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How to use the TextWatcher class in Android?
...extWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
// TODO Auto-generated method ...
Performance of Arrays vs. Lists
Say you need to have a list/array of integers which you need iterate frequently, and I mean extremely often. The reasons may vary, but say it's in the heart of the inner most loop of a high volume processing.
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How do I create ColorStateList programmatically?
...rs for disabled, unfocused, unchecked states etc. just negate the states:
int[][] states = new int[][] {
new int[] { android.R.attr.state_enabled}, // enabled
new int[] {-android.R.attr.state_enabled}, // disabled
new int[] {-android.R.attr.state_checked}, // unchecked
new int[] { a...
The most efficient way to implement an integer based power function pow(int, int)
What is the most efficient way given to raise an integer to the power of another integer in C?
17 Answers
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error C2440: “初始化”: 无法从“const int”转换为“int &” - C/C++ - ...
error C2440: “初始化”: 无法从“const int”转换为“int &”error C2440: 初始化: 无法从const int转换为int &转换丢失限定符。#include <iostream> int main() { const int...error C2440: “初始化”: 无法从“const int”转换为“int &”
转换丢失限定...
How do I sort a vector of pairs based on the second element of the pair?
...t to std::sort)
struct sort_pred {
bool operator()(const std::pair<int,int> &left, const std::pair<int,int> &right) {
return left.second < right.second;
}
};
std::sort(v.begin(), v.end(), sort_pred());
If you're using a C++11 compiler, you can write the sam...
What is the difference between a definition and a declaration?
...
A declaration introduces an identifier and describes its type, be it a type, object, or function. A declaration is what the compiler needs to accept references to that identifier. These are declarations:
extern int bar;
extern int g(int,...
In c# is there a method to find the max of 3 numbers?
Like Math.Max but takes 3 or params of int?
10 Answers
10
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How does collections.defaultdict work?
...and type objects). For the first example, default items are created using int(), which will return the integer object 0. For the second example, default items are created using list(), which returns a new empty list object.
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How to subtract date/time in JavaScript? [duplicate]
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You can use getTime() method to convert the Date to the number of milliseconds since January 1, 1970. Then you can easy do any arithmetic operations with the dates. Of course you can convert the number back to the Date with setTime(). See here an example.
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