It would be nice to have a super quick way to do this:
"console.log("var: " + var)"?
Tried this, but not sure if there's a way to get a variable name as a string once it's been passed in, or convert the name string to a reference to the variable...
var mLog = function(varNameStr){
console.log(varNameStr + ": " + _____);
}
EDIT: Judging by the results of googling "get name string of a variable js", it looks like there's no easy way to grab the name string of a variable from the reference (You have to create hash tables or other structures that make it not worthwhile.)
So, the only possible solution would be to convert a string into a reference to the variable. Is that possible in JS?
The following will do the trick. Pass it a variable name in string form.
var mLog = function(varStr){
console.log(varStr + ": " + eval(varStr));
}
Example:
> var strVar = 'A string variable';
> mLog('strVar');
< strVar: A string variable
> var arrVar = [1,2,3];
> mLog('arrVar');
< arrVar: 1,2,3
There is no way to "extract" the variable name, since variables aren't actually data. The closest thing you could do is use it for objects. Something like:
var obj= {
prop: 'value'
};
function mLog(object, prop) {
console.log(prop + ': ' + object[prop];
}
mLog(obj, 'prop');
Related
I have an object in JS like this:
var getToDoValue = document.getElementById("toDoInput").value;
var nameOfTeamMember = "Tobias";
var person = new Object();
person.task = "Task: " + getToDoValue;
person.member = "Member: " + nameOfTeamMember;
But problem comes when I try to enter the value of "nameOfTeamMember into an if statement:
var mem = person.member;
if (mem == "Tobias") {
console.log("works");
}
This does not work. But when I just console.log "var mem" outside of if statement it gives me "Member: Tobias". Any suggestions? Im still kinda new to JS so prob something with the comparisons
the issue with you code is that the value in person.member is "Member: Tobias" as you pointed out from the result of your console.log, which is the result from the line of code below where you are concatenating the name with the string "Memeber: " and assigning it to the member property.
person.member = "Member: " + nameOfTeamMember;
One option you could use to do the comparison would be:
if (mem.contains("Tobias", 8) {
console.log("works");
}
The 8 is so your search starts after the colon (:) so you don't include "Member:" in it, just what comes after it, which is the actual member name.
My problem is, I want to pass a parameter which is a List to my location.href
function addNewDriver()
{
var pEntityType = <%=c.WIDOC_ENTITY_DRIVER%>;
var pListEntities = <%=lListDrivers%>;
location.href= "<%= c.url %>do/user/groupItemForm.step1.jsp?idClient=" + <%=pIdClient%> + "&listEntities:" + pListEntities +
"&idGroup=" + <%=pIdGroup%> + "&entityType=" + pEntityType + "&<%= lBackButtonUrl %>";
}
This is an example in Chrome console.
var pListEntities = [{dniPerson=4444444S, surname2Person=XXX, passportPerson=null, namePerson=XXX, idGroupItem=1, idPk=1111, surname1Person=XXXX};
This is how I think "they" wanted it.
var pListEntities = [{dniPerson:4444444S, surname2Person:XXX, passportPerson:null, namePerson:XXX, idGroupItem:1, idPk:1111, surname1Person:XXXX};
"lListDrivers" is already filled with values of each driver, like dni, name, surname etc.
The problem comes because, to pass this list, values inside can't have an equal, they need a ":", but I don't know any way to change it.
Convert your List<Map> to JSON. you can use Jackson ObjectMapper to convert it and it will change your pListEntities to a JSON object.
Here is one example.
I"m attempting to build a string in order to put the results in a DataTables table.
