Recommended 6 articles for operational logic

The core idea of the and and or operations in Python ——— short-circuit logic recently began to look at Liaoche's Python tutorial, intended to first put "learn Python the Hard way", because the last few chapters feel still a bit difficult (well, I am too weak, but slowly come, one step　　A footprint), thinking about after watching Liao Xuefeng's tutorial and then back, perhaps some ideas. Well, the reason why write this today, is because in the Liu Xuefeng tutorial in the filter chapter appeared in the and/or operation, the previous tutorial did not mention this, just look at the time some confusion, confused, code as follows: #把一个序列中的空字符串删掉 1> def not_ Empty (s): 2> &

1. Sharing the example of and/or in Python tutorial

Summary: The core idea of the and and or operations in Python ——— short-circuit logic, and recently began to look at Liaoche's Python tutorial, to first put the "Learn Python the Hard way", because the last few chapters feel a bit difficult (well, I'm too weak, but take it slow.) , step by step), think of after watching Liao Xuefeng's tutorial and then back to the head, perhaps some ideas.

2. Wedding Songs for Weddings The binding introduction of PHP ternary operators

Introduction: Wedding song suitable for wedding songs: Wedding songs suitable for wedding songs the binding of PHP ternary operators: First look at a ternary operation formula: Copy code code as follows: <?php $a =1; $b =2; $c =3; $d = 4; echo $a < $b? ' XX ': $a < $c? ' YY ': $a < $d? ' ZZ ': ' oo ';?> generally according to other languages (such as C or Java) Rules, the above code is the operation logic: Copy the code is as follows: $a < $b = True = ' xx ' ==> end so most

3. Recursive algorithm time complexity PHP skillfully using arrays to reduce the time complexity of programs

Introduction: Recursive Algorithm time complexity: Recursive algorithm time complexity PHP skillfully use arrays to reduce the time complexity of the program: about the author Wang Dandan, IBM China System and Technology Center software engineer, since 2006 joined IBM, has been engaged in WEB system design and development work, has five years of PHP application design Open Experience. Often developers write programs, often in the design or well-conceived operational logic, directly translated in the programming language. The program can be compiled smoothly, it is very gratifying. If the running time of the program is acceptable, you will be immersed in the sense of accomplishment of writing code, often ignoring the optimization of the code in this process. Only

4. PHP comparison and logic operations, PHP operational Logic _php Tutorial

Introduction: PHP's comparison and logic operations, PHP operation logic. PHP comparison and logic operations, PHP operation Logic 1, the following values are judged to be true with empty (): Unassigned variable, undeclared variable, 0, "0", "", false, NULL, empty array ()

5. PHP comparison and logic operations, PHP operation Logic

Introduction: PHP's comparison and logic operations, PHP operation logic. PHP comparison and logic operations, PHP operation Logic 1, the following values are judged to be true with empty (): Unassigned variable, undeclared variable, 0, "0", "", false, NULL, empty array ()

6. PHP skillfully uses arrays to reduce the time complexity of the program _php

Introduction: Usually when writing programs, developers are often designed or well-conceived operational logic, directly translated in the programming language.