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boost Composite keys - C/C++ - 清泛网 - 专注C/C++及内核技术
...lly taken care of: boost::hash is specialized to hash a composite key as a function of the boost::hash values of its elements. Should we need to specify different hash functions for the elements of a composite key, we can explicitly do so by using the composite_key_hash utility:
struct tuned_i...
How to disable copy/paste from/to EditText
...
I am able to disable copy-and-paste functionality with the following:
textField.setCustomSelectionActionModeCallback(new ActionMode.Callback() {
public boolean onCreateActionMode(ActionMode actionMode, Menu menu) {
return false;
}
public ...
Truncate (not round) decimal places in SQL Server
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select round(123.456, 2, 1)
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How to remove text from a string?
I've got a data-123 string.
11 Answers
11
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Validate phone number with JavaScript
...fectly. It validates that the phone number is in one of these formats:
(123) 456-7890 or 123-456-7890
26 Answers
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boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...#include <vector>
#include "boost/lambda/lambda.hpp"
#include "boost/function.hpp"
Course::Course( unsigned int num, unsigned int hour, std::string name ) :
course_num(num),
course_hour(hour),
course_name(name)
{
}
Student::Student( unsigned int num, const std:...
Python's equivalent of && (logical-and) in an if-statement
...lt, then the second operator isn't evaluated at all.
To show this I use a function that simply takes a value, prints it and returns it again. This is handy to see what is actually
evaluated because of the print statements:
>>> def print_and_return(value):
... print(value)
... retu...
What are all the uses of an underscore in Scala?
...s
List(1, 2, 3) foreach println _
Converting call-by-name parameters to functions
def toFunction(callByName: => Int): () => Int = callByName _
Default initializer
var x: String = _ // unloved syntax may be eliminated
There may be others I have forgotten!
Example showing why foo(_...
Permutations in JavaScript?
I'm trying to write a function that does the following:
35 Answers
35
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Determine when a ViewPager changes pages
...geListener(object : ViewPager.OnPageChangeListener {
override fun onPageScrollStateChanged(state: Int) {
}
override fun onPageScrolled(position: Int, positionOffset: Float, positionOffsetPixels: Int) {
}
override fun onPageSelected(posi...