Array.sort analysis This article is not talking about things to note in Javascript's native sort. For example, the default sort method will convert the value to String and sort according to the char code, so the above result will appear. Today we're going to explore the implementation behind Javascript sort
In the database, in order to improve query efficiency, the database can speed up query efficiency by creating indexes when the data is large. This article discusses the index of PostgreSQL. In most cases, using the syntax of `CREATE INDEX` directly can handle common development scenarios, there are many different types of index types available in PostgreSQL.
Recognize the fact that table is not used as a brilliant visual, recently there is a need to use tables frequently in the background, how to design a good table for users is a challenge, especially in the case of a large number of data pens and many fields, users are easily attracted to additional elements. Actually for rendering data on, table...
1111 this year, in addition to major e-commerce is double 11 special, today is also my 23rd birthday
Medium does not support code block editing itself, although I don't know the reason behind it (perhaps the engineer is not the main customer), so if you want to highlight the code, one way is to paste the image directly, paste it on the gist and then embed it
Better-Express-Error When developing express, if an error is encountered, it is usually printed directly on the error page, or directly directed to a 404, 500 page in the production side. Although there is nothing worth mentioning, but really, see this kind of page, will you feel happy? default error...
react finally released v16，In fact, the introduction of the official blog is quite complete (and pleasing to the eye)。 This article serves as notes and consolidation, streamlining some of the details. ComponentDidPatch (error, info) react16's brightest part, adding errorBoundary functionality to ensure that the life cycle...
Finally, time to organize the recent interview process. Summarize some of the things that we see: Usually, company interviews only test Javascript familiarity, mostly about algorithms or interpreting prototype chains, etc., rarely examines DOM or Event operations. Almost without CSS, even if there is simply a basic question such as class and ID priority. No interview exam HTML...
ramda is a very useful library. If you have heard of lodash or underscore, you can think of ramda as functional programming lodash. Their API has many similarities, except that ramda has FP functions, any API...
In machine learning, if there are too many features, it can cause problems, such as overfitting...
I have been learning Japanese for more than three years, and did a weekly magazine called Japanese 800 houses. Fan Page Medium...
The current company is running the cap staging deploy command directly on the local terminal. Capistrano is very convenient as a tool for automatic deployment, but inevitably encounter several problems: not everyone on the team has the same environment everyone is deploying, as a result what branch is now on staging...
Today is the last day of the Ironman race, I feel that the last part of the end of my harvest is not very good, and there are many parts that are not fully introduced because of the relationship between time.
In front-end pages, we often come across layouts that require the same height. The most intuitive way to do this is to set all elements of the container to float or inline-block. float and inline-block If you use float typesetting，Not only to stretch the parent element container (clearfix)，But also for child elements set margin...
Before writing an article about their own idea of css variable，Originally not held much expectations for this attribute，Own used to SASS variables also feel like this CSS variable but like an awkward system，But if you think so people，You can refer to this article
From SASS to PostCSS about a year ago, PostCSS began to fling in the front-end ecosystem, nothing more than the so-called preprocessor features, highly customized their own plugin, the first to use cssnext function, but also with a variety of construction tools (gulp, webpack...
The origin of g0v g0v g0v was created because of an advertisement in fact because of the economic kinetic energy promotion program (that is, the history of the most cerebral ads) this group of passionate engineers decided to form g0v. Committed to promoting open government and online promotion to the public. g0v can be red, it starts from 318 school movement. Because hackfold...
Semantics, Class Naming, Event Propagation
The former who loved playing the piano and watching novels seems to be disappearing at an alarming speed