Programmer Group

(I) use scenarios Usually in the ordered numbers, find a number that meets certain conditions Multiple questions It needs to be traversed many times and has a large amount of data (II) basic process Determine the boundary (low, high) value To determine the boundary moving condition, write only one side moving (low=mid hig ...

This note is excerpted from: https://www.cnblogs.com/zhili/archive/2012/07/18/ThreadPool.html Record the learning process for future reference. I. thread pool Foundation First of all, it takes a lot of time to create and destroy threads. Second, too many threads also waste memory resources. Therefore, creating too many threads through Thread cl ...

Quick sorting analysis: for the operation of array subscript, it is necessary to pay attention to the initial value setting of conditional loop variable and the judgment of loop end condition, and pay attention to the multivariable control of conditional structure. Sometimes it's very convoluted and requires more proficiency, so mo ...

The following content is the result of network excerpt and practice modification. If it is the same, please understand!!!!   1. First, the front-end page code: Where, < input type = "file" id = "file_input" name = "filepath" multiple = "multiple" / >, the multiple attribute needs to be set <styl ...

debounce When users interact with web pages, they often request and send data to the server according to the status and data of the page, such as real-time verification according to the user's input data, pull-down request data, etc. if the user operates too frequently, the page status and data change too frequently, they will make multiple req ...

Directory 1. What is Top K Question 2. The actual application scenario of Top K 3. Code implementation of Top K problem and its efficiency comparison 1. Implement Top K by heap 2. Implement Top K with Quick Row 3. Efficiency comparison of TopK by heap or fast-pad   * Body 1. What is Top K problem? Given an unordered array of length N, output th ...

Reference source: Vitu.AI Today, let's look at the use of Boolean. Boolean types in Python are represented by two constants, True and False. x = True print(x) print(type(x)) Unlike the example above, which assigns True to x, we usually don't put True and False directly in the code, but get the Boolean value through some operational comparison, ...

timestamp type partition, please move = > MySql table partition (based on time timestamp)Environmental Science:MySQL 8.0.18 (unverified for 5.6 and 5.7)The field type of partition condition is datetimeThe complete sql operation table partition statement is as follows: -- 1.Delete table drop table t_test; -- ============================== ...

The online script content is as follows:[root@localhost ~]# cat /data/scripts/check_php.sh #!/bin/bash Date=`date "+%Y-%m-%d %H:%M:%S"` Num=$(ps -ef|egrep "countjs_syc_site*|countjs_syc_plan*|countjs_syc.php|countjs_syc_img*|setcache*"|grep -v grep |wc -l) Pid=$(/bin/ps -ef|egrep "countjs_syc_site*|countjs_syc_plan*|countjs_syc.php|countjs_ ...

Are you in? It should be. by the way, there's no six pulse sword here, or even it can't compete with the six pulse sword. But the title of this blog post is called this. It's not changed. What's more? Back to the main topic, the functions in javascript are curried, and many articles on the Internet are written in various ways, even with fancy s ...