javascript - Loop through array of objects and return sum of each total values by object element id -


i'm calculating taxes complicate invoicing approach. can't explain whole process if have questions answer best can.

i come array of objects in js:

[  {row_id: "20003859", expense_id: "429", tax_select: "tax1", tax_id: "1", tax_name: "gst 5%", tax_no: "", tax_value: "13.23"},   {row_id: "20003859", expense_id: "429", tax_select: "tax2", tax_id: "3", tax_name: "qst 9.975%", tax_no: "", tax_value: "26.38"},   {row_id: "20003840", expense_id: "409", tax_select: "tax1", tax_id: "1", tax_name: "gst 5%", tax_no: "", tax_value: "13.23"},   {row_id: "20003840", expense_id: "409", tax_select: "tax2", tax_id: "3", tax_name: "qst 9.975%", tax_no: "", tax_value: "26.38"},  {row_id: "20003870", expense_id: "419", tax_select: "tax1", tax_id: "2", tax_name: "hst 13%", tax_no: "", tax_value: "34.39"} ]

as can see have 3 tax_ids: 1, 2 , 3. can have many sake of simplicity put 3.

i need loop through array of objects , come array of objects having totals tax_id:

[  {tax_name: "gst 5%", total_tax: sum of tax_value tax_id = 1},  {tax_name: "qst 9.975%", total_tax: sum of tax_value tax_id = 3},  {tax_name: "hst 13%", sum of tax_value tax_id = 2} ]

after can loop through array , display totals of each tax, adding subtotal , display total invoice.

also, should sort them tax_select it's thing can live with.

i have tried to: selected_taxes first array of objects

 (i = 0; < selected_taxes.length; i++){         var sum = 0;     $.each( selected_taxes[i], function( tax_id, tax_value ) {         sum += tax_value;     });     console.log(sum);  }

but no luck.

many or suggestions.

i think array.prototype.reduce best bet this:

var totals = data.reduce(function(c,x){     if(!c[x.tax_id]) c[x.tax_id] = {         tax_name: x.tax_name,         tax_id: x.tax_id,          total_tax: 0     };     c[x.tax_id].total_tax += number(x.tax_value);     return c; }, {});

this approach generates object has, properties, tax id numbers. if want flat array that, can convert array after fact:

var totalsarray = []; for(var taxid in totals){     totalsarray.push(totals[taxid]): }

demonstration: http://jsfiddle.net/3jajc/1/


Comments

Post a Comment

Popular posts from this blog

Android layout hidden on keyboard show -

i have strange problem layout. when tap on edittext , keyboard shown edittext stay on bottom , when tap on to hide keyboard , keyboard hides , edittext go should when want input text. when tap again, keyboard shown , edittext goes down behind keyboard... <relativelayout android:layout_width="match_parent" android:layout_height="match_parent" > <scrollview android:layout_width="match_parent" android:layout_height="fill_parent" android:above="@+id/rl_commands"> <textview android:layout_width="match_parent" android:layout_height="wrap_content"/> </scrollview> <relativelayout android:layout_width="match_parent android:layout_height="24dp" android:id="@+id/rl_commands" android:alignparentbottom="true">
Read more

google app engine - 403 Forbidden POST - Flask WTForms -

i have flask application running on google app engine. trying submit form built using wtform , keep getting following error. 403 forbidden: don't have permission access requested resource. either read-protected or not readable server. location.html (part of code) <form method=post action="/home/location"> .... <button type="submit" class="btn btn-primary" value="submit"> directions </button> </form> main.py @app.route('/home/location', methods=['post', 'get']) def location(): form = cfcdirections.direction(request.form) print(request.method) if request.method == 'post' , form.validate(): print("after if") directions = cfcdirections() street_no = directions.no street = directions.street suburb = directions.suburb postcode = directions.postcode
Read more

c - Why would PK11_GenerateRandom() return an error -8023? -

i looking through internet trying find source of pk11_generaterandom() function see why function fail. have program uses function when moved new flavor of linux, fails after forking ( fork() ) since not believe there problem nss, suspect doing incorrectly disregarded in older versions of linux new 1 there issue. the openssl package same on 'good' , 'bad' server: openssl 0.9.8e-fips-rhel5 01 jul nss rpm differs though. 'good' has nss-3.12.2.0-2.el5 and bas has version nss-3.15.3-4.el5_10 the 'good' server uses quite obsolete linux: linux 2.6.18-128.el5 #1 smp wed jan 21 08:45:05 est 2009 x86_64 x86_64 x86_64 gnu/linux enterprise linux enterprise linux server release 5.3 (carthage) red hat enterprise linux server release 5.3 (tikanga) the 'bad' server newer: linux bad 2.6.18-371.4.1.el5 #1 smp wed jan 29 11:05:49 pst 2014 x86_64 x86_64 x86_64 gnu/linux oracle linux server release 5.10 red hat enterprise linux server release
Read more