Comparative Selection of CSS Preprocessors (Sass&Less&Stylus)

CSS preprocessor defines a new language. Its basic idea is to use a special programming language to add some programming features to CSS. CSS is used as the target to generate files. Then developers only need to use this language to code. Generally speaking, the CSS preprocessor uses a special programming language to style Web pages, and then ...

Posted on Sun, 23 Dec 2018 09:18:06 -0800 by nosheep

Reading Notes in iOS Drawing Practical UIKit Solutions (4) - Masks, Blurs and Animations

Masks, blurs and animations will add a lot to our APP. Now let's get to know it. Drawing Images with Blocks Using the following tool functions, you can simplify the process of creating an image. typedef void(^DrawingStateBlock)(); UIImage * DrawIntoImage(CGSize size, DrawingStateBlock block) { UIGraphicsBegin ...

Posted on Sun, 23 Dec 2018 01:18:06 -0800 by vbzoom.com

MDM9x25 Flashless boot(Power Manager)

Setting device tree and related platform initialization functions, mainly setting HOST_WAKE, DEVICE_RDY, HOST_RDY three GPIO and settings The interrupt functions of HOST_WAKE and DEVICE_RDY. The notifier call function related to power manager of PM and HSIC is set. mdmpm_pdata { compatible = "qcom,mdm-hsic-pm"; q ...

Posted on Sat, 22 Dec 2018 03:39:05 -0800 by nelietis

[Dead Java Concurrency] - - - ThreadPool Executor of J.U.C

html http://cmsblogs.com/ 『chenssy』 As the core class in the Executor framework, ThreadPool Executor represents the well-known thread pool, which gives us enough reason to figure it out. Next, we will work out it step by step through the source code. Internal state Threads have five states: new, ready, running, blocking, dead, and ...

Posted on Sat, 22 Dec 2018 03:03:06 -0800 by JMair

Number type, String type, Global object, Math object summary in JavaScript

http://blog.csdn.net/bboyjoe/article/details/51532319 Number type valueOf(): Returns the value of the basic type represented by the object. toString(): Passes a parameter representing the cardinality, telling it to return the string form of a numeric number of decimal digits. var num=10;   console.log(num.toString());/ ...

Posted on Sat, 22 Dec 2018 02:00:06 -0800 by Unseeeen

Exercise Question 1: C Primer Plus Chapter 6 C Control Statement: C Cycle - Reference Answer to Programming Exercise Question

1. Write a program that creates an array of 26 elements and stores 26 lowercase letters in it. Then print all the contents of the array. #include<stdio.h> int main() { char alphabet[26]; int i = 0; char ch; ch = 'a'; for(; i < 26; i++) { alphabet[i] = ch; ch++; } printf(" ...

Posted on Sat, 22 Dec 2018 01:18:06 -0800 by lyasian

android DOM, SAX, PULL parsing XML -- Exercise

SAX and PULL are recommended. The characteristics of SAX parsing: This parsing method is fast and takes up less memory, but it requires the application to process the parser's state by itself, which is more cumbersome to implement. Moreover, it only supports the reading of XML files and does not support writing. SAX parsers wor ...

Posted on Sat, 22 Dec 2018 00:21:06 -0800 by kendall

1043. Is It a Binary Search Tree (25) - JAVA implementation

Title Link Main idea of the title: Define the search binary tree and the mirror search binary tree (that is, the left child of each node of the binary search tree is older than himself, the right child is smaller than himself, and both left and right children meet the definition of the tree) [The same value is placed in the right subtree]. ...

Posted on Fri, 21 Dec 2018 19:36:05 -0800 by alex57

Selection and optimization of spatial index (GiST, BRIN, R-Tree) - Aliyun RDS PostgreSQL Best Practice

Label PostgreSQL, Greenplum, PostGIS, GiST, R-Tree, BRIN, Relevance, Grid, BOX, K-Mean background Search requirements for spatial data usually include: 1. Plane, three-dimensional and multi-dimensional objects intersect, disjoint and adjacent in geometry. 2. The orientation judgment of plane, three-dimensional and multi-dimensional objects ( ...

Posted on Fri, 21 Dec 2018 19:06:06 -0800 by r4r4

leetcode 4——Median of Two Sorted Arrays

It's a difficult problem. I've been working on it for a day after reading other people's code. Record ideas for problem solving. The first thing is to distinguish the median, not the average! This problem is to find the median, if the sequence is odd, then directly take the middle, if even, then take the average of the two numbers in the midd ...

Posted on Thu, 20 Dec 2018 09:57:04 -0800 by bluntster