I have found on the internet this interesting article about plugins in mongoose. From that site I got this code:
function HidePlugin(schema) {
var toHide = [];
schema.eachPath(function(pathname, schemaType) {
if (schemaType.options && schemaType.options.hide) {
toHide.push(pathname);
}
});
schema.options.toObject = schema.options.toObject || {};
schema.options.toObject.transform = function(doc, ret) {
// Loop over all fields to hide
toHide.forEach(function(pathname) {
// Break the path up by dots to find the actual
// object to delete
var sp = pathname.split('.');
var obj = ret;
for (var i = 0; i < sp.length - 1; ++i) {
if (!obj) {
return;
}
obj = obj[sp[i]];
}
// Delete the actual field
delete obj[sp[sp.length - 1]];
});
return ret;
};
}
The problem is that I use typescript together with node.js. The typescript compiler gives me errors because there are no explicit types. In fact, I do not know exactly what type I have to attribute to the variables in the code
Related
I have a function to make capitalize every first word in nodejs expressjs like this:
function titleCase(str) {
var splitStr = str.toLowerCase().split(' ');
for (var i = 0; i < splitStr.length; i++) {
// You do not need to check if i is larger than splitStr length, as your for does that for you
// Assign it back to the array
splitStr[i] = splitStr[i].charAt(0).toUpperCase() + splitStr[i].substring(1);
}
// Directly return the joined string
return splitStr.join(' ');
}
But how can i use that function in global? So i can use that in my controller.
I have tried to make function.js file:
module.exports = {
titleCase: function(str) {
var splitStr = str.toLowerCase().split(' ');
for (var i = 0; i < splitStr.length; i++) {
// You do not need to check if i is larger than splitStr length, as your for does that for you
// Assign it back to the array
splitStr[i] = splitStr[i].charAt(0).toUpperCase() + splitStr[i].substring(1);
}
// Directly return the joined string
return splitStr.join(' ');
}
}
and require function.js file in server.js like this:
require('./app/helpers/function');
But its still not working.
There are several ways to do this, just make sure the syntax is right.
If you don't know the difference between these two things below or when to use them, you should read about it.
Simplest way:
exports.titleCase = function(str) {
// function here
}
Module.exports way:
function titleCase(str) {
// function here
}
module.export = {
titleCase,
}
And require for both:
// Require
const {titleCase} = require('./app/helpers/function');
// => titleCase("something");
// or
const func = require('./app/helpers/function');
// => func.titleCase("something")
global['titleCase'] = require('./app/helpers/function');
please update your server.js with global['titleCase'] = require('./app/helpers/function'); instead of require('./app/helpers/function');
I am trying to initialize a key class in a node.js program, but the instructions are running in arbitrary order and therefore it is initializing wrong. I've tried both making initialization happen in the definition and in a separate function; neither works. Is there something that I'm missing?
Current code:
class BotState {
constructor() {
this.bios = {}
this.aliases = {};
this.stories = {};
this.nextchar = 0;
}
}
var ProgramState = new BotState();
BotState.prototype.Initialize = function() {
this.bios = {};
var aliases = {};
var nextchar = 0;
this.nextchar = 0;
fs.readdir(biosdir, function (err, files) {
if (err) throw err;
for (var file in files) {
fs.readFile(biosdir + file + ".json", {flag: 'r'}, (err, data) => {
if (err) throw err;
var bio = JSON.parse(data);
var index = bio["charid"];
this.bios[index] = bio;
for (var alias in bio["aliaslist"]) {
this.aliases[bio["aliaslist"][alias].toLowerCase()] = index;
}
if (index >= nextchar) {
nextchar = index + 1;
}
})
}
this.stories = {};
this.nextchar = Math.max(Object.keys(aliases).map(key => aliases[key]))+1;
});
}
ProgramState.Initialize();
Is there some general way to make node.js just... run commands in the order they're written, as opposed to some arbitrary one?
(Apologies if the code is sloppy; I was more concerned with making it do the right thing than making it look nice.)
