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【最全】CSS响应式布局的5种实现方式 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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三、rem 布局
1、rem 如何适配
rem 是相对于 html 根元素的字体大小的单位。
我们通过修改 html 中 font-size 的字体大小来控制 rem 的大小。
比如：
html {
font-size: 10px;
}
.box {
width: 10rem;
...
How to use mysql JOIN without ON condition?
...
MySQL documentation covers this topic.
Here is a synopsis. When using join or inner join, the on condition is optional. This is different from the ANSI standard and different from almost any other database. The effect is ...
Count with IF condition in MySQL query
...
Or even SUM(ccc_news_comments.id = 'approved') as a MySQL-specific trick
– mojuba
Jan 21 '13 at 20:44
1
...
Resolving javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path
...TPS SSL certificate, and our older version of java doesn’t recognize the root certificate authority (CA).
• If you can access the HTTPS URL in your browser then it is possible to update Java to recognize the root CA.
• In your browser, go to the HTTPS URL that Java could not access. Click on t...
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL? [duplicate]
Is there a Boolean data type in Microsoft SQL Server like there is in MySQL?
9 Answers
...
Quick and easy file dialog in Python?
... show only the dialog without any other GUI elements, you have to hide the root window using the withdraw method:
import tkinter as tk
from tkinter import filedialog
root = tk.Tk()
root.withdraw()
file_path = filedialog.askopenfilename()
Python 2 variant:
import Tkinter, tkFileDialog
root = T...
PHP mkdir: Permission denied problem
..., all you need it's to obtain correct path. I did it this way:
<?php
$root = $_SERVER["DOCUMENT_ROOT"];
$dir = $root . '/somefolder/';
if( !file_exists($dir) ) {
mkdir($dir, 0755, true);
}
?>
share
|
...
Using “like” wildcard in prepared statement
I am using prepared statements to execute mysql database queries. And I want to implement a search functionality based on a keyword of sorts.
...
Python Logging (function name, file name, line number) using a single file
...dy provided funcName variable
import logging
logger = logging.getLogger('root')
FORMAT = "[%(filename)s:%(lineno)s - %(funcName)20s() ] %(message)s"
logging.basicConfig(format=FORMAT)
logger.setLevel(logging.DEBUG)
Then anywhere you want, just add:
logger.debug('your message')
Example output...
SQL UPDATE all values in a field with appended string CONCAT not working
...
That's pretty much all you need:
mysql> select * from t;
+------+-------+
| id | data |
+------+-------+
| 1 | max |
| 2 | linda |
| 3 | sam |
| 4 | henry |
+------+-------+
4 rows in set (0.02 sec)
mysql> update t set data=concat(d...