I'm taking an array and using regex to get everything in it's own index and my resultant string array is this:
["41.8059016", "-77.0727825", "School Zone",
"41.804526", "-77.075572", "Something",
"41.804398", "-77.0743704", "Some Other Thing",
"41.8073731", "-77.07304", "Pedestrian"]
One big string array with everything in its own index. Next I'm using a loop and building a string in order to pass it to a datatables table. The result of which SHOULD look like this:
var dataString = [
["41.8059016", "-77.0727825", "School Zone"],
["41.804526", "-77.075572", "Something"],
["41.804398", "-77.0743704", "Some Other Thing"],
["41.8073731", "-77.07304", "Pedestrian"]
];
Instead I'm getting this:
var dataString = undefined["41.8059016", "-77.0727825", "School Zone"],
["41.804526", "-77.075572", "Something"],
["41.804398", "-77.0743704", "Some Other Thing"],
["41.8073731", "-77.07304", "Pedestrian"]
];
Here is my loop code to build the string from the array:
for(var i = 0; i < routePoints.length-3; i+=3){
console.log(routePoints);
if(i >= 0 && i < routePoints.length - 4){
dataSetString += '["' + routePoints[i] + '", "' + routePoints[i + 1] + '", "' + routePoints[i + 2] + '"],';
}else if(i == routePoints.length - 3){
dataSetString += '["' + routePoints[i] + '", "' + routePoints[i + 1] + '", "' + routePoints[i + 2] + '"]';
}
}
If I simply deleted the "undefined" and paste the code in, the datatabe populates fine, but I cannot see where the undefined is even coming from. Thanks for the second set of eyes!
Usually, the undefined comes from your initialization. I don't see the code here, but you probably have something like:
var dataSetString;
instead, you should always start an empty string as:
var dataSetString = "";
As to why this happens. All uninitialized variables default to undefined. When you use the += operation, it will try to interpret what your are doing (if you have two numbers it will add them, two strings: concatenate). Undefined has no good += operation, so it uses the second part of the operation the string you are passing in. So, it automatically converts the undefined to a string and concatenates the new string to it, ending up with "undefined[blah,blah,blah"
You shouldn't compose a String like that.
It doesn't look like you need a string anyway but a 2D array.
var data = ["41.8059016", "-77.0727825", "School Zone",
"41.804526", "-77.075572", "Something",
"41.804398", "-77.0743704", "Some Other Thing",
"41.8073731", "-77.07304", "Pedestrian"
];
var dataString = [];
for (var i = 0; i < data.length; i+=3) dataString.push(data.slice(i, i + 3));
console.log(dataString);
// Should you actually need a string, you can use JSON.stringify()
console.log(JSON.stringify(dataString));
I am trying to edit a Greasemonkey/jQuery script. I can't post the link here.
The code is obfuscated and compressed with minify.
It starts like this:
var _0x21e9 = ["\x67\x65\x74\x4D\x6F\x6E\x74\x68", "\x67\x65\x74\x55\x54\x43\x44\x61\x74\x65", ...
After "decoding" it, I got this:
var _0x21e9=["getMonth","getUTCDate","getFullYear", ...
It is a huge list (500+ ). Then, it has some variables like this:
month = date[_0x21e9[0]](), day = date[_0x21e9[1]](), ...
_0x21e9[0] is getMonth, _0x21e9[1] is getUTCDate, etc.
Is it possible to replace the square brackets with the actual variable name? How?
I have little knowledge in javascript/jQuery and can not "read" the code the way it is right now.
I just want to use some functions from this huge script and remove the others I do not need.
Update: I tried using jsbeautifier.org as suggested here and in the duplicated question but nothing changed, except the "indent".
It did not replace the array variables with the decoded names.
For example:
jsbeautifier still gives: month = date[_0x21e9[0]]().
But I need: month = date["getMonth"]().
None of the online deobfuscators seem to do this, How can I?
Is there a way for me to share the code with someone, at least part of it? I read I can not post pastebin, or similar here. I can not post it the full code here.
Here is another part of the code:
$(_0x21e9[8] + vid)[_0x21e9[18]]();
[8] is "." and [18] is "remove". Manually replacing it gives a strange result.
I haven't seen any online deobfuscator that does this yet, but the principle is simple.
Construct a text filter that parses the "key" array and then replaces each instance that that array is referenced, with the appropriate array value.
For example, suppose you have a file, evil.js that looks like this (AFTER you have run it though jsbeautifier.org with the Detect packers and obfuscators? and the Unescape printable chars... options set):
var _0xf17f = ["(", ")", 'div', "createElement", "id", "log", "console"];
var _0x41dcx3 = eval(_0xf17f[0] + '{id: 3}' + _0xf17f[1]);
var _0x41dcx4 = document[_0xf17f[3]](_0xf17f[2]);
var _0x41dcx5 = _0x41dcx3[_0xf17f[4]];
window[_0xf17f[6]][_0xf17f[5]](_0x41dcx5);
In that case, the "key" variable would be _0xf17f and the "key" array would be ["(", ")", ...].