You are running an asynchronous operation in a loop which causes the loop to continue running and the asynchronous operations finish in some random order so you process them in some random order. The simplest way to control your loop is to switch to the promise-based version of the fs library and then use async/await to cause your for loop to pause and wait for the asynchronous operation to complete. You can do that like this:
const fsp = require('fs').promises;
class BotState {
constructor() {
this.bios = {}
this.aliases = {};
this.stories = {};
this.nextchar = 0;
}
}
var ProgramState = new BotState();
BotState.prototype.Initialize = async function() {
this.bios = {};
this.nextchar = 0;
let aliases = {};
let nextchar = 0;
const files = await fsp.readdir(biosdir);
for (const file of files) {
const data = await fsp.readFile(biosdir + file + ".json", {flag: 'r'});
const bio = JSON.parse(data);
const index = bio.charid;
const list = bio.aliaslist;
this.bios[index] = bio;
for (const alias of list) {
this.aliases[alias.toLowerCase()] = index;
}
if (index >= nextchar) {
nextchar = index + 1;
}
}
this.stories = {};
// there is something wrong with this line of code because you NEVER
// put any data in the variable aliases
this.nextchar = Math.max(Object.keys(aliases).map(key => aliases[key]))+1;
}
ProgramState.Initialize();
Note, there's a problem with your usage of the aliases local variable because you never put anything in that data structure, yet you're trying to use it in the last line of the function. I don't know what you're trying to accomplish there so you will have to fix that.
Also, note that you should never use for/in to iterate an array. That iterates properties of an object which can include more than just the array elements. for/of is made precisely for iterating an iterable like an array and it also saves the array dereference too as it gets you each value, not each index.
I'm building an office-js add-in for Excel. I need to upload the current workbook to a back end server. I've implemented an example from the Micrsoft Documentation, which seems to work fine the first time I call it, but on subsequent calls, it causes Excel to crash. I'm using Excel 365 version 1812 (build 11126.20132)
Here is the link to the example in the MS docs:
https://learn.microsoft.com/en-us/javascript/api/office/office.document
There are many examples on this page, to find the one I'm working from search for "The following example gets the document in Office Open XML" I've included the example below for ease of reference.
The code just get's the current file and dumps the characters to the console's log. It works fine the first but crashes Excel the second time--after it has shown the length of FileContent.
export function getDocumentAsCompressed() {
Office.context.document.getFileAsync(Office.FileType.Compressed, { sliceSize: 65536 /*64 KB*/ },
function (result) {
if (result.status == "succeeded") {
// If the getFileAsync call succeeded, then
// result.value will return a valid File Object.
var myFile = result.value;
var sliceCount = myFile.sliceCount;
var slicesReceived = 0, gotAllSlices = true, docdataSlices = [];
console.log("File size:" + myFile.size + " #Slices: " + sliceCount);
// Get the file slices.
getSliceAsync(myFile, 0, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
}else {
console.log("Error:", result.error.message);
}
});
}
function getSliceAsync(file, nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived) {
file.getSliceAsync(nextSlice, function (sliceResult) {
if (sliceResult.status == "succeeded") {
if (!gotAllSlices) { // Failed to get all slices, no need to continue.
return;
}
// Got one slice, store it in a temporary array.
// (Or you can do something else, such as
// send it to a third-party server.)
// console.log("file part",sliceResult.value.data)
docdataSlices[sliceResult.value.index] = sliceResult.value.data;
if (++slicesReceived == sliceCount) {
// All slices have been received.
file.closeAsync();
onGotAllSlices(docdataSlices);
}
else {
getSliceAsync(file, ++nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
}
}
else {
gotAllSlices = false;
file.closeAsync();
console.log("getSliceAsync Error:", sliceResult.error.message);
}
});
}
function onGotAllSlices(docdataSlices) {
var docdata = [];
for (var i = 0; i < docdataSlices.length; i++) {
docdata = docdata.concat(docdataSlices[i]);
}
var fileContent = new String();
for (var j = 0; j < docdata.length; j++) {
fileContent += String.fromCharCode(docdata[j]);
}
console.log("fileContent.length",fileContent.length)
// Now all the file content is stored in 'fileContent' variable,
// you can do something with it, such as print, fax...
}
Here is the result
File size:21489 #Slices: 1
fileContent.length 21489
Original example from Microsoft documentation (https://learn.microsoft.com/en-us/javascript/api/office/office.document)
// The following example gets the document in Office Open XML ("compressed") format in 65536 bytes (64 KB) slices.
