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Stack Memory vs Heap Memory [duplicate]
...ember to do so. Running out of heap memory can (will?) result in a std::bad_alloc.
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What's the difference between REST & RESTful
...is the architecture and RESTful an adjective?
– manei_cc
May 19 '14 at 21:07
4
@manei_cc: Althoug...
How to save an activity state using save instance state?
...e when going through documentation. 1 vote up :)
– AZ_
Nov 26 '10 at 5:13
21
I dont think this an...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...z = {**x, **y}
In Python 2, (or 3.4 or lower) write a function:
def merge_two_dicts(x, y):
z = x.copy() # start with x's keys and values
z.update(y) # modifies z with y's keys and values & returns None
return z
and now:
z = merge_two_dicts(x, y)
In Python 3.9.0a4 or greater...
psql: FATAL: role “postgres” does not exist
... which will just use the latest version.
start postgres server manually: pg_ctl -D /usr/local/var/postgres start
To start server at startup
mkdir -p ~/Library/LaunchAgents
ln -sfv /usr/local/opt/postgresql/*.plist ~/Library/LaunchAgents
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.post...
How to add 'ON DELETE CASCADE' in ALTER TABLE statement
...t instead of modify constraint.
Now this is the command:
ALTER TABLE child_table_name
ADD CONSTRAINT fk_name
FOREIGN KEY (child_column_name)
REFERENCES parent_table_name(parent_column_name)
ON DELETE CASCADE;
s...
How to explain callbacks in plain english? How are they different from calling one function from ano
...n the call-back-function for further processing. example: func1(a, callback_func){ v = a + 1} and there is predefined call back function: callback_func(v){return v+1;} this will increase a by 2, so if you pass argument of integer 4 in "a" parameter, the callback_funct will return 6 as result. Read t...
How to log something in Rails in an independent log file?
...t like the usual Rails logger:
class User < ActiveRecord::Base
def my_logger
@@my_logger ||= Logger.new("#{Rails.root}/log/my.log")
end
def before_save
my_logger.info("Creating user with name #{self.name}")
end
end
Here I used a class attribute to memoize the logger. This way ...
Optional Parameters in Go?
...amp;Foobar{}
// ... (write initializations with default values)...
for _, op := range options{
err := op(fb)
if err != nil {
return nil, err
}
}
return fb, nil
}
where each option is a function which mutates the Foobar. Then provide convenient ways for your user to use or...
How do I set up IntelliJ IDEA for Android applications?
...n a Mac, the Java JDK appears at /Library/Java/JavaVirtualMachines/jdk1.7.0_09.jdk
– emrys57
Nov 22 '12 at 14:13
1
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