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How to remove identical query parameters from URL [closed]

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I need to remove duplicated query string parameters from the URL
input example
http://example.com/?foo=42&bar=43&foo=42&bar=43
need it to be
Expected output:
http://example.com/?foo=42&bar=43
I'm using this jquery code, but doesn't work
function removeDuplicate(url) {
url = decodeURIComponent(url); // decode the url,remove %5B becomes
var query = url.split('?')[1]; // get only the query
var parts = query.split('&'); // split the query into parts
var params = {};
for (var i = 0; i < parts.length; i++) {
var nv = parts[i].split('=');
if (!nv[0]) continue;
var value = nv[1] || true;
if (params[nv[0]] && params[nv[0]].indexOf(value)) {
params[nv[0]].push(value);
} else {
params[nv[0]] = [value];
}
}
url = url.split('?')[0] + '?';
var keys = Object.keys(params);
for (var i = 0; i < keys.length; i++) {
url += keys[i] + '=' + params[keys[i]].join('+');
if (i !== keys.length - 1) url += '&';
}
return url;
}
removeDuplicate(window.location.href)
Is that code correct or am I missing something? Thanks

One of the ways to make it done:
const link = "http://example.com/?foo=42&bar=43&foo=42&bar=43"
const params = link.replace(/.*\?/g, '') // replace everything before '?'
.split('&') // split by '&'
.filter((e, i, a) => a.indexOf(e) === i) // filter duplicates
.join('&') // join by '&'
const res = link.replace(/\?.*/g, '?' + params) // replace link params with params without duplicates
console.log(res)

This should work:
//var current = document.getElementById("current").innerHTML =
//window.location.href;
var current = 'http://example.com/?foo=42&bar=43&foo=42&bar=43';
console.log('current', current);
var splitUrl = current.split('&');
console.log(splitUrl);
var newUrl = splitUrl[0] + '&' + splitUrl[3] ;
console.log(newUrl);
Just uncomment the first two lines and comment the third line out. That's it.

insert a string at a specific position [closed]

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i have an array and i want to insert "ZZ" if the current array value(string) contains "ata", the code should replace at the end of "ata" word.
var duplicatesArray = ["abıca","abrık","apşak","abbak","abu","aparma","apalisına","appak","aparmadutı","apşak","apışık","apşak","apışıklık","apışık","apalak","apılamak","apul","apul","apulamak","aparmak","at","arkasına","gelmek","ata","atabeg","at","eri","at","ağaç","at","oğlanı","at","akdarıcı","at","otayıcı","at","uşağı","at","oğlanı","at","oynağı","at","bırakmak","at","boynuna","düşmek","at","boynuna","düşmek","at","cıvlandurmak","at","çapmak","at","çapmak","at","depretmek","at","depmek","atı","doldurmak","at","segirtmek","ateş","evi","ateş","göyniigi","atışmak","ateşe","urmak","ateşe","nal","komak","at","şalmak","at","şalmak","at","tonı","at","kaşnısı","at","kaldırmak","at","kulağı","at","koparmals","at","koşmak","at","kulağı","götliği","atlaz","atlandurmak","atlandurmak","atlanmak","atlu","azuğı","atımı","yir","ata","atalar","atıcıduğı","aç","itmek","acıtğan","acıtmak","aç","dirilmek","acır","acırak","acışıklık","acışmak","aç","tutmak"
];
var uniqueArray = duplicatesArray.filter(function(elem, pos) {
return duplicatesArray.indexOf(elem) == pos;
});
for (var i = 0; i < uniqueArray.length; i++) {
var st = uniqueArray[i];
if((st.endsWith("mak")==false) && (st.endsWith("mek")== false) && (st.length>3))
{
var b = "ata";
var insert = "ZZ";
var position = st.indexOf("b");
st = st.slice(0, position) + insert + st.slice(position);
document.writeln(st);
document.write("<br>");
}
}

I may need to edit this answer later once some details have been clarified, but it seems like you should use the .map() method on your uniqueArray.
This code will walk through each word in the list and either let it unchanged or apply the replacement if all conditions are fulfilled.
// using a shorter, already deduplicated list for sake of clarity
var uniqueArray = [
"abıca","gelmek","ata","atabeg","at","eri","yir","atalar","tutmak"
];
var result = uniqueArray.map(function(word) {
return (
!word.endsWith("mak") &&
!word.endsWith("mek") &&
word.length > 3 ?
word.replace(/ata/, "ataZZ") : word
);
});
console.log(result);

I am right or wrong? :)
var initialArray = ["abıca","abrık","apşak","abbak","abu","aparma","apalisına","appak","aparmadutı","apşak","apışık","apşak","apışıklık","apışık","apalak","apılamak","apul","apul","apulamak","aparmak","at","arkasına","gelmek","ata","atabeg","at","eri","at","ağaç","at","oğlanı","at","akdarıcı","at","otayıcı","at","uşağı","at","oğlanı","at","oynağı","at","bırakmak","at","boynuna","düşmek","at","boynuna","düşmek","at","cıvlandurmak","at","çapmak","at","çapmak","at","depretmek","at","depmek","atı","doldurmak","at","segirtmek","ateş","evi","ateş","göyniigi","atışmak","ateşe","urmak","ateşe","nal","komak","at","şalmak","at","şalmak","at","tonı","at","kaşnısı","at","kaldırmak","at","kulağı","at","koparmals","at","koşmak","at","kulağı","götliği","atlaz","atlandurmak","atlandurmak","atlanmak","atlu","azuğı","atımı","yir","ata","atalar","atıcıduğı","aç","itmek","acıtğan","acıtmak","aç","dirilmek","acır","acırak","acışıklık","acışmak","aç","tutmak"];
var newArray = []
var regexp = /(ata)(.*)?/;
for (var i = 0; i< initialArray.length; i += 1) {
newArray.push(initialArray[i].replace(regexp, "$1ZZ$2"))
}
console.log(newArray)
// ... "gelmek", "ataZZ", "ataZZbeg" ...

