I am trying to get all the items in an array to show using json and jquery from the song of ice and fire api. I can only get one item to show from each of the arrays.
Here is the codepen: https://codepen.io/frederickalcantara/pen/aWeXOz
var data;
$.getJSON(characters[i], function(json) {
data = json;
var alliance = $('#alliance');
for (var i = 0; i < data.allegiances.length; i++) {
if (i === data.allegiances.length - 1) {
$.getJSON(data.allegiances[i], function(json1) {
alliance.html(json1.name);
});
} else {
$.getJSON(data.allegiances[i], function(json1) {
alliance.html(json1.name + ', ');
});
}
}
const title = $('#title');
if (data.titles.length === "") {
return 'N/A';
} else {
for (i = 0; i < data.titles.length; i++) {
if (i === data.titles.length - 1) {
title.html(data.titles[i]);
} else {
title.html(data.titles[i]) + ', ';
}
}
const tv = $('#seasons');
for (var i = 0; i < data.tvSeries.length; i++) {
if (i === data.tvSeries.length - 1) {
tv.html(data.tvSeries[i]);
} else {
tv.html(data.tvSeries[i] + ', ');
}
}
const actor = $('#actors')
if (json.playedBy === "") {
return 'N/A';
} else {
actor.html(json.playedBy);
}
});
The main problem is your loop. You keep replacing the value in the html element until the last value in the array. You can simplify this code like this:
title.html(data.titles.join(','));
which replaces all of this:
for (i = 0; i < data.titles.length; i++) {
if (i === data.titles.length - 1) {
title.html(data.titles[i]);
} else {
title.html(data.titles[i]) + ', ';
}
}
Update: Handling the allegiances.
Using a Promise here is important because you are making a number of AJAX calls and you need to be sure that they are resolved before attempting to display them. You can replace the entire for loop for the allegiances like this:
Promise.all(data.allegiances.map(function(ally){
return new Promise(function(resolve, reject){
$.getJSON(ally, function(json) {
resolve(json.name);
});
});
}))
.then(function(allies){
alliance.html(allies.join(', '));
});
Related
I am trying to do a very simple stock counting app, and display dynamically the stocks for each item. When I try to pair the button with its item, it doesn't work, even though the 2 strings are actually a match.
Here is the faulty function:
socket.on('Stock init', (data) => {
items = data.items;
displayStock(items);
});
function displayStock(items) {
fridgeItem.forEach((fridgeItem) => {
for (let i = 0; i < items.length; i++) {
var databaseProduct = items[i].name;
var databaseQuantity = items[i].chilled.toString();
console.log(fridgeItem.textContent, databaseProduct);
}
if (fridgeItem.textContent === databaseProduct) {
fridgeItem.textContent = databaseProduct + ' ' + databaseQuantity;
} else {
console.log('err');
}
});
}
Answer might be stupid but I can't see it at the moment. Thanks
I'm trying to extract text from a pdf and then return a number that represents how many pages of the pdf are matched by a regex that I define.
My problem is that, rather than periodically checking whether or not the text of a single page is part of the match, my function divides the pieces up into smaller sections than pages. Count is meant to increment only after an entire page has been read.
getnopages: function(){
var fulltext = ""
var partialmatch;
var somerx = /something/
return pdfjs.getDocument(data).then(function(pdf) {
var pages = [];
pageNumbers = [];
for (var i = 0; i <= 6; i++) {
pages.push(i);
}
var found = false;
var count = 1;
return Promise.all(pages.map(function(pageNumber) {
pageNumbers.push(pageNumber);
return pdf.getPage(pageNumber + 1).then(function(page)
return page.getTextContent().then(function(textContent) {
return textContent.items.map(function(item) {
fulltext+=item.str+'&&&';
return item.str;
}).join('&&&');
});
}).then(function(){
count++;
console.log('the count is ' + count)
var partialmatch;
try {
partialmatch = fulltext.match(somerx)[0]
console.log('the match: ' + partialmatch)
var full = fulltext.slice(0, fulltext.length-3)
console.log('the full text ' + full)
if (fulltext && partialmatch!==full && !found){
found = true;
console.log('now we found our number: ' + count) // this finds where the full text differs from the partial text but returns a number too large to be a page number
}
}
catch(e){
console.log(e)
}
});
}));
}
Can anyone help me figure out how to rewrite this so that count is incrementing page numbers correctly?
I don't really know where is the problem in your code but I just suggest you to avoid too many nestings with promises. You can reduce nesting by chaining your promise like below:
getnopages: function() {
var somerx = /something/
return pdfjs.getDocument(data).then(function(pdf) {
var pages = [];
pageNumbers = [];
for (var i = 0; i <= 6; i++) {
pages.push(i);
}
var found = false;
var count = 1;
var promises = pages.map(pageNumber => {
pageNumbers.push(pageNumber);
return pdf.getPage(pageNumber + 1).then(page => {
return page.getTextContent();
}).then(textContent => {
return textContent.items.map(item => {
fulltext += item.str +'&&&';
return item.str;
}).join('&&&');
});
});
return Promise.all(promises).then(() => {
...
