Comparison and usage analysis of strcmp () and strcasecmp () function strings in PHP, strcmpstrcasecmp. Comparison and usage analysis of strcmp () and strcasecmp () function strings in PHP. This document describes the comparison and usage of strcmp () and strcasecmp () function strings in PHP. We will share with you the usage analysis of strcmp () and strcasecmp
Comparing two regions is often one of the functions that need to be implemented in information systems, such as comparing different organizational structures and comparing different product BOM structures, we usually use the tree data structure for comparison, such as traversal and iteration. This article presents an alternative comparison method for your reference.In a system I am working on, we also need
Mainly introduces the ArrayList and LinkedList of the two list of the five kinds of loop traversal mode, various ways of performance test comparison, according to ArrayList and LinkedList source code implementation Analysis performance results, concluding conclusions. Through this article you can learn (1) The five traversal modes of the list and their respective performance (2) The implementation of foreach and iterator (3) to deepen the understandin
See the original: http://www.cnblogs.com/sunflower627/p/3158042.html1. Comparator and comparable the same placeThey are all Java interfaces, and are used to compare the size of a custom class,What is a custom class: such as public class person{String name, int age}.When we have such a personlist, it contains Person1, Person2, Persion3 ...., we use Collections.sort (personlist),is not getting the expected results. Then there must be someone to ask, why can you sort a string list:such as stringlis
Recently viewed source code-comparison function for PHP language
Actually, the comparison function I'm talking about is not a string comparison, and I need to compare functions when I sort the array in PHP.
1, why use a comparison function
The advantage of using the comparison
Comparing PHP and JSP Web development technologies, the current situation is actually comparing PHP and Java Web development. The following is a comparison of several main aspects: 1. Comparison of language: PHP is the server scripting language for interpretation and execution. first, php is easy to use. Syntax and... SyntaxHighlighter. all ();
Comparing PHP and JSP Web development technologies, the curren
We often encounter different versions of the same file that need to be compared, especially the code files. If the manual to compare the view, it will be time-consuming strength and error, so we need to use some code comparison tools to automate these tasks. Here are 3 of the more popular and powerful tools.1. Beyond Compare this is a professional-grade code comparison and analysis tool that allows you to c
mountains and gather some strange flowers and plants. In calm thinking, we can enhance our insights into social life. After such a period of cool-down, it is not difficult to determine what to do if you look back at the previous issues.
Ø cannot be left or right. Make your feet leave evil.
Do not walk the wicked path. Do not follow the bad guys. The wicked ways seem to be dark. I don't know why I fell.
Comparison Psycholo
Operator
Describe
Example
File comparison Operators
-e filename
True if filename exists
[-e/var/log/syslog]
-D filename
True if filename is a directory
[-d/tmp/mydir]
-F filename
True if filename is a regular file
[-f/usr/bin/grep]
-L filename
True if filename is a symbolic link
[-l/usr/bin/grep]
-R filename
True i
JavaScript in the application process will encounter a variety of comparisons, today to all of you to organize three kinds of situation, together to learn.
1. Comparison of two objects
JavaScript comparisons are mixed with some of the more bizarre features, so let's take a look at some simple comparisons.
Comparison of original values
> var a =
undefined
> var b =
undefined
> A = = B
true
> A = =
Original: http://apps.hi.baidu.com/share/detail/31263915
Comparison of strings and values in the shell
In the shell, the comparison between the string and the numerical method is different, pay attention to distinguish
Integer comparison:
-eq equals, such as: if ["$a"-eq "$b"]
-ne not equal to, such as: if ["$a"-ne "$b"]
-GT greater than, such as: if ["$a"-
In the use of js "= =" for string comparisons, found in the English case is OK, but in the Chinese comparison is not.Online Search provides a workaround for usingStringobject.localecompare (target)To solve the Chinese comparison problem.String_a.localecompare (string_b); /* returns:0: exact match-1: string_a * /The use of this method is to determine whether two strings are equal in the current locale.Micr
Original: http://apps.hi.baidu.com/share/detail/31263915In the shell, the comparison between the string and the numerical method is different, pay attention to distinguishInteger comparison:-eq equals, such as: if ["$a"-eq "$b"]-ne not equal to, such as: if ["$a"-ne "$b"]-GT greater than, such as: if ["$a"-gt "$b"]-ge greater than equals, such as: if ["$a"-ge "$b"]-lt less than, such as: if ["$a"-lt "$b"]-l
SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss");
String datestring = "--::";
Calendar calendar = Calendar.getinstance ();
Long nowdate = Calendar.gettime (). GetTime (); Date.gettime () Gets the millisecond date
try {
long specialdate = Sdf.parse (datestring). GetTime ();
Long betweendate = (specialdate-nowdate)/(* * *); How many days interval is calculated, divided by milliseconds to day conversion formula
System.out.print (betweendate);
} catch (ParseException e) {
e.printst
The thinkphp template engine provides a rich comparison label in the format of:
The comparison label supported by the thinkphp system and the meanings it represents are:
EQ or equal: equal toNEQ or notequal: Not equal toGT: Greater ThanEGT: greater than or equalLT: less thanELT: less than or equalHeq: Constant equalsNheq: not constant equals
1. The usage of the
PHP's comparison operator has = = = (equals) loose comparison, = = = = = = = = = = = = = = (equal) Strictly compare, there will be a lot of interesting problems.
When loosely compared, PHP will unify their type, such as character to number, non-bool type to bool type, in order to avoid unexpected effect, should use strict comparison. The following is a table of
This article describes the PHP character comparison function similar_text, strnatcmp and strcasecmp usage. Share to everyone for your reference. Specifically as follows:
The ①similar_text () function calculates the number of matching characters for two strings, which can also calculate the similarity of two strings, in percentages.
Syntax: Similar_text (string1,string2,percent)
Note: the Levenshtein () function is faster than the Similar_text () fu
Recently encountered a problem in the project, two values of the same integer value for = = comparison, found some of the mysteries of the integer, by the way also review the difference between = = and equals, first through the Damo code explained as follows:
System.out.println ("integer x = value) in the value of
The output results are:
Integer x = value in the
Through the above code and output results, we must have seen the mystery. The fi
one directory.
-O
The summary displays the results of the comparison.
-N Name
This parameter is used to issue (compare results) notifications After the file comparison has ended. Name is the filename when the notification is sent with the network.
-S options
To save the options for all file lists, the specific option switches can refer to the following characters:
-S: Compares two files in the same
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