I am trying to filter by Date. The answer on this post worked for me by boindiil
AngularJS ngTable filtering by Date
The only problem I am having is that the filter for the Date is Case sensitive. How do I make it not to be case sensitive? When you run his code and you type lowercase j or f for the date, no results are shown. You have to type exactly what it is.
The Name filter is not case sensitive. you can type lowercase or uppercase it works.
You just need to add a check in your filter for lowercase as well.
Just replace
if($filter('date')(value.Date).indexOf(dateString) >= 0) {
filtered.push(value);
}
with
var lower = $filter('date')(value.Date.toDateString().toLowerCase()).indexOf(dateString);
var normal = $filter('date')(value.Date).indexOf(dateString);
if(normal >= 0 || lower >= 0) {
filtered.push(value);
}
Related
Im just wondering. is it ok to combine years,month, and day of two date and make a comparison based on the combination.
eg:
Date A: 12th-January-2019
Date B: 24th-December-2018
Based on the above date, i could combine the year,month, and day as follow:
Date A: 20190112
Date B: 20181224
So based on the numbers, i could do logic like below to compare which date comes first:
if(Date A > Date B) {
output("Date A is the latest")
}
i would like to implement this method just to compare which is the latest date.
are there any problem of doing so.
java.time
Since you are using Java, I suggest that you take advantage of java.time, the modern Java date and time API.
String[] dateStringsFromDatabase = {
"2018/12/19",
"2017-02-01",
"2018.03.04",
"25-12-2016", // reversed
"2019\\09\\12",
"2014:03:01"
};
List<LocalDate> parsedDates = new ArrayList<>(dateStringsFromDatabase.length);
for (String dateString : dateStringsFromDatabase) {
// No matter which delimiter is used, replace it with a hyphen
String text = dateString.replaceAll("\\W", "-");
try {
parsedDates.add(LocalDate.parse(text));
} catch (DateTimeParseException dtpe) {
System.out.println(dateString + " not parsed: " + dtpe.getMessage());
}
}
Output:
25-12-2016 not parsed: Text '25-12-2016' could not be parsed at index 0
What this approach buys you is validation of the dates even though they come with all different delimiters. Especially in this situation I believe that you should want to validate that your strings are within the expected variations. Otherwise you risk that a date with the numbers reversed ends up as a date in year 2512, for example. You want to catch that before it happens.
Example of comparing which comes first:
for (int i = 1; i < parsedDates.size(); i++) {
LocalDate dateA = parsedDates.get(i - 1);
LocalDate dateB = parsedDates.get(i);
if (dateA.isAfter(dateB)) {
System.out.format("%s is later than %s%n", dateA, dateB);
}
}
Output:
2018-12-19 is later than 2017-02-01
2019-09-12 is later than 2014-03-01
Link: Oracle tutorial: Date Time explaining how to use java.time.
if gpa[12] < gpa[1] {
print(gpa[12])
} else {
switch gpa {
case gpa[1]:
print(gpa)
}
}
I don't understand how to fix or what this may mean? I am on Xcode 9
What I am doing is trying to have values of GPA switched. I am using cases to switch out. Sorry, I'm new and it's hard for me to explain what I mean.
switch gpa
here gpa is an array of doubles, [Double]
case gpa[1]:
here the case is using a single Double value.
What the error message is telling you is that you can not ask a switch to compare a Double value ( gpa[1] ) to the entire array of gpa's ( gpa ) because they are different types.
Hello guys I'm new here and right now I'm learning Swift by coding some fancy algorithms, which comes to my mind while reading Apples Swift book.
I was trying to compress (automatically downcast) any IntegerType value.
Here is a little snippet of my Code which almost works fine except for one case:
switch signedValue
{
case Int64(Int8.min)...Int64(Int8.max): compressedValue = Int8(signedValue)
case (Int64(Int8.max) + 1)...Int64(UInt8.max): compressedValue = UInt8(signedValue)
case Int64(Int16.min)...Int64(Int16.max): compressedValue = Int16(signedValue)
case (Int64(Int16.max) + 1)...Int64(UInt16.max): compressedValue = UInt16(signedValue)
case Int64(Int32.min)...Int64(Int32.max): compressedValue = Int32(signedValue)
case (Int64(Int32.max) + 1)...Int64(UInt32.max): compressedValue = UInt32(signedValue)
case Int64(Int.min)...Int64(Int.max): compressedValue = Int(signedValue) // range bug #1 - workaround '..<'
default: compressedValue = signedValue
}
Assume signedValue is of Type Int64 and the input value is = 10_000_000_000.
