Mongodb update array $pull modifier

1. $pull modifier deletes qualifying elements from the array in the following format: { $pull: { <field1>: <value|condition>, <field2>: <value|condition>, ... } } 2. Specify a value to delete all lists Give a document under a stores collection { _id: 1, fruits: [ "apples", "pears", "oranges", "grapes", "bana ...

Posted on Mon, 20 Jul 2020 10:53:53 -0400 by maniac1aw

Several methods to find the maximum and minimum values in an integer array

In integer arrays, we need to get the maximum and minimum values of array elements from them: Method 1: Sort using Array first, then from the sorted array, the first element is the smallest and the last element is the largest.   public static int FindMaxNumber(params int[] stringValue) { Array.Sort(stringV ...

Posted on Sun, 19 Jul 2020 10:32:48 -0400 by texerasmo

css pseudo-Class hover application skills

1. Write before The previous understanding was that a hover pseudo class is written on an element and the mouse can move over it to modify the style of that element. Can you change the style of another non-hover element?When using less, you can write as follows: .nav:hover{ color:red; .block{ color:b ...

Posted on Sat, 18 Jul 2020 10:25:46 -0400 by fizzwizz

css pseudo-Class hover application skills

1. Write before The previous understanding was that a hover pseudo class is written on an element and the mouse can move over it to modify the style of that element. Can you change the style of another non-hover element?When using less, you can write as follows: .nav:hover{ color:red; .block{ color:b ...

Posted on Sat, 18 Jul 2020 10:24:34 -0400 by coder9

commons-lang3 tool class learning (2)

From http://commons.apache.org/proper/commons-lang/javadocs/api-release/org/apache/commons/lang3/ Official documents to organize and remember for yourself 3. BooleanUtils Boolean Tool Class and(boolean...array) logic and BooleanUtils.and(true, true) = true BooleanUtils.and(false, false) = false ...

Posted on Fri, 17 Jul 2020 11:54:09 -0400 by bpat1434

Android Custom WheelView

function Wheeled Select View, similar to TimePicker or DataPicker, allows you to set whether or not there is a boundary (the beginning and end meet) Design sketch Explain Inherited from View to assist with scrolling with OverScroller, using a minimum API version of 9.If necessary, you can use Scroller instead, w ...

Posted on Mon, 13 Jul 2020 11:47:41 -0400 by SmoshySmosh

Merge sort algorithm implemented in Java

The following is a merge sort algorithm implemented in Java, referencing Algorithms Unlocked by Thomas H. Cormen I read some blogs from other CSDN bloggers, and I think some details can be optimized, such as avoiding overflow due to too long array length, and using mid = low + (high - low) / 2 for mid For example, instead of creating a (high ...

Posted on Fri, 10 Jul 2020 11:37:04 -0400 by netman182

GULP Compile less and Build Local Development Environment

GULP Compile less and Build Local Development Environment STEPS: 1. Create a new folder in your own development environment directory, such as opening cmd and creating a new support folder 2. Enter Folder 3. Generate using NPM Package.jsonfile 4. Global installation of gulp 5. Install plug-ins locally 6. NewGulpfile.jsfile 7. Create a fol ...

Posted on Thu, 09 Jul 2020 12:14:49 -0400 by ts10

offer rotation array

Moving the first elements of an array to the end of an array is called array rotation. Input a rotation of a non decreasing sort array and output the smallest element of the rotated array. For example, if the array {3,4,5,1,2} is a rotation of {1,2,3,4,5}, the minimum value of the array is 1. NOTE: all elements given are greater than 0. If th ...

Posted on Thu, 09 Jul 2020 12:02:42 -0400 by Osorene

offer rotation array

Moving the first elements of an array to the end of an array is called array rotation. Input a rotation of a non decreasing sort array and output the smallest element of the rotated array. For example, if the array {3,4,5,1,2} is a rotation of {1,2,3,4,5}, the minimum value of the array is 1. NOTE: all elements given are greater than 0. If th ...

Posted on Thu, 09 Jul 2020 12:02:24 -0400 by samsunnyuk