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Do I need to manually close an ifstream?
...nclude <fstream>
using std::ofstream;
int main() {
ofstream ofs("hello.txt");
ofs << "Hello world\n";
return 0;
}
writes file contents. But:
#include <stdlib.h>
#include <fstream>
using std::ofstream;
int main() {
ofstream ofs("hello.txt");
ofs << "Hel...
Why is String.chars() a stream of ints in Java 8?
...Java 8.
In Java 7 I would have done it like this:
for (int i = 0; i < hello.length(); i++) {
System.out.println(hello.charAt(i));
}
And I think a reasonable method to do it in Java 8 is the following:
hello.chars()
.mapToObj(i -> (char)i)
.forEach(System.out::println);...
How to use OpenSSL to encrypt/decrypt files?
...applications.
Do this:
openssl enc -aes-256-cbc -pbkdf2 -iter 20000 -in hello -out hello.enc -k meow
openssl enc -d -aes-256-cbc -pbkdf2 -iter 20000 -in hello.enc -out hello.out
Note: Iterations in decryption have to be the same as iterations in encryption.
Iterations have to be a minimum of 1...
Android NDK C++ JNI (no implementation found for native…)
...mple under apps in ndk:
https://github.com/android/ndk-samples/blob/master/hello-gl2/app/src/main/cpp/gl_code.cpp
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What is a rune?
...mport (
"fmt"
)
func main() {
fmt.Println([]byte("Hello"))
}
We try to convert a string to a stream of bytes. The output is:
[72 101 108 108 111]
We can see that each of the bytes that makes up that string is a rune.
...
Using “Object.create” instead of “new”
...ize object properties using its second argument, e.g.:
var userB = {
sayHello: function() {
console.log('Hello '+ this.name);
}
};
var bob = Object.create(userB, {
'id' : {
value: MY_GLOBAL.nextId(),
enumerable:true // writable:false, configurable(deletable):false by default
},...
[since C++11] std::array的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ndex)
front()
back();
tuple接口
array<string, 3> a = {"hello", "hwo", "are"};
tuple_size<a>::value;
tuple_element<1, a>::type; // string
get<1>(a);
把array当做c风格的数组来用
//----------------------- array as c-style array ----------------------
RUN_GTEST(Arra...
Insert a line break in mailto body
...ay also use \r with encodeURIComponent().
For example, this message:
hello\rthis answer is now well formated\rand it contains good knowleadge\rthat is why I am up voting
URI Encoded, results in:
hello%0Dthis%20answer%20is%20now%20well%20formated%0Dand%20it%20contains%20good%20knowleadge%0Dt...
Creating a jQuery object from a big HTML-string
...heerio = require('cheerio'),
$ = cheerio.load('<h2 class="title">Hello world</h2>');
$('h2.title').text('Hello there!');
$('h2').addClass('welcome');
$.html();
//=> <h2 class="title welcome">Hello there!</h2>
...
Is there a template engine for Node.js? [closed]
...example form the documentation:
<html>
<head>
<% ctx.hello = "World"; %>
<title><%= "Hello " + ctx.hello %></title>
</head>
<body>
<h1><%? setTimeout(function () { res.print("Async Header"); res.finish(); }, 2000) %>&l...