This will lead to a runtime error (in Playground):
Execution was interrupted, reason: EXC_BAD_INSTRUCTION ...
Could anyone help me out to understand what exactly is happening here. There is an workaround for this problem. Instead of '...' I could use '..<' but this not how the range should be.
Unlike intervals (which have two flavours, half-open or closed), Range is only ever half-open. So when you write 1...5, the ...function increments the right-hand argument in order to create a half-open range 1..<6.
The consequence of this is you can’t have a range that spans the entire length of an integer type, since 1...Int.max will result in an attempt to increment Int.max, and an overflow error. You get a similar error with let s = "hello"; let r = s.startIndex...s.endIndex
All is not lost, however, since you shouldn’t be using ranges anyway, this is a job for ClosedInterval. Since the ... operator is used for both, and defaults to ranges (for overloading precedence reasons) you need to explicitly identify the type:
let i64interval: ClosedInterval = Int64(Int64.min)...Int64(Int64.max)
switch signedValue {
// etc
case i64interval: compressedValue = Int(signedValue)
default: compressedValue = signedValue
}
Look at the documentation for the Range Type. It has the following little nugget of information that I never noticed before:
if T has a maximal value, it can serve as an endIndex, but can never be contained in a Range.
T, in that quote, is the type of value in the Range. So if you have a Range of Ints, the max value of the Int cannot be contained in the Range.
That's why it works if you put the ..< in there, instead of ....
Good question, by the way...
I am using ColdFusion 9.0.1 and some database that I cannot change.
I am accessing a database that stores a date as an eight digit numeric with zero decimal places like this:
YYYYMMDD
I need to be able to read the date, add and subtract days from a date, and create new dates. I am looking for a ColdFusion solution to efficiently (not much code) to convert the date to our standard format, which is
MM/DD/YYYY
And then convert it back into the database's format for saving.
I need to code this in such a way that non-ColdFusion programmers can easily read this and use it, copy and modify it for other functions (such as adding a day to a date). So, I am not looking for the most least amount of code, but efficient and readable code.
Can you suggest anything that would make this code block more flexible, readable, or more efficient (less code)?
<cfscript>
// FORMAT DB DATE FOR BROWSER
DateFromDB = "20111116";
DatedToBrowser = createBrowserDate(DateFromDB);
writeOutput(DatedToBrowser);
function createBrowserDate(ThisDate) {
ThisYear = left(ThisDate, 4);
ThisMonth = mid(ThisDate, 4, 2);
ThisDay = right(ThisDate, 2);
NewDate = createDate(ThisYear, ThisMonth, ThisDay);
NewDate = dateFormat(NewDate, "MM/DD/YYYY");
return NewDate;
}
// FORMAT BROWSER DATE FOR DB
DateFromBrowser = "11/16/2011";
DateToDB = createDBDate(DateFromBrowser);
writeDump(DateToDB);
function createDBDate(ThisDate) {
ThisYear = year(ThisDate);
ThisMonth = month(ThisDate);
ThisDay = day(ThisDate);
NewDate = "#ThisYear##ThisMonth##ThisDay#";
return NewDate;
}
</cfscript>
First find who ever did the database and kick them in the nads...
Personally I'd Convert with sql so my code only dealt with date objects.
Select Convert(DateTime, Convert(VarChar(8),DateTimeInventedByIdjitColumn))
From SomeTable
As stated by our peers, store dates as dates.
'08/06/2011' could be 8th of june of the 6th of August depending on locale.
20111643 is a valid integer..
Not using a proper date type is just a massive collection of features and bugs that at best are waiting to happen.
You can actually rewrite each function into 1 line of code.
function createBrowserDate(ThisDate) {
return mid(ThisDate,4,2) & "/" & right(ThisDate,2) & "/" & left(ThisDate,4);
}
and
function createDBDate(ThisDate) {
return dateFormat( ThisDate, "YYYYMMDD" );
}
Don't keep dates as strings - keep dates as dates and format them when you need to.
