...ld be only what's needed" I get the impression these should be of the same order. Closures are not cheap, the runtime will have to keep the whole call tree of the single-threaded application in memory ("emulating stacks" so to say) and will be able to clean up when a leaf of tree gets released as th...

... cache requires validation using conditional headers. This is required in order to refresh the cache content to avoid having the results of a POST not be reflected in the responses to requests until after the lifetime of the object expires. ...

...o). One of the biggest advantages with functional programming is that the order of execution of side-effect-free functions is not important. For example, in Erlang this is used to enable concurrency in a very transparent way. And because functions in functional languages behave very similar to mat...

... not redirect stderr to the file, but cmd >> file 2>&1 does. Order matters. In the first case, stderr is redirected to the stdout of the shell (possibly a tty if the command is entered interactively), and then stdout is directed to the file. In the second case, stdout is directed to ...

I have a data frame df and I use several columns from it to groupby : 7 Answers 7 ...

...in ('P', 'U') and table_name = :r_table_name and owner = :r_owner ) order by table_name, constraint_name Where r_owner is the schema, and r_table_name is the table for which you are looking for references. The names are case sensitive Be careful because on the reports tab of Oracle SQL D...

...RL+V,CTRL+[[31mERROR MESSAGE IN RED' ie, press CTRL+V and then CTRL+[ in order to get a "raw" ESC character when escape interpretation is not available If done correctly, you should see a ^[. Although it looks like two characters, it is really just one, the ESC character. You can also press CTRL+V...

...redefined in subshells, not for environment variables that are inherited. /etc/profile: this is loaded before ~/.profile, but is otherwise equivalent. Use it when you want the variable to apply to terminal programs launched by all users on the machine (assuming they use bash). ~/.MacOSX/environment....

... add "select * from (" at beginning and ") as output order by exact_row_count desc" at the end of generated query after removing last UNION to get order by table count desc – Raghavendra Jun 22 '18 at 5:42 ...

... This answer comes a little late, but it completes the response. In order to avoid a field from an entity to be persisted in DB one can use one of the two mechanisms: @Transient - the JPA annotation marking a field as not persistable transient keyword in java. Beware - using this keyword, w...