mifi comparison

file Testing (-f,-d,-r,-r,...) [-f/root/file.txt],[-d/root/mydir] [[-f/root/file.txt]]File testing aspects [[]] same as [] string comparison (-z,-n,!=,==,...) [-Z "${str}"],["${str}"! = "${str}"],[!-n "${str}"][] can only be used for character comparisons and cannot be used for pattern matching [-Z "${STR}"]],[[! -N "${str}"] [[$a = = z*]] # if $ A starts with "Z" (pattern match) then true[[Hello = = hell?]] # pattern Match [

I am a Java developer, hibernate, and MyBatis have studied, have been asked in the Java interview, also used in project practice, Now to hibernate and MyBatis to do a contrast, so that everyone better understanding and learning, so that they do in the project more handy. The first aspect: comparison of development speed in terms of development speed, Hibernate's true mastery is more difficult than mybatis. The MyBatis framework is relatively simple an

Comparison and Hashcode Analysis of 26_ArrayList_HashSet, hashsetarraylist Entity class: package com.itcast.day1;public class ReflectPoint { private int x; public int y; public ReflectPoint(int x, int y) { super(); this.x = x; this.y = y; } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + x; result = prime * result + y;

Some time ago, a friend asked me to help him write a product comparison function. at that time, he was just visiting the green forest digital mall and clicked on the product list to see the product comparison function, then he directly downloaded his JS rolling file and extracted the style of the comparison box, and then improved it. The following is a self-writt

The following articles mainly describe MySQL column Value Comparison and detailed introduction of related logical functions. This article mainly uses code to introduce the actual operation of MySQL column value comparison, the specific content of this article is as follows. I hope it will help you in this regard. How to evaluate expressions, such as the evalSql code CREATETABL in Javascript The following ar

In PHP, there are many ways to compare strings, the first is to use the strcmp () function and the strcasecmp () function to compare bytes by Byte, and the second is to use the strnatcmp () function to compare the natural sort method, and the third is to use STRNCMP () The function specifies that the comparison begins at the location of the source string. Here are some further explanations for these methods. 1. String comparisons by Byte There are tw

there is a regular expression location# Not used[Configuration D]}Location ~ * \. (Gif | jpg | jpeg) $ {# Match all requests ending with gif jpg jpeg. However, for requests starting with/images/, Configuration D is used.[Configuration E]}Request matching example/-> Configuration/Index.html-> configuration B/Documents/document.html-> configuration C/Images/1.gif-> configuration D/Documents/1.jpg-> configuration ENote that the above matching is irrelevant to the sequence defined in the configurat

When comparing files using the Beyond Compare file Comparison tool , it will have a save function to store the comparison session records, but in order to be more insured, the user's friends can also back up important comparison session records by saving the snapshot. CRC means the cyclic redundancy code check, is the use of division and the remainder of the prin

PHP comparison operators have = = (equals) loose comparison, = = = (exactly equal to) strict comparison, where the face will introduce a lot of interesting questions. When loosely compared, PHP will unify their type, such as character to number, non-bool type to bool type, in order to avoid unexpected running effect, should use strict

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