大约有 4,000 项符合查询结果（耗时：0.0197秒） [XML]
what is faster: in_array or isset? [closed]
...e, you can check out the compiled version of your script:
echo isset($arr[123])
compiled vars: !0 = $arr
line # * op fetch ext return operands
-----------------------------------------------------------------------------
1 0 > ZEND_ISSET_ISEMPTY_...
What is Normalisation (or Normalization)?
...ase that usually contains family members
id, name, address
214 Mr. Chris 123 Main St.
317 Mrs. Chris 123 Main St.
could be normalized as
id name familyID
214 Mr. Chris 27
317 Mrs. Chris 27
and a family table
ID, address
27 123 Main St.
Near-Complete normalization (BCNF) is usually not used...
PHP convert XML to JSON
...ult in key pointing to array of elements: <list><item><a>123</a><a>456</a></item><item><a>123</a></item></list> -> {"item":[{"a":["123","456"]},{"a":"123"}]}. A solution at php.net by ratfactor solves that issue by always sto...
What is “export default” in javascript?
...ello() {
console.log("Modul: Saying hello!");
}
export let variable = 123;
modul2.js
export function hello2() {
console.log("Module2: Saying hello for the second time!");
}
export let variable2 = 456;
modul3.js
export default function hello3() {
console.log("Module3: Saying hello...
How to store a dataframe using Pandas
...
Pickle works good!
import pandas as pd
df.to_pickle('123.pkl') #to save the dataframe, df to 123.pkl
df1 = pd.read_pickle('123.pkl') #to load 123.pkl back to the dataframe df
share
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...
Getting parts of a URL (Regex)
...ex:
var a = document.createElement('a');
a.href = 'http://www.example.com:123/foo/bar.html?fox=trot#foo';
['href','protocol','host','hostname','port','pathname','search','hash'].forEach(function(k) {
console.log(k+':', a[k]);
});
/*//Output:
href: http://www.example.com:123/foo/bar.html?fox=t...
How can I check if a string represents an int, without using try/except?
...xcept ValueError:
return False
>>> print RepresentsInt("+123")
True
>>> print RepresentsInt("10.0")
False
It's going to be WAY more code to exactly cover all the strings that Python considers integers. I say just be pythonic on this one.
...
Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注IT技能提升
...匹配；!~为不区分大小写不匹配
就是当用户输入 www.a.com.cn 自动跳转到www.a.com 这个域名：
rewrite ^/(.*)$ http://www.a.com/$1 permanent; 或者cname
例如下面设定nginx在用户使用ie的使用重定向到/nginx-ie目录下：
if ($http_user_agent ~ MSIE) {
...
Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注IT技能提升
...匹配；!~为不区分大小写不匹配
就是当用户输入 www.a.com.cn 自动跳转到www.a.com 这个域名：
rewrite ^/(.*)$ http://www.a.com/$1 permanent; 或者cname
例如下面设定nginx在用户使用ie的使用重定向到/nginx-ie目录下：
if ($http_user_agent ~ MSIE) {
...
Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注IT技能提升
...匹配；!~为不区分大小写不匹配
就是当用户输入 www.a.com.cn 自动跳转到www.a.com 这个域名：
rewrite ^/(.*)$ http://www.a.com/$1 permanent; 或者cname
例如下面设定nginx在用户使用ie的使用重定向到/nginx-ie目录下：
if ($http_user_agent ~ MSIE) {
...