• Analysis of the difference between bold and strong


    We all know that when we do website optimization, the article’s keyword bold optimization is of great benefit.But if you are careful, you will find that both strong and B are bold. For example, when the WordPress program is bold, the system will use the strong tag bold by default. So which is better. Now […]

  • Data structure tree (3): multiway search tree B tree, B + tree


    Multiway search tree Height of complete binary tree: O (log2n), where 2 is logarithm The height of the complete m-path search tree: O (logmn), where m is the logarithm and the number of nodes in each layer of the tree M-path search tree is mainly used to solve the problem of data storage which can […]

  • Introduction to $a and $b in Perl


    Even if the strict and warnings options are turned on, there are no errors or warnings in the following code. Copy codeThe code is as follows: #!/usr/bin/perluse strict;use warnings;sub test {    $a = 1;    $b = 2;    print $a, “\n”;    print $b, “\n”;}test();1; The following are the explanations of these two variables in the Perl […]

  • In-depth Analysis ofB andb in Regular Expressions


    For regular expressions, B and B are somewhat confused. Maybe if you read the following blog, you will be able to deepen your understanding of B and B. From looking at the API, you can see thatB andb are boundary matchers Let’s start with the word boundary b. Want to know what the word boundary […]