date

问题 I have spent a couple of hours researching this but I am getting nowhere unfortunately. I am trying to get a subset of data by using sqldf to query a data frame, result. This is the structure of result: > str(result) 'data.frame': 316125 obs. of 6 variables: $ ID : int 1 2 3 4 5 6 7 8 9 10 ... $ dt : Date, format: "1999-12-31" "1999-12-31" "1999-12-31" "1999-12-31" ... $ Ticker: chr "0111145D US" "0113357D US" "0202445Q US" "0203524D US" ... $ px : num 32.5 20.6 34.2 21.4 11 ... $ High : num

问题 I am trying to understand the level of support of <input type="date"> in iOS. I tested it with an iPhone 4 with iOS 7.0.3, even if I specify a min attribute the date picker lets me choose a date before the constraint. The HTML code is this: <input type="date" id="checkIn" name="checkIn" class="form-control input-sm" value="2014-05-26" min="2014-05-26" data-date-format="YYYY-MM-DD" data-date-minDate="2014-05-26" placeholder="yyyy-mm-dd"> The data attributes are set for this datepicker but I

问题 This question already has answers here : Calculate Years, Months, weeks and Days (7 answers) Closed 4 years ago . I want exact Year, Month and Day elapsed between two dates. DateTime startDate = new DateTime(1974, 8, 15); DateTime endDate = DateTime.Now.ToLocalTime(); I wish to find Number of Years, Months and Days elapsed between the above two days using C#? My Expected Output Years: 68 Months: 10 Days: 23 I referred one of the post, in that they explained about only days Calculate

问题 This question already has answers here : Calculate Years, Months, weeks and Days (7 answers) Closed 4 years ago . I want exact Year, Month and Day elapsed between two dates. DateTime startDate = new DateTime(1974, 8, 15); DateTime endDate = DateTime.Now.ToLocalTime(); I wish to find Number of Years, Months and Days elapsed between the above two days using C#? My Expected Output Years: 68 Months: 10 Days: 23 I referred one of the post, in that they explained about only days Calculate

问题 I am trying to convert format of date using Javascript. I found a method called toLocaleFormat. <script> var today = new Date(); var formatted_string = today.toLocaleFormat('%d/%m/%Y at %H:%M:%S %p (%Z)'); document.write(formatted_string); </script> But its working only in firefox. I want to know an alternate method for this, which will work on all the browsers. Kindly help me to do this. Thanks in advance. 回答1: JavaScript in itself doesnt have advanced parse and formatting functions for

问题 I am trying to convert format of date using Javascript. I found a method called toLocaleFormat. <script> var today = new Date(); var formatted_string = today.toLocaleFormat('%d/%m/%Y at %H:%M:%S %p (%Z)'); document.write(formatted_string); </script> But its working only in firefox. I want to know an alternate method for this, which will work on all the browsers. Kindly help me to do this. Thanks in advance. 回答1: JavaScript in itself doesnt have advanced parse and formatting functions for

问题 I am trying to convert format of date using Javascript. I found a method called toLocaleFormat. <script> var today = new Date(); var formatted_string = today.toLocaleFormat('%d/%m/%Y at %H:%M:%S %p (%Z)'); document.write(formatted_string); </script> But its working only in firefox. I want to know an alternate method for this, which will work on all the browsers. Kindly help me to do this. Thanks in advance. 回答1: JavaScript in itself doesnt have advanced parse and formatting functions for

问题 This question already has answers here : Get Last Friday of Month in Java (16 answers) Closed 2 years ago . I want to get the last sunday of any given month, and its working to a point however on some inputs if the sunday is the first day of next month it shows that date instead of the same month's last week. Here is what public static String getLastSunday(int month, int year) { Calendar cal = Calendar.getInstance(); cal.set(year, month, 1); if (leap(year)) { cal.add(Calendar.DAY_OF_MONTH, -

问题 I have a data frame with two columns - one is the Start date the other is the End date. I need to get a new data frame with two columns - a Date column and a column which is the count of observations from the first data frame where the date is between Start and End. Have: dates<-data.frame("Start"=seq(as.Date("2017/1/1"),by="day", length.out = 5),"End"=seq(as.Date("2017/1/3"),by="day", length.out = 5)) Start End 2017-01-01 2017-01-03 2017-01-02 2017-01-04 2017-01-03 2017-01-05 2017-01-04 2017