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how to convert from int to char*?
...
In C++17, use std::to_chars as:
std::array<char, 10> str;
std::to_chars(str.data(), str.data() + str.size(), 42);
In C++11, use std::to_string as:
std::string s = std::to_string(number);
char const *pchar = s.c_str(); //use char const* ...
Typedef function pointer?
...ef definition before compiling the actual code.
Example:
typedef int (*t_somefunc)(int,int);
int product(int u, int v) {
return u*v;
}
t_somefunc afunc = &product;
...
int x2 = (*afunc)(123, 456); // call product() to calculate 123*456
...
Find document with array that contains a specific value
...MyArrayOfSubDocuments': { $not: { $size: 0 } },
'MyArrayOfSubDocuments._id': { $exists: false }
})
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What does the explicit keyword mean?
...eter constructor, can be used as an implicit conversion
Foo (int foo) : m_foo (foo)
{
}
int GetFoo () { return m_foo; }
private:
int m_foo;
};
Here's a simple function that takes a Foo object:
void DoBar (Foo foo)
{
int i = foo.GetFoo ();
}
and here's where the DoBar function is cal...
How do I view events fired on an element in Chrome DevTools?
...me.
Right click on the element and open 'Chrome Developer Tools'
Type $._data(($0), 'events'); in the 'Console'
Expand the attached objects and double click the handler: value.
This shows the source code of the attached function, search for part of that using the 'Search' tab.
And it's time to ...
Automating “enter” keypresses for bash script generating ssh keys
...e - it changes the questions to confirm you want to overwrite the existing _rsa keyfile (so a y or n needs to be supplied)
– Rudu
Sep 8 '10 at 13:23
...
How can one print a size_t variable portably using the printf family?
I have a variable of type size_t , and I want to print it using printf() . What format specifier do I use to print it portably?
...
TortoiseGit save user authentication / credentials
...name and password every time you do a pull or push.
Create a file called _netrc with the following contents:
machine github.com
login yourlogin
password yourpassword
Copy the file to C:\Users\ (or another location; this just happens to be where I’ve put it)
Go to command prompt, type setx hom...
Why can't I have “public static const string S = ”stuff"; in my Class?
...atic-ly, you can do:
class MyClass
{
private const int myLowercase_Private_Const_Int = 0;
public const int MyUppercase_Public_Const_Int = 0;
/*
You can have the `private const int` lowercase
and the `public int` Uppercase:
*/
public int MyLowercase_Priv...
How to check if a symlink exists
... difference between -L and -h ? in my bash ( version 4.2.53(1)-release (x86_64-redhat-linux-gnu ) man bash is identical for both -L and -h and they behave the same, ie they check that file actualy is a link and don't care whether the linked to file exists or not.
– philippe lha...