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How to navigate through a vector using iterators? (C++)
...lt;string>::iterator it; // declare an iterator to a vector of strings
int n = 3; // nth element to be found.
int i = 0; // counter.
// now start at from the beginning
// and keep iterating over the element till you find
// nth element...or reach the end of vector.
for(it = myvector.begin(); ...
Measuring execution time of a function in C++
...r( long long i = 0; i != 2000000; ++i )
{
number += 5;
}
}
int main()
{
auto t1 = std::chrono::high_resolution_clock::now();
function();
auto t2 = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::microseconds>( ...
How to escape double quotes in JSON
...Tag wird ein neues Reiseziel angesteuert bis wir.
A second encoding then converts it again, escaping the already escaped characters:
FROM: Heute startet unsere Rundreise \"Example text\". Jeden Tag wird ein neues Reiseziel angesteuert bis wir.
TO: Heute startet unsere Rundreise \\\"Example text\...
How do I access call log for android?
...on = c.getString(c.getColumnIndex(CallLog.Calls.DURATION));// for duration
int type = Integer.parseInt(c.getString(c.getColumnIndex(CallLog.Calls.TYPE)));// for call type, Incoming or out going.
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In C++, is it still bad practice to return a vector from a function?
... "compiler does it anyway": compiler isn't required to do that == uncertainty == bad idea (need 100% certainty). "comprehensive analysis"There is a huge problem with that analysis - it relies on undocumented/non-standard language features in unknown compiler ("Although copy elision is never requir...
How do I reverse a C++ vector?
...der for this purpose.
#include <vector>
#include <algorithm>
int main() {
std::vector<int> a;
std::reverse(a.begin(), a.end());
return 0;
}
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C/C++中的段错误（Segmentation fault） - C/C++ - 清泛网 - 专注C/C++及内核技术
...护，而不能任意访问。
例子1：
Code:
#include <stdio.h>
int main(){
int i=0;
scanf("%d",i);
printf("%d\n",i);
return 0;
}
编译和执行一下
$ gcc -o segerr segerr.c
$ ./segerr
10
段错误
咋一看，好像没有问题...
How can I read SMS messages from the device programmatically in Android?
...esult to prevent exception
do {
String msgData = "";
for(int idx=0;idx<cursor.getColumnCount();idx++)
{
msgData += " " + cursor.getColumnName(idx) + ":" + cursor.getString(idx);
}
// use msgData
} while (cursor.moveToNext());
} else {
// em...
Split string every nth character?
...
i was being serious, I used this code in my binary converter in an emulator, I liked that it was a pythonic for loop haaha but thanks for further breaking down why i enjoy the method!
– Trevor Rudolph
Nov 3 '14 at 1:34
...
Find an item in List by LINQ?
...
If you want the index of the element, this will do it:
int index = list.Select((item, i) => new { Item = item, Index = i })
.First(x => x.Item == search).Index;
// or
var tagged = list.Select((item, i) => new { Item = item, Index = i });
int index = (fro...