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Esprima get function and variable declarations

I want to get all function and variable declarations made in a Javascript code.
I use esprima and I wonder if there is script that I can use for my goal?
For example we have this code:
var myVar1;
var myVar2;
function myTestFunction(funcVar1, funcVar2) {
var myVar3;
}
What I except:
Array with variables
["myVar1", "myVar2"]
And an array with functions:
[{"name": "myTestFuncttion", "params":["funcVar1", "funcVar2"], "variables": ["myVar3"]}]
Any ideas how to achieve this?

Complete solution with fiddle:
Here is some JavaScript code for a test-run:
var hello = 41;
function aaaaa(p1, p2, p3){
var a1 = 7, a2 = 8;
var a3 = 9;
function bbbbb(q1, q2){
var b1 = 10, b2 = 11;
return 12;
}
var a4 = 99;
function ccccc(r1, r2, r3){
var c1 = 13;
var c2 = 14;
var c3 = 15, c4 = 16;
return 17;
}
var a5 = 88, a6 = 77;
function ddddd(s1){
return s1 === 18
? function (x){ return x+1; }
: function (y){ return 22; }
}
return p1 + a3 <= 42 ? 55 : ccc(p1, 0, 0);
}
var world = 42;
function xxxxx(x){
var z=0;
return 0;
}
I'm assuming that this is the desired output:
{
"vars": ["hello", "world" ],
"funcs": [
{
"name": "aaaaa",
"params": ["p1", "p2", "p3"],
"variables": ["a1","a2","a3","a4","a5","a6"]
},
{
"name": "bbbbb",
"params": ["q1","q2"],
"variables": ["b1","b2"]
},
{
"name": "ccccc",
"params": ["r1","r2","r3"],
"variables": ["c1","c2","c3","c4"]
},
{
"name": "ddddd",
"params": ["s1"],
"variables": []
},
{
"name": "xxxxx",
"params": ["x"],
"variables": ["z"]
}
]
}
The lists are flat and the anonymous functions within ddddd are being ignored (they are FunctionExpressions not FunctionDeclarations). Guessing that this is how you want it.
Here is the code - probably / hopefully easy to understand without further explanation:
function findDeclarations(code){
var ast = esprima.parse(code);
var funcDecls = [];
var globalVarDecls = [];
var funcStack = [];
function visitEachAstNode(root, enter, leave){
function visit(node){
function isSubNode(key){
var child = node[key];
if (child===null) return false;
var ty = typeof child;
if (ty!=='object') return false;
if (child.constructor===Array) return ( key!=='range' );
if (key==='loc') return false;
if ('type' in child){
if (child.type in esprima.Syntax) return true;
debugger; throw new Error('unexpected');
} else { return false; }
}
enter(node);
var keys = Object.keys(node);
var subNodeKeys = keys.filter(isSubNode);
for (var i=0; i<subNodeKeys.length; i++){
var key = subNodeKeys[i];
visit(node[key]);
}
leave(node);
}
visit(root);
}
function myEnter(node){
if (node.type==='FunctionDeclaration') {
var current = {
name : node.id.name,
params : node.params.map(function(p){return p.name;}),
variables : []
}
funcDecls.push(current);
funcStack.push(current);
}
if (node.type==='VariableDeclaration'){
var foundVarNames = node.declarations.map(function(d){ return d.id.name; });
if (funcStack.length===0){
globalVarDecls = globalVarDecls.concat(foundVarNames);
} else {
var onTopOfStack = funcStack[funcStack.length-1];
onTopOfStack.variables = onTopOfStack.variables.concat(foundVarNames);
}
}
}
function myLeave(node){
if (node.type==='FunctionDeclaration') {
funcStack.pop();
}
}
visitEachAstNode(ast, myEnter, myLeave);
return {
vars : globalVarDecls,
funcs : funcDecls
};
}
for testing, you can type
JSON.stringify(
findDeclarations(
'var hello=41;\n' +
aaaaa.toString() +
'var world=42;\n' +
xxxxx.toString()
),
null, 4
)
You can also use the estraverse package, it's available on github. Then, essentially, the function visitEachAstNode should be replaced by estraverse.traverse, and otherwise you can leave the code unchanged.
fiddle

