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Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...Lua是类C的，所以，他是大小写字符敏感的。下面是Lua的Hello World。注意：Lua脚本的语句的分号是可选的，这个和GO语言很类似。print("Hello World")复制代码
你可以像python一样，在命令行上运行lua命令后进入lua的shell中执行语...
How to split a String by space
...defaulting to... something else? You can use the whitespace regex:
str = "Hello I'm your String";
String[] splited = str.split("\\s+");
This will cause any number of consecutive spaces to split your string into tokens.
As a side note, I'm not sure "splited" is a word :) I believe the state of be...
Pure JavaScript Send POST Data Without a Form
...so, RESTful lets you get data back from a POST request.
JS (put in static/hello.html to serve via Python):
<html><head><meta charset="utf-8"/></head><body>
Hello.
<script>
var xhr = new XMLHttpRequest();
xhr.open("POST", "/postman", true);
xhr.setRequestHeader...
Search and replace in bash using regular expressions
...
This actually can be done in pure bash:
hello=ho02123ware38384you443d34o3434ingtod38384day
re='(.*)[0-9]+(.*)'
while [[ $hello =~ $re ]]; do
hello=${BASH_REMATCH[1]}${BASH_REMATCH[2]}
done
echo "$hello"
...yields...
howareyoudoingtodday
...
What is the parameter “next” used for in Express?
...et("/", function(httpRequest, httpResponse, next){
httpResponse.write("Hello");
next(); //remove this and see what happens
});
app.get("/", function(httpRequest, httpResponse, next){
httpResponse.write(" World !!!");
httpResponse.end();
});
app.listen(8080);
...
How do I concatenate multiple C++ strings on one line?
...lt;sstream>
#include <string>
std::stringstream ss;
ss << "Hello, world, " << myInt << niceToSeeYouString;
std::string s = ss.str();
Take a look at this Guru Of The Week article from Herb Sutter: The String Formatters of Manor Farm
...
JavaScript loop through json array?
... "1",
"msg" : "hi",
"tid" : "2013-05-05 23:35",
"fromWho": "hello1@email.se"
},
{
"id" : "2",
"msg" : "there",
"tid" : "2013-05-05 23:45",
"fromWho": "hello2@email.se"
}];
You can loop over the Array like this:
for(var i = 0; i < json.length; i++) {
var ...
How can I convert ereg expressions to preg in PHP?
...
The biggest change in the syntax is the addition of delimiters.
ereg('^hello', $str);
preg_match('/^hello/', $str);
Delimiters can be pretty much anything that is not alpha-numeric, a backslash or a whitespace character. The most used are generally ~, / and #.
You can also use matching bracke...
What is the difference between char s[] and char *s?
...
The difference here is that
char *s = "Hello world";
will place "Hello world" in the read-only parts of the memory, and making s a pointer to that makes any writing operation on this memory illegal.
While doing:
char s[] = "Hello world";
puts the literal st...
Cannot set property 'innerHTML' of null
...
You have to place the hello div before the script, so that it exists when the script is loaded.
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