javascript - Compare dates on moment.js -


i working library moment.js difference in months between 2 dates .. code works fine .. takes month when same day eg: first date = 2017-08-14, second date = 2017-09-14 ... in case takes account full month, question ahy way if second date was: 2017-09-12 example .. take account month?

i leave little code have.

var date1 = moment('2017-08-14');  var date2 = moment('2017-09-12');  var result = date2.diff(date1, 'months');  console.log(result);
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>

according documentation .diff() round down when value positive, , round when value negative (i.e. positive values < 1 rounded down 0):

by default, moment#diff return number rounded towards 0 (down positive, negative). if want floating point number, pass true third argument.

if want floating point number, this:

var result = date2.diff(date1, 'months', true);

and can apply own rounding up/down preference. if want round nearest month, use:

var result = math.round(date2.diff(date1, 'months', true)); 

var date1 = moment('2017-08-14');  var date2 = moment('2017-09-12');  var result = date2.diff(date1, 'months', true);  console.log(result);
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>

on related note, if want detect if a month boundary has been crossed between 2 dates (e.g. want 31st august 2017 vs 1st september 2017 counted 1 month difference because month changes august september), can extract month dates using .month() , calculate difference yourself:

var date1 = moment('2017-08-31');  var date2 = moment('2017-09-01');  var result = date2.month() - date1.month();  console.log(result);
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.min.js"></script>


Comments

Post a Comment

Popular posts from this blog

android - InAppBilling registering BroadcastReceiver in AndroidManifest -

i'm implementing inapp billing in android app. works well, however, i'm trying decouple broadcast receiver activity manifest. suggestion in android's trivialdrive sample: // important: dynamically register broadcast messages updated purchases. // register receiver here instead of <receiver> in manifest // because call getpurchases() @ startup, therefore can ignore // broadcasts sent while app isn't running. // note: registering listener in activity bad idea, done here // because sample. regardless, receiver must registered after // iabhelper setup, before first call getpurchases(). currently there's class extends broadcastreceiver : public class iabbroadcastreceiver extends broadcastreceiver { /** * intent action receiver should filter for. */ public static final string action = "com.android.vending.billing.purchases_updated"; private final iabbroadcastlistener mlistener; public iabbroadcastreceiver(iabbroadcastlistener listener) { m...
Read more

python Tkinter Capturing keyboard events save as one single string -

is possible store keyboard events 1 string? code below stores 1 char , prints it. card reader or bar code reader, contains collection of character/ string not 1 character @ time. goal save char pressed text variable. from tkinter import * root = tk() def key(event): text= event.char text+= event.char print ("pressed", text) def callback(event): frame.focus_set() print ("clicked at", event.x, event.y) frame = frame(root, width=100, height=100) frame.bind("<key>", key) frame.bind("<button-1>", callback) frame.pack() root.mainloop() currently, creating text variable , everytime key() function gets called, , text stores last character typed. you can define text module level variable , , use module level text inside key function - text = '' def key(event): global text text+= event.char print("pressed", text)
Read more

sql server - Why does Linq-to-SQL add unnecessary COUNT()? -

here tables: create table customer ( cid int primary key, name varchar(32) ) create table ord ( oid int primary key, cid int foreign key references customer, address varchar(20) ) here's linq-to-sql statement: var aaa = c in db.customer select new { c, o = c.ord.tolist() }; and here's inexplicable query generated linq-to-sql: select [t0].[cid] [cid], [t0].[name] [name], [t1].[oid] [oid], [t1].[cid] [cid2], [t1].[address] [address], (select count(*) [dbo].[ord] [t2] [t2].[cid] = [t0].[cid]) [value] [dbo].[customer] [t0] left outer join [dbo].[ord] [t1] on [t1].[cid] = [t0].[cid] order [t0].[cid], [t1].[oid] i want understand how rid of count(*) part. it's entirely uncalled for! linq needs count(*) in order determine number of entries returned o = c.ord.tolist() .
Read more