});
});
}
I am working on a project that needs an excel like calculation engine in the browser. But, it doesn't need the grid UI.
Currently, I am able to do it by hiding the 'div' element of Handsontable. But, it isn't elegant. It is also a bit slow.
Is there a client side spreadsheet calculation library in javascript that does something like this?
x = [ [1, 2, "=A1+B1"],
[2, "=SUM(A1,A2"),3] ];
y = CalculateJS(x);
##############
y: [[1, 2, 3],
[2,3,3]]
I'm not aware of any (although I haven't really looked), but if you wish to implement your own, you could do something along these lines (heavily unoptimized, no error checking):
functions = {
SUM: function(args) {
var result = 0;
for (var i = 0; i < args.length; i++) {
result += parseInt(args[i]);
}
return result;
}
};
function get_cell(position) {
// This function returns the value of a cell at `position`
}
function parse_cell(position) {
cell = get_cell(position);
if (cell.length < 1 || cell[0] !== '=')
return cell;
return parse_token(cell.slice(1));
}
function parse_token(tok) {
tok = tok.trim();
if (tok.indexOf("(") < 0)
return parse_cell(tok);
var name = tok.slice(0, tok.indexOf("("));
if (!(name in functions)) {
return 0; // something better than this?
}
var arguments_tok = tok.slice(tok.indexOf("(") + 1);
var arguments = [];
while (true) {
var arg_end = arguments_tok.indexOf(",");
if (arg_end < 0) {
arg_end = arguments_tok.lastIndexOf(")");
if (arg_end < 0)
break;
}
if (arguments_tok.indexOf("(") >= 0 && (arguments_tok.indexOf("(") < arg_end)) {
var paren_amt = 1;
arg_end = arguments_tok.indexOf("(") + 1;
var end_tok = arguments_tok.slice(arguments_tok.indexOf("(") + 1);
while (true) {
if (paren_amt < 1) {
var last_index = end_tok.indexOf(",");
if (last_index < 0)
last_index = end_tok.indexOf(")");
arg_end += last_index;
end_tok = end_tok.slice(last_index);
break;
}
if (end_tok.indexOf("(") > 0 && (end_tok.indexOf("(") < end_tok.indexOf(")"))) {
paren_amt++;
arg_end += end_tok.indexOf("(") + 1;
end_tok = end_tok.slice(end_tok.indexOf("(") + 1);
} else {
arg_end += end_tok.indexOf(")") + 1;
end_tok = end_tok.slice(end_tok.indexOf(")") + 1);
paren_amt--;
}
}
}
arguments.push(parse_token(arguments_tok.slice(0, arg_end)));
arguments_tok = arguments_tok.slice(arg_end + 1);
}
return functions[name](arguments);
}
Hopefully this will give you a starting point!
To test in your browser, set get_cell to function get_cell(x) {return x;}, and then run parse_cell("=SUM(5,SUM(1,7,SUM(8,111)),7,8)"). It should result in 147 :)
I managed to do this using bacon.js. It accounts for cell interdependencies. As of now, it calculates values for javascript formula instead of excel formula by using an eval function. To make it work for excel formulae, all one has to do is replace eval with Handsontable's ruleJS library. I couldn't find a URI for that library... hence eval.
https://jsfiddle.net/sandeep_muthangi/3src81n3/56/
var mx = [[1, 2, "A1+A2"],
[2, "A2", "A3"]];
var output_reference_bus = {};
var re = /\$?[A-N]{1,2}\$?[1-9]{1,4}/ig
var alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".split('');
function convertToCellRef(rows, cols) {
var alphabet_index = rows+1,
abet = "";
while (alphabet_index>0) {
abet = alphabet[alphabet_index%alphabet.length-1]+abet;
alphabet_index = Math.floor(alphabet_index/alphabet.length);
}
return abet+(cols+1).toString();
}
function getAllReferences(value) {
if (typeof value != "string")
return null;
var references = value.match(re)
if (references.length == 0)
return null;
return references;
}
function replaceReferences(equation, args) {
var index = 0;
return equation.replace(re, function(match, x, string) {
return args[index++];
});
}
//Assign an output bus to each cell
mx.forEach(function(row, row_index) {
row.forEach(function(cell, cell_index) {
output_reference_bus[convertToCellRef(row_index, cell_index)] = Bacon.Bus();
})
})
//assign input buses based on cell references... and calculate the result when there is a value on all input buses
mx.forEach(function(row, row_index) {
row.forEach(function(cell, cell_index) {
if ((all_refs = getAllReferences(cell)) != null) {
var result = Bacon.combineAsArray(output_reference_bus[all_refs[0]]);
for (i=1; i<all_refs.length; i++) {
result = Bacon.combineAsArray(result, output_reference_bus[all_refs[i]]);
}
result = result.map(function(data) {
return eval(replaceReferences(cell, data));
})
result.onValue(function(data) {
console.log(convertToCellRef(row_index, cell_index), data);
output_reference_bus[convertToCellRef(row_index, cell_index)].push(data);
});
}
else {
if (typeof cell != "string")
output_reference_bus[convertToCellRef(row_index, cell_index)].push(cell);
else
output_reference_bus[convertToCellRef(row_index, cell_index)].push(eval(cell));
}
})
})
output_reference_bus["A2"].push(20);
output_reference_bus["A1"].push(1);
output_reference_bus["A1"].push(50);
I'm making a simple twitter app to work on my javascript.