how to parse a .RC file using Javascript

I am trying to parse the data from a .RC (resource definition file) to JSON using js with simple fs.readFile function, however I am getting SyntaxError: Invalid or unexpected token. At the moment I've found no other solution to parse this type of file, pls provide me with inputs to do so. Below is .RC example.
#include "shapes.h"
ShapesCursor CURSOR SHAPES.CUR
ShapesIcon ICON SHAPES.ICO
ShapesMenu MENU
{
POPUP "&Shape"
{
MENUITEM "&Clear", ID_CLEAR
MENUITEM "&Rectangle", ID_RECT
}
}
I found a package in node called, 'Jison' which is an API for creating parsers in JavaScript similar to 'PegJS', however I couldn't figure out the grammer that needs to be written for my file type also if it would support the file type. The parsed structure could look similar to,
{
"directive": [
"include",
"shapes.h"
],
"data": [
{
"name": "ShapesCursor",
"values": [
"CURSOR",
"SHAPES.CUR"
],
"children": []
},
{
"name": "ShapesIcon",
"values": [
"CURSOR",
"SHAPES.ICO"
],
"children": []
},
{
"name": "POPUP",
"values": [
"&Shape"
],
"children": [
{
"name": "MENUITEM",
"values": [
"&Clear",
"ID_CLEAR"
],
"children": []
},
{
"name": "MENUITEM",
"values": [
"&Rectangle",
"ID_RECT"
],
"children": []
}
]
}
]
}

Below grammar can be used for parsing Resource Description files to a JSON.
{
var word_Obj = {};
var word_alnum_Obj = {};
var word_alnumsp_Obj = {};
var dir_Obj = {};
var valStateDec_Obj = {};
var stateName_Obj = {};
var valStateVal_Obj = {};
var word_Count = 0;
var word_alnum_Count = 0;
var word_alnumsp_Count = 0;
var dir_Count = -1;
var valStateDec_Count = 0;
var stateName_Count = -1;
var valStateVal_Count = -1;
var begin_Count = -1;
var end_Count = -1;
var child_Count = -1;
var children_Count = -1;
var flag = 0;
}
Expected = dir:directive * nl * states:state nl* Ending:EOL {if (begin_Count === end_Count) { return { Parsed_RC: { Directive_Obj: dir, States_Obj: states, ENDING: Ending } } } else { return "Incorrect .RC file" } }
directive = "#" d: word space* v:word_alnumsp nl+ { dir_Count++; dir_Obj = { ['Directive_' + dir_Count]: { "Dir": d, "_text": v } }; return dir_Obj;}
state = (valState looping)*
looping = (loopStart loopEnd*)*
loopStart = beg child: valState + { begin_Count++; children_Count++; child_Count++; return {['loopStart_' + begin_Count]: begin_Count, ['child_' + children_Count]: child } }
loopEnd = end {end_Count++; child_Count--; return { ['loopEnd_' + end_Count]: end_Count }; }
valState = stateName(valStateVal) * nl +
//valStateDec = space+ decState_val:word_alnumsp {valStateDec_Count++; valStateDec_Obj = {['ValStateDec_Obj'+valStateDec_Count]:decState_val}; return valStateDec_Obj;}
stateName = space * state_name:word_alnumsp {if (state_name === 'BEGIN') { begin_Count++; children_Count++; child_Count++; return { ['loopStart_' + begin_Count]: begin_Count } } if (state_name === 'END') { end_Count++; child_Count--; return { ['loopEnd_' + end_Count]: end_Count }; } if (child_Count < 0) { flag = 1; } stateName_Count++; stateName_Obj = { ['StateName_Obj' + stateName_Count]: state_name }; return stateName_Obj; }
valStateVal = space + valState_val:(word_alnumsp comma?)* { valStateVal_Count++; valStateVal_Obj = { ['_attributes_Obj' + valStateVal_Count]: valState_val }; return valStateVal_Obj}
word = wo:letter + { return wo.join("") }
word_alnum = al:alnum + { return al.join("") }
word_alnumsp = alsp:alnumsp + { return alsp.join("") }
beg = space * ([{]) space* nl +
end = space * ([}]) space* nl +
comma = space * [,] space* { return ","}
letter = [a - zA - Z]
alnum = [a - zA - Z0 - 9]
alnumsp = [a - zA - Z0 - 9"'&._()\\|+:]
space = " "
nl = '\n' {valStateVal_Count = -1; return "NL"}
EOL = !. {return "EOF"}