If you can't correct the database to use actual date columns (which you should if you can), then you can use these two functions to convert to/from YYYYMMDD and a date object:
function parseYMD( YYYYMMDD )
{
if ( ! refind('^\d{8}$' , Arguments.YYYYMMDD ) )
throw "Invalid Format. Expected YYYYMMDD";
return parseDateTime
( Arguments.YYYYMMDD.replaceAll('(?<=^\d{4})|(?=\d{2}$)','-') );
}
function formatYMD( DateObj )
{
return DateFormat( DateObj , 'yyyymmdd' );
}
By using date objects it means that any level of developer can work with them, without needing to care about formatting, via built-in functions like DateAdd, DateCompare, and so on.
I'm not a regular expression fan since it's not that readable to me.
Since you're using CF9, I'd typed the argument and specify the returntype of the functions to be even more readable for the next person picking up your code.
First, right after I read the date from DB, I'd parse it to a Date object using parseDBDate()
Date function parseDBDate(required String dbDate)
{
var yyyy = left(dbDate, 4);
var mm = mid(dbDate, 4, 2);
var dd = right(dbDate, 2);
return createDate(yyyy , mm, dd);
}
Once you have the date object, you can use all those built-in Date functoin like DateAdd() or DateDiff().
Call browserDateFormat() right before you need to display it.
String function browserDateFormat(required Date date)
{
return dateFormat(date, "MM/DD/YYYY");
}
Call dBDateFormat() inside <cfqueryparam value=""> when it's time to persist to DB
String function dBDateFormat(required Date date)
{
return dateFormat(date, "YYYYMMDD");
}
One liner :)
myDateString = "20110203";
myCfDate = createObject("java","java.text.SimpleDateFormat").init("yyyyMMdd").parse(myDateString,createObject("java","java.text.ParsePosition").init(0*0));
If you want to parse different patterns, change "yyyyMMdd" to any other supported pattern.
http://download.oracle.com/javase/1.5.0/docs/api/java/text/SimpleDateFormat.html
The ParsePosition is used to say where to start parsing the string.
0*0 is shorthand for JavaCast("int",0) - in the Adobe cf engine, 0 is a string, until you apply math to it, then it becomes a Double, which the ParsePosition constructor supports. Technically, it constructs with an int, but cf is smart enough to downgrade a Double to an int.
http://download.oracle.com/javase/1.5.0/docs/api/java/text/ParsePosition.html
With Linq to Entities, I am trying to query a Log table to find rows near a matching row. I am having trouble with adding a date inside the query. This is what I have so far.
from
l in objectSet.Logs
let
match = objectSet.Logs.Where(whatever).FirstOrDefault()
where
l.Timestamp > (match.Timestamp - twoHours)
&& l.Timestamp < (match.Timestamp + twoHours)
select
l
Leaving out the "whatever" condition that finds the row I'm interested in, "twoHours" has variably been a time span, a .AddHours() function and so forth. I haven't found the right way that EF can generate SQL that adds the value from a field (match.Timestamp) to a constant.
The obvious solution is to do the "match" query first and then use the literal value in a second query, but I have simplified the code example here to the main problem (adding dates in the query) and in actual fact my query is more complex and this would not be ideal.
Cheers
You can generate an AddHours using the EntityFunctions class.
from
l in objectSet.Logs
let
match = objectSet.Logs.Where(whatever).FirstOrDefault()
where
(l.Timestamp > EntityFunctions.AddHours(match.Timestamp, -1 * twoHours))
&& // ...
select
l
However, don't expect this WHERE to be optimized with an index unless you have an expression index on the column.
EntityFunctions is deprecated in favor of DbFunctions
public int GetNumUsersByDay(DateTime Date)
{
using (var context = db)
{
var DateDay = new DateTime(Date.Year, Date.Month, Date.Day);
var DateDayTomorrow = DateDay.AddDays(1);
return context.Users.Where(m => DbFunctions.AddHours(m.DateCreated,-5) >= DateDay && m.DateCreated < DateDayTomorrow).Count();
}
}
As it was described in this article - http://www.devart.com/blogs/dotconnect/?p=2982#first, use parameters (declare variable) instead of DateTime using in your queries.