how to create a json object in javascript for loop [closed]

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I would like to create a JSON object inside a for loop using javascript. I am expecting an result something like this:
{
"array":[
{
"value1":"value",
"value2":"value"
},
{
"value1":"value",
"value2":"value"
}
]
}
Can somebody help me on how to achieve this result in javascript ?

Instead of creating the JSON in the for-loop, create a regular JavaScript object using your for-loops and use JSON.stringify(myObject) to create the JSON.
var myObject = {};
for(...) {
myObject.property = 'newValue';
myObject.anotherProp = [];
for(...) {
myObject.anotherProp.push('somethingElse');
}
}
var json = JSON.stringify(myObject);

var loop = [];
for(var x = 0; x < 10; x++){
loop.push({value1: "value_a_" + x , value2: "value_b_" + x});
}
JSON.stringify({array: loop});

This code produces what you need:
var result = {"array": []};
for(var i = 0; i < 2; i++){
var valueDict = {};
for(var j = 0; j < 2; j++){
valueDict["value" + (j+1).toString()] = "value";
}
result["array"].push(valueDict);
}
It uses the push function to add items to the list, and the indexer [] notation notation to modify the entries on the object prototype.
Hope it helps,

Improving performance while iterating two nested loops [closed]

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I calculate a "Top-5-List" of Birthplaces organized in an array of objects in this form
var myObjArr =[
{
"birth":
{
"year": 2012,
"name": "Manchester, Vermont, USA",
}
} , (and so on)
];
My approach however does not seem to be much performant:
for (var i = 0; i < myObjArr.length; i++) {
var alreadyListed = -1;
for (var j = 0; j < resultData.length; j++) {
if(resultData[j].key == myObjArr[i]['birth']['name']) { // birthname already in resultData
alreadyListed = j;
break;
}
}
if(alreadyListed != -1 ) { // birthname already in resultData -> raise count
resultData[alreadyListed].count += 1;
}else { // birthname not yet in resultData -> add to resultData
resultData.push({key: myObjArr[i]['birth']['name'], count: 1 });
}
}
}
Neiter javascript's forEach nor angulars angular.forEach seem to improve the performance. Any Suggestions?

You can use an object as a dictionary instead of using an array and looking for a key by iterating, this way the second "loop" is done by the Javascript implementation when looking for object keys (also it's probably not a linear scan but an hash table lookup):
var result = {};
myObjArr.forEach(function(obj) {
var key = "!" + obj.birth.name;
result[key] = 1 + (result[key] || 0);
});
I'm always adding a "!" in front of the key when using objects as dictionaries because all Javascript objects do have an inherited constructor property and I don't want to interfer with that.
The (x || 0) trick is to start with a 0 when a name has not seen before (undefined is falsy in Javascript). Adding 1 to undefined instead results in NaN.
If you really need an array as result the code is only slightly more complex:
var result = [];
var index = {};
myObjArr.forEach(function(obj) {
var key = "!" + obj.birth.name;
var ix = index[key];
if (ix === undefined) {
// Allocate a new entry
index[key] = result.length;
result.push({key:key, count:1});
} else {
result[ix].count += 1;
}
});

cut the string in javascript [closed]

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cut the string from last '/' to '.html'
I have a string like that
"/Views/GS/stockView.html"
My need the name "stockView"
How can I cut the name from a string?
Thanks.

a = "/Views/GS/stockView.html";
a.split('/').pop().split(".")[0];
Demo

use indexOf() and lastIndexOf() method, like
var str = "/Views/GS/stockView.html";
var slashPos = str.lastIndexOf('/');
var dotPos = str.indexOf('.', slashPos + 1);
var result = str.substring(slashPos + 1, dotPos);

Try using RegExp:
var view = function(str) {
return str.match(/\/(\w*)\./)[1];//finds a word between `/` and `.`
};
console.log(view("/Views/GS/stockView.html"));
console.log(view("/Views/fs/inventView.html"));
console.log(view("/Views/fs/p1/showView.jsp"));
console.log(view("/Views/fs/p2/showView123.aspx"));
Open console

Try this
var msg = "/Views/GS/stockView.html";
var startIndex = -1;
var endIndex=-1;
var length = msg.length;
for (var i = length - 1; i >= 0; i--) {
if (msg[i] == '/'){
startIndex=i+1;
break;
}
if(msg[i]==".")
endIndex=i;
}
console.log(msg.substr(startIndex,endIndex-startIndex));
Or try this
var msg = "/Views/GS/stockView.html";
var split=msg.split("/");
split=split[split.length-1].split(".");
console.log(split[0]);