Here is a basic example about clone issue. If we use clone in getClassB method. Return value will be same as new B result. This base class automatically clones attributes of type object or array values of type object recursively. Just inherit your own classes from this base class. Keep in mind that since PHP 5. Want deep cloning without too much hassle?
Moment's string parsing functions like moment string and moment. In contrast, moment. You can check whether the Moment considers the date invalid using moment isValid. You can check the metrics used by isValid using moment parsingFlags , which returns an object.
In addition to the above, As of 2. Additionally, if the Moment is parsed in strict mode, these flags must be empty for the Moment to be valid:. Note: Moment's concept of validity became more strict and consistent between 2. Note: Validity is determined on moment creation. A modified moment i. Note: In case of multiple wrong units the first one is returned because days validity may depend on month, for example. After a moment object is created, all of the inputs can be accessed with creationData method:. You can create a moment object specifying only some of the units, and the rest will be defaulted to the current day, month or year, or 0 for hours, minutes, seconds and milliseconds.
You may be familiar with this pattern from its use in jQuery. Calling these methods without parameters acts as a getter, and calling them with a parameter acts as a setter. For convenience, both singular and plural method names exist as of version 2. Note: From 2. Before 2. Note: Moment date is for the date of the month, and Moment day is for the day of the week.
Note: if you chain multiple actions to construct a date, you should start from a year, then a month, then a day etc. Use moment.
If the value given is from 0 to 6, the resulting date will be within the current Sunday-to-Saturday week. As of 2. This is parsed in the moment's current locale. If the locale assigns Monday as the first day of the week, moment. If Sunday is the first day of the week, moment. Because different locales define week of year numbering differently, Moment. The week of the year varies depending on which day is the first day of the week Sunday, Monday, etc , and which week is the first week of the year.
For example, in the United States, Sunday is the first day of the week. The week with January 1st in it is the first week of the year. In France, Monday is the first day of the week, and the week with January 4th is the first week of the year. The output of moment week will depend on the locale for that moment.
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Before version 2. Because the first day of the first week does not always fall on the first day of the year, sometimes the week-year will differ from the month year. For example, in the US, the week that contains Jan 1 is always the first week. In the US, weeks also start on Sunday. If Jan 1 was a Monday, Dec 31 would belong to the same week as Jan 1, and thus the same week-year as Jan 1.
Dec 30 would have a different week-year than Dec Gets the number of weeks in the current moment's year, according to ISO weeks. Units are case insensitive, and support plural and short forms: year years, y , month months, M , date dates, D , hour hours, h , minute minutes, m , second seconds, s , millisecond milliseconds, ms. Once you have a Moment , you may want to manipulate it in some way.
There are a number of methods to help with this.
This allows you to do crazy things like the following. Note: It should be noted that moments are mutable. Calling any of the manipulation methods will change the original moment. If you want to create a copy and manipulate it, you should use moment clone before manipulating the moment. More info on cloning. This is a pretty robust function for adding time to an existing moment.
To add time, pass the key of what time you want to add, and the amount you want to add. If you want to add multiple different keys at the same time, you can pass them in as an object literal. If the day of the month on the original date is greater than the number of days in the final month, the day of the month will change to the last day in the final month. There are also special considerations to keep in mind when adding time that crosses over daylight saving time.
If you are adding years, months, weeks, or days, the original hour will always match the added hour. If you are adding hours, minutes, seconds, or milliseconds, the assumption is that you want precision to the hour, and will result in a different hour. It has been deprecated in favor of moment add Number, String. Weeks, quarters, and years are converted to days or months, and then rounded to the nearest integer. This is exactly the same as moment add , only instead of adding time, it subtracts time.
It has been deprecated in favor of moment subtract Number, String. Note that in order to make the operations moment. Note: moment startOf 'week' was added in version 2. Note: moment startOf 'isoWeek' was added in version 2. Note: moment startOf 'date' was added as an alias for day in 2.
This is the same as moment startOf , only instead of setting to the start of a unit of time, it sets to the end of a unit of time. Note: moment endOf 'week' was added in version 2.
Note: This function has been deprecated in 2. Consider moment.
Limits the moment to a maximum of another moment value. Sometimes, server clocks are not quite in sync with client clocks. This ends up displaying humanized strings such as "in a few seconds" rather than "a few seconds ago". You can prevent that with moment max :. Limits the moment to a minimum of another moment value. Sets a flag on the original moment to use local time to display a moment instead of the original moment's time. Sets a flag on the original moment to use UTC to display a moment instead of the original moment's time.
Note: Unlike moment. Setting the UTC offset by supplying minutes. The offset is set on the moment object that utcOffset is called on.
If you are wanting to set the offset globally, try using moment-timezone. Note that once you set an offset, it's fixed and won't change on its own i. If the input is less than 16 and greater than , it will interpret your input as hours instead. The utcOffset function has an optional second parameter which accepts a boolean value indicating whether to keep the existing time of day. Passing false the default will keep the same instant in Universal Time, but the local time will change.
Passing true will keep the same local time, but at the expense of choosing a different point in Universal Time. One use of this feature is if you want to construct a moment with a specific time zone offset using only numeric input values:. This is the most robust display option. It takes a string of tokens and replaces them with their corresponding values.
They display 3 significant digits and the rest is filled with zeros. Because preferred formatting differs based on locale, there are a few tokens that can be used to format a moment based on its locale. There are upper and lower case variations on the same formats. The lowercase version is intended to be the shortened version of its uppercase counterpart.