Pymongo MapReduce as sum of subarray element

I'm trying to perform MapReduce on this kind of data set:
{
"_id": "599861ce7ce78cd973746906",
"name": "Macias Rosario",
"col": [
{
"date": "15/03/2016",
"name": "MAGNEATO",
"amount": 313.86
},
{
"date": "08/08/2016",
"name": "FORTEAN",
"amount": 151.06
},
{
"date": "05/11/2014",
"name": "ECRATIC",
"amount": 291.68
}
]
}
Goal is to sum up all amount for name Macias Rosario. Currently I did with my code to group all by subelements this.col.name on this way:
mapper = Code("""
function() {
for (var index = 0; index < this.col.length; ++index) {
var col = this.col[index];
emit(col.name, col.amount );
}
}
""")
reducer = Code("""
function(key, values) {
var total = 0;
for( var i = 0; i < values.length; ++i){
total += values[i];
}
return value.price;
}
""")
result = collection.map_reduce(mapper, reducer, "myresult")
Has anyone have some idea how to reference, or group by this.name and not this.col.name because I don't know anymore and I'm driving nuts?
PS don't suggest me to use aggregate, did that way, want to try on this way also :)
Kind regards,

I hope the following code helps (works in pymongo as well)
This is my map function:
var mapFunction = function() {
for (var idx = 0; idx < this.col.length; idx++) {
var key = this.name;
var value = { amount : this.col[idx].amount };
emit(key, value);
}
};
And the following is my reduce function:
var reduceFunction = function(key, amountVl) {
reduceVal = { amount : 0 };
for (var idx = 0; idx < amountVl.length; idx++) {
reduceVal.amount += amountVl[idx].amount;
}
return reduceVal;
}
With your sample data it produces:
{ "_id" : "Macias Rosario", "value" : { "amount" : 756.6 } }

Group or rearrange array elements based on a condition - javascript

I have an array called 'country' which looks like:
country=[
{
"name": "china",
"id": "country:china"
}, {
"name": "city1",
"id": "country:country1>city1"
}, {
"name": "city2",
"id": "country:country1>city2"
}, {
"name": "city3",
"id": "country:country1>city3"
}, {
"name": "korea",
"id": "country:korea"
}, {
"name": "australia",
"id": "country:australia"
}
]
I am looking at rearranging/grouping the above array as:
countryResult = [ china, country1(city1, city2, city3), korea, australia]
I have written the following code but this does not give me the desired result:
$scope.countryInfo = function(itemData){
var countryResult = [];
for(var i=0; i<itemData.length; i++){
var countryItem = itemData[i];
if(countryItem.id.indexOf('>') > -1){ //Found city
var itemId = countryItem.id.substr(0, countryItem.id.indexOf('>'));
for(var j=0; j<$scope.countryData.length; j++){
if($scope.countryData[j].id == itemId){
var _parentChild = $scope.countryData[j].name + "( " + countryItem.name + " ) ";
countryResult.push(_parentChild);
}
}
}
else{
countryResult.push(countryItem.name);
}
}
return countryResult;
}
The result is coming up like this - [ china, country1(city1), country1(city2), country1(city3)), korea, australia]
Please let me know how to achieve the expected array result.
EDIT: I am just looking at simplifying the array [ china, country1(city1), country1(city2), country1(city3)), korea, australia] to [ china, country1(city1, city2, city3), korea, australia]

I've used reduce with an initial object with a keys property to capture the positions of the elements:
function sorter(countty) {
var obj = country.reduce(function (p, c, i) {
var key, id = c.id.split(/[:>]/);
if (id.length === 3) {
key = id[1];
if (!p[key]) {
p[key] = [];
p.keys.push(key);
}
p[key].push(id[2]);
} else {
p.keys.push(c.name);
}
return p;
}, { keys: [] });
return obj.keys.map(function (el) {
return obj[el] ? el + '(' + obj[el].join(', ') + ')' : el;
});
}
sorter(country);
DEMO

You can use a temporary object and then map the object's properties to the wanted array.
var country = [{ "name": "china", "id": "country:china" }, { "name": "city1", "id": "country:country1>city1" }, { "name": "city2", "id": "country:country1>city2" }, { "name": "city3", "id": "country:country1>city3" }, { "name": "korea", "id": "country:korea" }, { "name": "australia", "id": "country:australia" }],
temp = {},
result;
country.forEach(function (a) {
var b = a.id.split(/\:|\>/g);
temp[b[1]] = temp[b[1]] || [];
if (b[2]) {
temp[b[1]].push(b[2]);
}
});
result = Object.keys(temp).map(function (k) {
if (temp[k].length) {
return k + '(' + temp[k].join(', ') + ')';
}
return k;
});
document.write('<pre>' + JSON.stringify(result, 0, 4) + '</pre>');

