It is important to establish and follow the encoding specifications, which keeps your code consistent, predictable, and easier to read and understand.
It is important to establish and follow the encoding specifications, which keeps your code
PHP is not case sensitive. We recommend that you always stick to "Case sensitivity ". Note that classes and functions are case-insensitive. However, even if you are negligent, the interpreter will catch this error during debugging. I. Case
Linux top command and linuxtop command
I. Introduction
TOP is a dynamic display process. You can press the buttons to refresh the current status. if you execute this command on the foreground, it excludes the foreground until the user terminates
Java code optimization (long-term updates) and java code optimization updates
Preface
Code optimization is a very important topic. Some people may think it is useless. In some small places, what are the effects of modifying or not modifying the code
I. nginx_upload_module backgroundThe nginx upload module Nginx_upload_module can be used to more effectively implement resumable upload of large files, and nginx-upload-progress-module can be installed to display the file upload progress.II. Working
The date () function of PHP is described in detail
1, year-month-dayecho Date (' y-m-j ');2007-02-6echo Date (' y-n-j ');07-2-6Uppercase Y represents the year four digits, while lowercase y represents the two digits of the year;Lowercase m
Date function usage The code is as follows:Copy code Date ($ t ); The format is as follows:Format: year-month-day hour: minute: SecondRelated time parameters:A-"am" or "pm"A-"AM" or "PM"D-a few days, two digits. If there are less than two
1. Hint that Java code can be used with the alt+/key (if you want to make the first letter of the class or method you need). I added the part: Just to enter Sysout, and then alt+/key can output System.out.prinln (), once always thought their speed
1. How do I use the StringBuffer class?Answer: 1). The StringBuffer class is used to represent a string that can be modified, called a string buffer object;2). Strings that use operators will automatically create string buffer objects;Example: STR1 +
1. Write more comments in the script This is a recommended practice that can be applied not only in shell scripts, but also in all other types of programming. commenting in a script can help you or others to read your script
A friend who sees the permission to have a directory is RWXRWXRWT is surprised what this t is, how is it not X or-? Search for the following discovery:
This t represents the so-called sticky bit.
Sticky bit: This bit can be understood
What ls-al/tmp see today is RWXRWXRWT is surprised what this t is, how is it not X or-? Search for the following discovery:
This t represents the so-called sticky bit.
Sticky bit: This bit can be understood as an anti-delete bit.
1. What is Ubuntu host name When you log in to Ubuntu after you export your account password, you will see a line prompt [email protected]~$ The ' Wang ' before the ' @ ' sign is your account name; After the ' @ ' sign, ': ' Before ' Ubuntu ' is
Array: "Focus 1" implode (delimited, arr) concatenate the array value data by the specified character For example: $arr =array (' 1 ', ' 2 ', ' 3 ', ' 4 '); $str =implode ('-', $arr); Explode ([delimited],arr) splits a string by the specified
SOURCE | Personal Blog | Author | The Cangjie of the May
Original Address | See bottom description
This article is the author: May Cangjie The combination of his work and the experience of normal learning to reopen the reason for code optimization.
1, year-month-dayecho Date (' y-m-j ');
2007-02-6
echo Date (' y-n-j ');
07-2-6
Capital Y represents a four-digit year, while lowercase y represents a two-digit number for the year;
Lowercase m represents the number of months (with leading), while
5.1 definition of an array
Array: Consists of a set of variables of the same type, with different subscripts.
Features: Each element has a uniform type, subscript has a fixed upper bound and lower bound, basic operation simple (initialization,
day04--E Oracle Query BasicsLearning Goals:? Modifying data? Delete Data? Simple query? Conditional Query? Group queriese Oracle Modified datause the UPDATE statement to modify the data in the table. U Ue pdate statement basic syntax:Update table
First, the literal value 1. StringA string is a sequence of characters that is caused by a single quotation mark ("') or double quotation mark ('" '). For example:‘a string‘"another string"If SQL Server mode is enabled for Nsi_quotes, you can refer
First episode:#目前主流数据库 Microsoft Sqlsever and access MySQL ad2 Sybase informix Oracle #小型数据库: Access: Less than 100 people with low security requirements #中型数据库: Mysql,sqlsev ER: Load at 5000 to 15000 #大型数据库: sybase,oracle,db2: Load can handle
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