// Note: The implementation of app.showNotification in this example is from the Visual Studio template for Office Add-ins.
function getDocumentAsCompressed() {
Office.context.document.getFileAsync(Office.FileType.Compressed, { sliceSize: 65536 /*64 KB*/ },
function (result) {
if (result.status == "succeeded") {
// If the getFileAsync call succeeded, then
// result.value will return a valid File Object.
var myFile = result.value;
var sliceCount = myFile.sliceCount;
var slicesReceived = 0, gotAllSlices = true, docdataSlices = [];
app.showNotification("File size:" + myFile.size + " #Slices: " + sliceCount);
// Get the file slices.
getSliceAsync(myFile, 0, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
}
else {
app.showNotification("Error:", result.error.message);
}
});
}
function getSliceAsync(file, nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived) {
file.getSliceAsync(nextSlice, function (sliceResult) {
if (sliceResult.status == "succeeded") {
if (!gotAllSlices) { // Failed to get all slices, no need to continue.
return;
}
// Got one slice, store it in a temporary array.
// (Or you can do something else, such as
// send it to a third-party server.)
docdataSlices[sliceResult.value.index] = sliceResult.value.data;
if (++slicesReceived == sliceCount) {
// All slices have been received.
file.closeAsync();
onGotAllSlices(docdataSlices);
}
else {
getSliceAsync(file, ++nextSlice, sliceCount, gotAllSlices, docdataSlices, slicesReceived);
}
}
else {
gotAllSlices = false;
file.closeAsync();
app.showNotification("getSliceAsync Error:", sliceResult.error.message);
}
});
}
function onGotAllSlices(docdataSlices) {
var docdata = [];
for (var i = 0; i < docdataSlices.length; i++) {
docdata = docdata.concat(docdataSlices[i]);
}
var fileContent = new String();
for (var j = 0; j < docdata.length; j++) {
fileContent += String.fromCharCode(docdata[j]);
}
// Now all the file content is stored in 'fileContent' variable,
// you can do something with it, such as print, fax...
}
// The following example gets the document in PDF format.
Office.context.document.getFileAsync(Office.FileType.Pdf,
function(result) {
if (result.status == "succeeded") {
var myFile = result.value;
var sliceCount = myFile.sliceCount;
app.showNotification("File size:" + myFile.size + " #Slices: " + sliceCount);
// Now, you can call getSliceAsync to download the files,
// as described in the previous code segment (compressed format).
myFile.closeAsync();
}
else {
app.showNotification("Error:", result.error.message);
}
}
);
Since you're using Excel, have you tried the CreateWorkbork API? Might be a good workaround if the Document API has a bug, like Xuanzhou indicated earlier.
Here's a CreateDocument snippet that you can load into Script Lab. It shows how to create a Workbook copy based on an existing file.
Hope all that is helpful.
We already have a fix for it now. But the fix still need some time to go to production. Please try it several days later and let me know if the issue still exists. Thanks.
I'm trying to generate a content tree for a simple wiki. Each page has a Children property that stores the id of other wiki pages. I'm trying to write a SPROC that gets all of the documents, then iterate over each page's Children property and replace each item with an actual wiki page document. I'm able to get the first set of documents, but the wikiChildQuery returns undefined and I'm not quite sure why.
I've been able to get a document with the query alone but for some reason, it doesn't work within the SPROC. Is there something I'm missing here?
function GetWikiMetadata(prefix) {
var context = getContext();
var collection = context.getCollection();
var metadataQuery = 'SELECT {\"ExternalId\": p.ExternalId, \"Title\": p.Title, \"Slug\": p.Slug, \"Children\": p.Children} FROM Pages p'
var metadata = collection.queryDocuments(collection.getSelfLink(), metadataQuery, {}, function (err, documents, options) {
if (err) throw new Error('Error: ', + err.message);
if (!documents || !documents.length) {
throw new Error('Unable to find any documents');
} else {
var response = getContext().getResponse();
for (var i = 0; i < documents.length; i++) {
var children = documents[i]['$1'].Children;
if (children.length) {
for (var j = 0; j < children.length; j++) {
var child = children[j];
children[j] = GetWikiChildren(child);
}
}
}
response.setBody(documents);
}
});
if (!metadata) throw new Error('Unable to get metadata from the server');
function GetWikiChildren(child) {
var wikiChildQuery = metadataQuery + ' WHERE p.ExternalId = \"' + child + '\"';
var wikiChild = collection.queryDocuments(collection.getSelfLink(), wikiChildQuery, {}, function(err, document, options) {
if (err) throw new Error('Error: ', + err.message);
if (!document) {
throw new Error('Unable to find child Wiki');
} else {
var children = document.Children;
if (children) {
for (var k = 0; k < children.length; k++) {
var child = children[k];
children[k] = GetWikiChildren(child);
}
} else {
return document;
}
}
if (!wikChild) throw new Error('Unable to get child Wiki details');
});
}
}
1.I'm able to get the first set of documents, but the wikiChildQuery
returns undefined and I'm not quite sure why.
