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date functions added

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VaclavT
2021-05-20 23:03:03 +02:00
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@@ -70,6 +70,16 @@
=> "2021-03-13 19:53:01"`|
|`(str-to-date string format)`|Converst string to time of secs since epoch. |`>>> (str-to-date "2021-03-13 19:53:01" "%Y-%m-%d %H:%M:%S") => 1615665181`|
|`(date-add date amount unit)`|Add number of units to date. A unit is one of 'year', 'month', 'day', 'hour', 'minute' or 'second'|`>>> (date-to-str (date-add (str-to-date "2021-03-13 19:53:01" "%Y-%m-%d %H:%M:%S") 10 "day") "%Y-%m-%d %H:%M:%S") => "2021-03-23 20:53:01"`|
|`start-of-day datetime`||`>>> (start-of-day (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1620864000`|
|`end-of-day datetime`||`>>> (end-of-day (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1620950399`|
|`start-of-month datetime`||`>>> (start-of-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1619827200`|
|`start-of-next-month datetime`||`>>> (end-of-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1622505599`|
|`end-of-next-month datetime`||`>>> (start-of-next-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1622505600`|
|`end-of-month datetime`||`>>> (end-of-next-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1625097599`|
|`start-of-prev-month datetime`||`>>> (start-of-prev-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1617235200`|
|`end-of-prev-month datetime`||`>>> (end-of-prev-month (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1619827199`|
|`start-of-year datetime`||`>>> (start-of-year (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1609459200`|
|`end-of-year datetime`||`>>> (end-of-year (str-to-date "2021-05-13 10:32:12" "%Y-%m-%d %H:%M:%S")) => 1640995199`|
|`(debug ..)`|||
|`(display ..)`|||
|`(string-replace source substr replacement)`|Replace a substring with a replacement string in a source string|`>>> (string-replace "abcdefg" "de" "DE") => "abcDEfg"`|