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boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...site_key, as shown in the example:
struct phonebook_entry
{
std::string family_name;
std::string given_name;
std::string phone_number;
phonebook_entry(
std::string family_name,
std::string given_name,
std::string phone_number):
family_name(family_name),given_...
How to read a local text file?
...
But how can you use the text and put it into a string variable for use elsewhere? (I keep on getting 'undefined' no matter what I do to it.)
– not2qubit
Feb 8 '18 at 8:03
...
Date query with ISODate in mongodb doesn't seem to work
... The mongo shell provides various methods to return the date, either as a string or as a Date object:
Date() method which returns the current date as a string.
new Date() constructor which returns a Date object using the ISODate() wrapper.
ISODate() constructor which returns a Date obje...
Does Java support default parameter values?
...ys to simulate default parameters in Java:
Method overloading.
void foo(String a, Integer b) {
//...
}
void foo(String a) {
foo(a, 0); // here, 0 is a default value for b
}
foo("a", 2);
foo("a");
One of the limitations of this approach is that it doesn't work if you have two optional ...
How to split a long regular expression into multiple lines in JavaScript?
...
You could convert it to a string and create the expression by calling new RegExp():
var myRE = new RegExp (['^(([^<>()[\]\\.,;:\\s@\"]+(\\.[^<>(),[\]\\.,;:\\s@\"]+)*)',
'|(\\".+\\"))@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\....
What is an Intent in Android?
...);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
share
|
...
Creating rounded corners using CSS [closed]
... manage to support anti-aliasing. There are also ways of using these sans extra markup, you can implement with a class and then the markup is added dynamically to the classed elements. That said, the more I use them the more you seem right...they're useful for prototyping but add a lot of extra we...
Create nice column output in python
...
Since Python 2.6+, you can use a format string in the following way to set the columns to a minimum of 20 characters and align text to right.
table_data = [
['a', 'b', 'c'],
['aaaaaaaaaa', 'b', 'c'],
['a', 'bbbbbbbbbb', 'c']
]
for row in table_data:
...
How do you dynamically add elements to a ListView on Android?
...use.
public class ListViewDemo extends ListActivity {
//LIST OF ARRAY STRINGS WHICH WILL SERVE AS LIST ITEMS
ArrayList<String> listItems=new ArrayList<String>();
//DEFINING A STRING ADAPTER WHICH WILL HANDLE THE DATA OF THE LISTVIEW
ArrayAdapter<String> adapter;
...
What is the copy-and-swap idiom?
...
std::swap(this_string, that) doesn't provide a no-throw guarantee. It provides strong exception safety, but not a no-throw guarantee.
– wilhelmtell
Dec 22 '10 at 14:59
...