Firstly, here should be corrected. In the first loop, you get children array with documents[i]['$1'].Children, however , in the GetWikiChildren function you want to get children array with document.Children? Surely,it is undefined. You need to use var children = document[0]['$1'].Children;
2.It seems that you missed the replaceDocument method.
You could refer to the snippet code of your metaDataQuery function:
for (var i = 0; i < documents.length; i++) {
var children = documents[i]['$1'].Children;
if (children.length) {
for (var j = 0; j < children.length; j++) {
var child = children[j];
children[j] = GetWikiChildren(child);
}
}
documents[i]['$1'].Children = children;
collection.replaceDocument(doc._self,doc,function(err) {
if (err) throw err;
});
}
3.Partial update is not supported by Cosmos db SQL Api so far but it is hitting the road.
So, if your sql doesn't cover your whole columns,it can't be done for your replace purpose.(feedback) It is important to note that the columns which is not mentioned in the replace object would be devoured while using replaceDocument method.
I use this function to watch an array of objects for changes:
$scope.$watch('Data', function (newVal) { /*...*/ }, true);
How can I get an object in which property has been changed so that I can push it in an array?
For example:
var myApp = angular.module("myApp", []);
myApp.factory("Data", function(){
var Data = [{id:1, property: "Random"}, {id:2, property: "Random again"}];
return Data;
});
var myBigArray = [];
function tableCtrl($scope, Data){
$scope.TheData = Data;
$scope.$watch("TheData", function() {
//Here an object should be pushed
myBigArray.push(">>Object in which property has been changed <<<");
}, true);
}
I don't see a way currently in Angular to get the changed object... I suspect you might need to traverse the new array and try to find the differences with the old array...
Edit: Note that this solution turns out to be a bad practice as it is adding a lot of watchers, which is something you do not want because it has a performance penalty.
=======
I eventually came up with this solution:
items.query(function (result) {
_(result).each(function (item, i) {
$scope.items.push(item);
$scope.$watch('items[' + i + ']' , function(){
console.log(item); // This is the item that changed.
}, true);
});
});
There is still no option like this for $watch, but you can use jQuery plugin for that, http://archive.plugins.jquery.com/project/jquery-diff
I implemented undo/redo with AngularJS using $watch, mb this can help
//History Manager Factory
.factory('HistoryManager', function () {
return function(scope) {
this.container = Array();
this.index = -1;
this.lock = false;
//Insert new step into array of steps
this.pushDo = function() {
//we make sure that we have real changes by converting to json,
//and getting rid of all hash changes
if(this.container.length == 0 || (angular.toJson(scope.widgetSlider) != angular.toJson(this.container[this.index][0]))) {
//check if current change didn't came from "undo" change'
if(this.lock) {
return;
}
//Cutting array, from current index, because of new change added
if(this.index < this.container.length-1) {
this.container = this.container.slice(0, this.index+1);
}
var currentStepSlider = angular.copy(scope.widgetSlider);
var selectedWidgetIndex = scope.widgetSlider.widgets.indexOf(scope.widgetCurrent);
//Initialising index, because of new "Do" added
this.index = this.container.length;
this.container.push([currentStepSlider, selectedWidgetIndex]);
if (this.onDo) {
this.onDo();
}
}
}
//Upon undo returns previous do
this.undo = function() {
this.lock = true;
if(this.index>0){
this.index--;
scope.widgetSlider = angular.copy(this.container[this.index][0]);
var selectedWidgetIndex = this.container[this.index][1];
scope.widgetCurrent = scope.widgetSlider.widgets[selectedWidgetIndex];
}
this.lock = false;
}
//Upon redo returns next do
this.redo = function() {
if(this.index < this.container.length-1) {
this.index++;
scope.widgetSlider = angular.copy(this.container[this.index][0]);
var selectedWidgetIndex = this.container[this.index][1];
scope.widgetCurrent = scope.widgetSlider.widgets[selectedWidgetIndex];
}
}
}
})
;