foreach function

Collection Query4Db. Tablename.find ({"ListData.listData1.field":2});5 Non-collection queries6Db. Tablename.find ({"Field":2});7 Multi-Criteria Query8Db. Tablename.find ({"Field1":1, "Field2": "Test"});9 Ten Non-collection new OneDb.

//Add a image_count field for each article document to record the number of images that this article containsdb[' Test.articles '].find ({' title ': ' WFC Test '}). ForEach (function(thisarticle) {//This is going to be forced to reshape, or it will

Preface Uncle Bob proposed and carried forward S.O.L. i. d. Five Principles for better Object-Oriented Programming: 1. theSingleResponsibilityPrinciple (single responsibility SRP) 2. theOpen/ClosedPrinciple (open and closed principle OCP) 3. theLisk.

This article will share with you the function of adding and removing javascript class names. For more information about how to add and remove javascript class names, see this article. Method 1: Use the className attribute; Method 2: Use the

This article mainly summarizes common methods of js arrays and strings. It has some reference value. Let's take a look at the basics of js recently, starting with arrays and strings. Common Methods for string: 1. substring (index at the start of

Bridging mode is the function of separating the implementation part from the abstract part so that the two can change independently. Bridging mode is especially useful when implementing APIs. For example, the first singleton. var singleton =

JavaScript Internal principle Series-closures (Closures) OverviewThis article will cover a topic that JavaScript often discusses-closures (closure). Closures are already a commonplace topic, and there are a lot of articles that cover the contents of

In this chapter, we will introduce closure, a common topic in JavaScript ). In fact, we have all talked about closures. However, we should try to discuss the closure from a theoretical point of view to see how the closure inside ECMAScript works. In

Apply Method Apply is a method available to all functions.. Its signature is as follows: func.apply(thisValue, [arg1, arg2, ...]) If thisValue is not taken into account, The above call is equivalent: func(arg1, arg2, ...) That is to say,Apply allows

Multiple implementation version instances of the observer mode in the Javascript Design Mode This article mainly introduces multiple implementation version instances of the observer mode of Javascript design mode. This article provides three

Recommended forEach, $. each, and map methods in JS, foreach. each ForEach is the most basic of the new Array method in ecma5. it is traversal and loop. For example: [1, 2, 3, 4]. forEach (alert ); Equivalent to the for loop below var array = [1, 2,

Original (Wall): http://www.2ality.com/2012/06/dense-arrays.html   In general, arrays in JavaScript are sparse, that is, there can be gaps between elements in the array, because an array is actually a key-value ing. this article explains

Mapreduce is a programming model used for parallel operations on large-scale datasets (larger than 1 Tb. Concepts such as map and reduce are borrowed from functional programming languages, there are also features borrowed from Vector programming

Deep understanding of JavaScript series (16): closure (Closures), javascriptclosuresIntroduction In this chapter, we will introduce closure, a common topic in JavaScript ). In fact, we have all talked about closures. However, we should try to

Js forEach, jsforeachZookeeper The forEach () function traverses the array from start to end. There are three parameters: array element, element index, and array (if a parameter is an array element, it is the value of the array. Var data = [1, 2,

The function is as follows: Copy codeThe Code is as follows: foreach = function (obj, insp ){ If (obj = null & obj. constructor! = Array ){ Return []; } // Obj is the array to be processed. obj = null indicates that the object does not exist. obj.

Implementation of a 3D topology tree based on HT for Web, ht Topology In HT for Web, 2D and 3D Applications Support displaying tree-structured data with different display effects. The tree-structured 2D data has obvious hierarchical relationships.

This article mainly introduces how to add ECMA5 arrays and the implementation of forEach () imitation, you can refer to the following code example to introduce the new method forEach () for ECMA5 arrays. the specific code is as follows, var o = {

This article mainly introduces multiple implementation version instances of the observer mode of Javascript design mode. This article provides three implementation version codes and Jquery implementation versions. For more information,

Talk about the source code of Zepto.js. Today I analyze the event, I am lazy, the basic function of the front is not analyzed. Just press the module to write it.Let's talk briefly about the approximate structure of zepto before analyzing it.var