Programmer Group

At present, there is a requirement for es aggregation query in the monitoring project, which needs to be implemented in go language, The requirement is to query that an IP is in a time range, and the average value of each monitoring indicator in a time unit. It's a bit awkward. Here is the query statement of es. It's obvious that the two field ...

Recently, I took over a page of others. The code was messy and jumbled. When I was adding functions, I found that the module I added conflicts with the original module, but I didn't know where the original module was, so I found it. But I found that this way is too clumsy, and I didn't find the corresponding tool on the Internet, so I wrote a t ...

Brief analysis of Android 'asynctask' A brief analysis of AsyncTask Classic asynchronous task: AsyncTask. Scenarios include batch download, batch copy, etc. The official document directly gives an example of bulk downloading. private class DownloadFilesTask extends AsyncTask<URL, Integer, Long> { protected Long doInBackground( ...

Sort foaming and cocktails Long time no see. Bubble sort Cocktail sort Long time no see. Having spent the Qingming vacation and looking forward to the May Day holiday, I wish all programmers a pleasant vacation, mainly to maintain their health Bubble sort When you mention the sorting algorithm, you have to mention bu ...

In the actual development projects, sometimes we use the custom button. Because in a project, many pages, in order to unify the style, we will repeatedly use many of the same or similar buttons. At this time, the custom button component is of great use. We export the defined button component, and use it in the global reference, so that it can b ...

background Recently, it's more and more hard to watch the computer at work, and my eyes are more and more uncomfortable. Occasionally, a few tears will come out. At this time, I finally realized that it must be excessive use of eyes. On average, I stare at the screen for no less than eight hours every day, and my eyes don't get pro ...

Data FIFO I. write enable - wr_en, write data - wdata //din :8bit assign wr_en = din_vld ;//din_vld is the effective indication signal of data assign wdata = {din_sop,din_eop,din};//If it is in package form, sop and eop can be written into data FIFO to ensure that starting and ending conditions are always synchronize ...

[title link] Click to open the link [main ideas] The main chain of the caterpillar is defined as the part of the node with the degree of removal of 111. If the length of the main chain is less than 222, it is a chrysanthemum diagram, obviously there are N − [N=2]N-[N=2]N − [N=2] kinds. Consider enumerating the ...

Preface This article is about using Scrapy to grab app details pages from Anzhi Market, such as click to view them Peace elite , including app name, version number, icon, classification, time, size, download, author, introduction, update instructions, software screenshots, exciting content, etc. Picture resources icon and market display (app sc ...

Differences between Hashtable, Collections.SynchronizedMap, and Concurrent HashMap thread security implementation principles and performance testing These three Map s are important collection classes in Java, and although the first two are less common, their comparison has become a high-frequency test point for Java interviews because of their ...