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How do I change column default value in PostgreSQL?
...able name, only that table is altered. If ONLY is not specified, the table and all its descendant tables (if any) are altered" postgresql.org/docs/9.3/static/sql-altertable.html
– Yodan Tauber
Dec 20 '15 at 8:41
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How do I get python's pprint to return a string instead of printing?
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The pprint module has a command named pformat, for just that purpose.
From the documentation:
Return the formatted representation of object as a string. indent,
width and depth will be passed to the PrettyPrinter constructor as
formatting param...
Why do we use volatile keyword? [duplicate]
...e compiler doesn't optimize it, then it has to fetch the value of some_int and compare it with 100, in each iteration which obviously is a little bit slow.)
However, sometimes, optimization (of some parts of your program) may be undesirable, because it may be that someone else is changing the value...
Java time-based map/cache with expiring keys [closed]
Do any of you know of a Java Map or similar standard data store that automatically purges entries after a given timeout? This means aging, where the old expired entries “age-out” automatically.
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How do I get a platform-dependent new line character?
...ddition to the line.separator property, if you are using java 1.5 or later and the String.format (or other formatting methods) you can use %n as in
Calendar c = ...;
String s = String.format("Duke's Birthday: %1$tm %1$te,%1$tY%n", c);
//Note `%n` at end of line ^^
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Google access token expiration time
...ve a look at: https://developers.google.com/accounts/docs/OAuth2UserAgent#handlingtheresponse
It says:
Other parameters included in the response include expires_in and
token_type. These parameters describe the lifetime of the token in
seconds...
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raw_input function in Python
... the user (the optional arg of raw_input([arg])), gets input from the user and returns the data input by the user in a string. See the docs for raw_input().
Example:
name = raw_input("What is your name? ")
print "Hello, %s." % name
This differs from input() in that the latter tries to interpret...
Calendar.getInstance(TimeZone.getTimeZone(“UTC”)) is not returning UTC time
...Time(). It is the Date which is getting converted to a string for println, and that conversion will use the default IST timezone in your case.
You'll need to explicitly use DateFormat.setTimeZone() to print the Date in the desired timezone.
EDIT: Courtesy of @Laurynas, consider this:
TimeZone tim...
Javascript dynamically invoke object method from string
...t be used to index type 'FooClass' anyone else ?
– Anand Rockzz
Jun 27 '19 at 4:37
add a comment
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PHP - Get key name of array value
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If you have a value and want to find the key, use array_search() like this:
$arr = array ('first' => 'a', 'second' => 'b', );
$key = array_search ('a', $arr);
$key will now contain the key for value 'a' (that is, 'first').
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