The code below is supposed to identify every tweets location and count the number of tweets per location.
However, it doesn't increment, it just creates a new array.
What is wrong with my code? How can I make it better?
Thank you
var Twitter = require('node-twitter'),
twit = {},
loc = [];
twit.count = 0;
var twitterStreamClient = new Twitter.StreamClient(
//credentials
);
twitterStreamClient.on('close', function () {
console.log('Connection closed.');
});
twitterStreamClient.on('end', function () {
console.log('End of Line.');
});
twitterStreamClient.on('error', function (error) {
console.log('Error: ' + (error.code ? error.code + ' ' + error.message : error.message));
});
twitterStreamClient.on('tweet', function (tweet) {
if (loc.indexOf(tweet.user.location) === -1) {
loc.push({"location": tweet.user.location, "locCount": 1});
} else {
loc.loation.locCount = loc.loation.locCount + 1;
}
console.log(loc);
});
var search = twitterStreamClient.start(['snow']);
You need to rewrite on tweet callback:
var index = loc.reduce(function(acc, current, curIndex) {
return current.location == tweet.user.location ? curIndex : acc;
}, -1);
if (index === -1) {
loc.push({"location": tweet.user.location, "locCount": 1});
} else {
loc[index].locCount++;
}
Array.indexOf is not matching as you think it is. You're creating a new object and pushing it into the array, and regardless of whether its properties match a different object perfectly, it will not be === equal. Instead, you have to find it manually:
var foundLoc;
for (var i = 0; i < loc.length; i++) {
if (loc[i].location.x === location.x)
foundLoc = loc[i];
break;
}
}
if (!foundLoc) {
loc.push({location: location, count: 0});
} else {
foundLoc.count++
}
I am optimizing a Java code to JS, but runs on Nashorn and do not own debug option. The input is val = "JPG ou PNG" and the output is "JPG ou PNG". Why does this happen? I need the output to be "jpg/png"
Function
function process(val) {
var cleaned = val.replaceAll("[•×\\tª°▪º⊗ fi ²●˚~ĩ`ũ]", "").trim().toLowerCase();
var out = [];
if (cleaned.contains("ou")) {
out = cleaned.split("ou");
}
else if (cleaned.contains("/")) {
out = cleaned.split("/");
}
else {
return cleaned;
}
for (var i = 0; i < out.length; i++) {
out[i] = out[i].trim();
}
return join(out, "/");
}
Three of your functions don't exist in javascript:
replaceAll(searchValue, newValue) in javascript is replace(searchValue, newValue)
contains(searchValue) in javascript is indexOf(searchValue) > -1
join(array, separator) in javascript is array.join(separator)
JSFIDDLE DEMO
Here's my solution:
function process(val) {
var cleaned = val.replace("[•×\\tª°▪º⊗ fi ²●˚~ĩ`ũ]", "").trim().toLowerCase();
var out = [];
if (cleaned.indexOf("ou") >= 0) {
out = cleaned.split("ou");
}
else if (cleaned.indexOf("/") >= 0) {
out = cleaned.split("/");
}
else {
return cleaned;
}
for (var i = 0; i < out.length; i++) {
out[i] = out[i].trim();
}
return join(out, "/");
}
Your logic was right, but strings in Javascript don't have 'replaceAll' and 'contains', so I replaced them with 'replace' and 'indexOf(x) >= 0'.
Also, you mentioned you don't have the option to debug in your environment, yet the function you provided is pretty standalone. This means you could easily copy it into another environment to test it in isolation.
For example, I was able to wrap this code in a HTML file then open it in my web browser (I had to implement my own 'join').
<html>
<body>
<script>
function join(val, divider) {
var out = "";
for(var i = 0; i < val.length; i++) {
if(out.length > 0) out += divider;
out += val[i];
}
return out;
}
function process(val) {
var cleaned = val.replace("[•×\\tª°▪º⊗ fi ²●˚~ĩ`ũ]", "").trim().toLowerCase();
var out = [];
if (cleaned.indexOf("ou") >= 0) {
out = cleaned.split("ou");
}
else if (cleaned.indexOf("/") >= 0) {
out = cleaned.split("/");
}
else {
return cleaned;
}
for (var i = 0; i < out.length; i++) {
out[i] = out[i].trim();
}
return join(out, "/");
}
var inval = "JPG ou PNG";
var outval = process(inval);
console.log(inval + " => " + outval);
</script>
</body>
</html>
I verified it works by opening up the console and seeing the output "JPG ou PNG => jpg/png".