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How to get the nth occurrence in a string?
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edited Mar 30 at 14:56
mplungjan
118k2323 gold badges142142 silver badges201201 bronze badges
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How to set std::tuple element by index?
...rns a reference to the value. So you set the value like this:
std::get<0>(myTuple) = newValue;
This of course assumes that myTuple is non-const. You can even move items out of a tuple via std::move, by invoking it on the tuple:
auto movedTo = std::get<0>(std::move(myTuple));
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Convert a binary NodeJS Buffer to JavaScript ArrayBuffer
...rayBuffer(buf.length);
var view = new Uint8Array(ab);
for (var i = 0; i < buf.length; ++i) {
view[i] = buf[i];
}
return ab;
}
From ArrayBuffer to Buffer:
function toBuffer(ab) {
var buf = Buffer.alloc(ab.byteLength);
var view = new Uint8Array(ab);
for (var i...
Windows下 C++网络延时检测 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ndlIcmp);
}
int CPing::Ping(char* strHost)
{
u_char FAR data[4] = { 0L }; //
//unsigned long Status = 0L; //
int PingTimes = 0; //
int Received = -2; //
unsigned long Minimum = 1000000;// 最小值设置为超时值
unsigned long Maximum = 0; // 最大值设置为0
unsigne...
Capistrano error tar: This does not look like a tar archive
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answered May 29 '14 at 15:09
kubbingkubbing
6,80044 gold badges2020 silver badges1717 bronze badges
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How to fix the aspect ratio in ggplot?
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110
In ggplot the mechanism to preserve the aspect ratio of your plot is to add a coord_fixed() laye...
How do you find the sum of all the numbers in an array in Java?
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In java-8 you can use streams:
int[] a = {10,20,30,40,50};
int sum = IntStream.of(a).sum();
System.out.println("The sum is " + sum);
Output:
The sum is 150.
It's in the package java.util.stream
import java.util.stream.*;
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Float vs Decimal in ActiveRecord
...a Float. It's like a scientific notation for binary (something like +1.43*10^2). Because of that, it is impossible to store fractions and decimals in Float exactly.
That's why there is a Decimal format. If you do this:
irb:001:0> "%.47f" % (1.0/10)
=> "0.100000000000000005551115123125782702...
How to specify a min but no max decimal using the range data annotation attribute?
I would like to specify that a decimal field for a price must be >= 0 but I don't really want to impose a max value.
10 Ans...
How to find the size of localStorage
...xecute this snippet in JavaScript console (one line version):
var _lsTotal=0,_xLen,_x;for(_x in localStorage){ if(!localStorage.hasOwnProperty(_x)){continue;} _xLen= ((localStorage[_x].length + _x.length)* 2);_lsTotal+=_xLen; console.log(_x.substr(0,50)+" = "+ (_xLen/1024).toFixed(2)+" KB")};console...