perl string equality

Take over the project that others did before, found SVN in the ignore did not deal with the *.db, resulting in the image cached thumbnail files are submitted, and I just open the picture folder, it means that thumbs.db has changed. There are two

1. perl ~~ For intelligent matching, it can intelligently Determine operations based on the operands on both sides of the symbol. To determine whether an element exists in an array, do not use smart matching. The program is like this: my $x=2;my

Arithmetic operators: + (plus),-(minus), * (multiply),/(except), * * (Power),% (take more),-(Monocular negative) (1) The cardinality of the power can not be negative, such as ( -5) * * 2.5 # error; (2) The result of power can not exceed the limit of

Python's built-in objects Object type Constants Example/usage Number (numeric) 3.14159, 1234, 999L 3+4j String (String) ' Spam ', ' Guido ' List (lists) [1,[2, ' three '

Chapter Three operatorby FlamephoenixFirst, arithmetic operatorsSecond, integer comparison operatorsThree, string comparison operatorsFour, logical operatorsFive, bitwise operatorsSix, assignment operatorsVii. self-increment self-subtraction

2nd chapter, using JavaScript in HTML HTML introduces external JS script should not be placed between scripts because it will not be executed tag has a defer property that can delay script execution, but does not guarantee

In PHP from getting started to mastering video tutorials, PHP (foreign name: Php:hypertext Preprocessor, Chinese name: Hypertext preprocessor) is a common open source scripting language. The grammar absorbs the C language, Java and Perl features, is

?? One, the string functionASCII (char) returns the ASCII code value of a characterBit_length (str) returns the bit length of a stringCONCAT (S1,S2...,SN) to concatenate s1,s2...,sn into a stringConcat_ws (SEP,S1,S2...,SN) joins the S1,S2...,SN as a

Java.util.regex is a class library package that matches strings by using regular expression-ordered patterns. It consists of two classes: pattern and Matcher pattern a pattern is a regular expression that is compiled. Matcher a Matcher object is a

PHP 4.0 is a more efficient, more reliable Dynamic Web page development tool that runs faster than PHP 3.0 in most cases, and its script description is more powerful and complex, and the most notable feature is the increase in rate ratios. PHP4.0