I wrote this bit of code to change your first array (in your "EDIT") into your second array, I'm not saying it's clean, but it works:
sorts the array, then tries to figure out if the countries match, and if they have cities that need to be merged...
//an array of countries, some of which include comma delimited cities wrappedin parentheses
var arrayPlaces = ["china", "country1(city1)", "korea", "country1", "country1(city2)", "country1(city3)", "australia", "korea", "home(delicious)", "home(nacho)", "home(plate)"];
//creates an alphabatized version of the array, to simplify finding matching countries
var arrayPlacesSorted = arrayPlaces.sort();
//defines a regular expression (to search for matches countries)
var hasCity = function (sTemp) {
var re = /\(/;
if (re.test(sTemp)) {
return true;
} else {
return false;
}
};
var countryRe = /(.*?)\(.*?\)/;
var cityRe = /.*?\((.*?)\)/;
//function that loops through array, checks for matching countries, combines/adds cities
var groupCities = function (aTemp) {
var currentCountry,
currentCity,
nextCountry,
nextCity;
for (var i = 0; i < (aTemp.length); i++) {
if (hasCity(aTemp[i])) {
currentCountry = countryRe.exec(aTemp[i])[1];
currentCity = cityRe.exec(aTemp[i])[1];
} else {
currentCountry = aTemp[i];
currentCity = false;
}
if (hasCity(aTemp[i + 1])) {
nextCountry = countryRe.exec(aTemp[i + 1])[1];
nextCity = cityRe.exec(aTemp[i + 1])[1];
} else {
nextCountry = aTemp[i + 1];
nextCity = false;
}
if (currentCountry === nextCountry && nextCity && currentCity) {
aTemp[i] = currentCountry + "(" + currentCity + "," + nextCity + ")";
aTemp.splice(i + 1, 1);
i = 0;
} else if (currentCountry === nextCountry && nextCity) {
aTemp[i] = currentCountry + "(" + nextCity + ")";
aTemp.splice(i + 1, 1);
i = 0;
} else if (currentCountry === nextCountry && currentCity) {
aTemp[i] = currentCountry + "(" + currentCity + ")";
aTemp.splice(i + 1, 1);
i = 0;
} else if (currentCountry === nextCountry) {
aTemp[i] = currentCountry;
aTemp.splice(i + 1, 1);
i = 0;
}
}
return aTemp;
};
var result = groupCities(arrayPlacesSorted);
console.log(result);

Merge arrays to object and object to array

So I have little bit of a tricky problem right here:
I'm getting 5x2 arrays from this function
for (var i = 0; i < 5; i++) {
var name = $('.lesson-space:eq( ' + i + ' ) > .lesson').map(function(){return $(this).data('name');}).get();
var color = $('.lesson-space:eq( ' + i + ' ) > .lesson').map(function(){return $(this).data('color');}).get();
};
For each of these 5 repeats I want to put the two arrays into an object like this
{
"name": "deutsch",
"color": "red"
},
{
"name": "mathe",
"color": "blue"
},
{
"name": "sport",
"color": "darkblue"
},
{
"name": "franz",
"color": "yellow"
}
These objects should be put now into in array. So in the end I would like to have 5 arrays (from the first code snipped) put into one array like this
[
[
...
],[
...
],[
...
],[
...
],[
...
]
]
I know it's a bit complicated...

As I understood you want to do something like this
var res = [],
data = {};
for (var i = 0; i < 5; i++) {
data = $('.lesson-space:eq( ' + i + ' ) > .lesson').map(function () {
var name = $(this).data('name');
var color = $(this).data('color');
if (!name || !color) {
return null;
}
return {
name: name,
color: color
}
}).get();
res.push(data);
}

I'm not sure I've understood you requirements correctly, however I think this is what you're looking for
var result = [];
for (var i = 0; i < 5; i++) {
result.push($('.lesson-space:eq('+i+') > .lesson').get().map(function(){
return {
name: $(this).data('name'),
color: $(this).data('name')
};
}));
}
console.log(result);

This should work
var mainArray = [];
for (i = 0; i < name.length; i++) {
var o = {};
o.name = name[i];
o.color = color[i];
mainArray.push([o])
}