The filter process would look like this:
Extract the key name using text processing on the js file. Result: _0xf17f
Extract the string src of the key array. Result:
keyArrayStr = '["(", ")", \'div\', "createElement", "id", "log", "console"]';
In javascript, we can then use .replace() to parse the rest of the JS src. Like so:
var keyArrayStr = '["(", ")", \'div\', "createElement", "id", "log", "console"]';
var restOfSrc = "var _0x41dcx3 = eval(_0xf17f[0] + '{id: 3}' + _0xf17f[1]);\n"
+ "var _0x41dcx4 = document[_0xf17f[3]](_0xf17f[2]);\n"
+ "var _0x41dcx5 = _0x41dcx3[_0xf17f[4]];\n"
+ "window[_0xf17f[6]][_0xf17f[5]](_0x41dcx5);\n"
;
var keyArray = eval (keyArrayStr);
//-- Note that `_0xf17f` is the key name we already determined.
var keyRegExp = /_0xf17f\s*\[\s*(\d+)\s*\]/g;
var deObsTxt = restOfSrc.replace (keyRegExp, function (matchStr, p1Str) {
return '"' + keyArray[ parseInt(p1Str, 10) ] + '"';
} );
console.log (deObsTxt);
if you run that code, you get:
var _0x41dcx3 = eval("(" + '{id: 3}' + ")");
var _0x41dcx4 = document["createElement"]("div");
var _0x41dcx5 = _0x41dcx3["id"];
window["console"]["log"](_0x41dcx5);
-- which is a bit easier to read/understand.
I've also created an online page that takes JS source and does all 3 remapping steps in a slightly more automated and robust manner. You can see it at:
jsbin.com/hazevo
(Note that that tool expects the source to start with the "key" variable declaration, like your code samples do)
#Brock Adams solution is brilliant, but there is a small bug: it doesn't take into account simple quoted vars.
Example:
var _0xbd34 = ["hello ", '"my" world'];
(function($) {
alert(_0xbd34[0] + _0xbd34[1])
});
If you try to decipher this example, it will result on this:
alert("hello " + ""my" world")
To resolve this, just edit the replacedSrc.replace into #Brock code:
replacedSrc = replacedSrc.replace (nameRegex, function (matchStr, p1Str) {
var quote = keyArry[parseInt (p1Str, 10)].indexOf('"')==-1? '"' : "'";
return quote + keyArry[ parseInt (p1Str, 10) ] + quote;
} );
Here you have a patched version.
for (var i = 0; i < _0x21e9.length; i++) {
var funcName = _0x21e9[i];
_0x21e9[funcName] = funcName;
}
this will add all the function names as keys to the array. allowing you to do
date[_0x21e9["getMonth"]]()
I have a Problem with my push function in JavaScript.
<script type="text/javascript">
var myArr = []
var len = myArr.length
$.getJSON('daten.json', function(data) {
$.each(data,function(key,value) {
for(var i = 0; i <= len; i++){
myArr.push("<p>" + value.Name+i ," ", value.Nachname+i + "</p>")
}
})
$('.content').html(myArr.join(''))
})
</script>
I need to convert value.Name+i like this = value.Name0, value.Name1 and so on. I got a JSON File and the Keys are Dynamic, so the first entry got Name0 the second Name1 and so on. Now I must print the JSON file on my html page, but how I can write this line:
myArr.push("<p>" + value.Name+i ," ", value.Nachname+i + "</p>")
with my var i which increment in the loop, to call the Keys in my JSON file?
Like value.Name0. Doing value.Name+i and value.Name.i does not work.
It seems to me what you're looking for is something like this:
myArr.push("<p>" + value['Name'+i] ," ", value['Nachname'+i] + "</p>")
This portion of javascript is covered pretty nicely here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
Take the object property in a variable, use condition to check if it has value or not then concat it
var nameval = value.name;
then use in your javascript variable
nameval+i
You need to convert your i (integer value) to string prior to adding it.
use:
value.Name + i.toString()
here's the jfiddle link: http://jsfiddle.net/kpqmp49o/