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When we get a reference to an object, how do we know what type of object it is and what methods it has? Using type() First, we judge the object type by using the type() function: Basic types can be judged by type(): >>> type(123) <class 'int'> >>> type('str') <class 'str'> >>> type(None) <ty ...

The problem of monkeys eating peaches: On the first day, the monkeys picked several peaches and ate half of them immediately. They were not addicted to them. They ate one more peach. The next morning he ate half of the remaining peaches and one more. Every morning after that, I ate half and one of the rest of the previous day. ...

Summary of TP Coherent Operation of True XX Project Usage of field method Reference link: CURD method inventory: field method Used for query field method is the most frequently used method in query operations. eg1: $Model ->field('id,title,content') ->select(); The replication code here uses the field method to speci ...

With the widespread use of NoSQL, the use of traditional relational data such as mysql is gradually decreasing. django's REST support for mysql should be very clear to all, but mongo's support does not seem to be so perfect, it still needs to be supplemented by itself, which is always not easy to use. The company just had a project to add, del ...

Preface: A few days ago, we met such a demand. Here is the following picture:   Combine the lines with the same number in the front part of the table into one line, and add the price of the second line and the third line to the first line for Price Two and Price Three. As shown in the picture: After receiving such a demand, my first feeling i ...

Original address: http://blog.csdn.net/guolin_blog/article/details/9153747 I remember in the previous article, I took you together from the source point of view of the analysis. Android In view of the event distribution mechanism, I believe that friends who have read the event distribution of View already have a deep understanding. ...

The original author is divided into two parts to explain, when reproduced, directly reproduced into one article, the original place is as follows: Top episode: http://blog.csdn.net/guolin_blog/article/details/9097463 The following episode: http://blog.csdn.net/guolin_blog/article/details/9153761 Actually, I've been preparing to write a ...

el-cascader component: format conversion Sometimes an error is reported: TypeError: thsAreaCode.replace is not a function (the bug screenshot is as follows) To put it bluntly, the component returns an array instead of a string. So you can't use the. replace method to transform the format. Thus: only then has the following mod ...

Reprinted: http://blog.csdn.net/luotuo44/article/details/42963793 Warm Tip: This article uses some global variables that can be set at the start of memcached. The meaning of these global variables can be referred to.< Detailed explanation of start-up parameters of memcached " For these global variables, the approach is like< How ...

Difference debounce: When an action is invoked in n milliseconds, the action is executed. If the action is invoked in n milliseconds, the execution time will be recalculated. For example, if you hold a spring with your finger, it will not bounce until you let go. Throttle (throttle): Pre-set an execution cycle, when the time of call ...