6:20
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How do I check if a string is a number (float)?
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It's not provided 'out of the box' because if is_number(s): x = float(x) else: // fail is the same number of lines of code as the try: x = float(x) catch TypeError: # fail. This utility function is an entirely unecessary abstraction.
– ovangle
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Python: changing value in a tuple
...nvert back, or construct a new tuple by concatenation.
In [1]: def replace_at_index1(tup, ix, val):
...: lst = list(tup)
...: lst[ix] = val
...: return tuple(lst)
...:
In [2]: def replace_at_index2(tup, ix, val):
...: return tup[:ix] + (val,) + tup[ix+1:]
...:
S...
How do I use extern to share variables between source files?
... is demonstrated by file3.h, file1.c and file2.c:
file3.h
extern int global_variable; /* Declaration of the variable */
file1.c
#include "file3.h" /* Declaration made available here */
#include "prog1.h" /* Function declarations */
/* Variable defined here */
int global_variable = 37; /* Def...
How do I join two lines in vi?
...ou join lines as is -- without adding or removing whitespaces:
S<Switch_ID>_F<File type>
_ID<ID number>_T<date+time>_O<Original File name>.DAT
Result:
S<Switch_ID>_F<File type>_ID<ID number>_T<date+time>_O<Original File name>.DAT
With...
mingw-w64 threads: posix vs win32
...helps someone else: The package g++-mingw-w64-x86-64 provides two files x86_64-w64-mingw32-g++-win32 and x86_64-w64-mingw32-g++-posix, and x86_64-w64-mingw32-g++ is aliased to one of them; see update-alternatives --display x86_64-w64-mingw32-g++.
– stewbasic
Fe...
Overriding fields or properties in subclasses
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You could do this
class x
{
private int _myInt;
public virtual int myInt { get { return _myInt; } set { _myInt = value; } }
}
class y : x
{
private int _myYInt;
public override int myInt { get { return _myYInt; } set { _myYInt = value; } }
}
virtual ...