Linked to, but not explicitly mentioned here, is exactly when __all__ is used. It is a list of strings defining what symbols in a module will be exported when from <module> import * is used on the module. For example, the following code in a foo.py explicitly exports the symbols bar and baz: __all__ = … Read more
Try: INSERT INTO table1 ( column1 ) SELECT col1 FROM table2 This is standard ANSI SQL and should work on any DBMS It definitely works for: Oracle MS SQL Server MySQL Postgres SQLite v3 Teradata DB2 Sybase Vertica HSQLDB H2 AWS RedShift SAP HANA Google Spanner
If we split it up, the mess is equal to: ++[[]][+[]] + [+[]] In JavaScript, it is true that +[] === 0. + converts something into a number, and in this case it will come down to +”” or 0 (see specification details below). Therefore, we can simplify it (++ has precendence over +): ++[[]][0] … Read more
I believe that all the previously proposed solutions (apart from those that require specific implementations) result in the comments being included in the output HTML, even if they are not displayed. If you want a comment that is strictly for yourself (readers of the converted document should not be able to see it, even with … Read more
for i in $(seq 1 $END); do echo $i; done edit: I prefer seq over the other methods because I can actually remember it 😉
There are 5 6 NINE (or 63*, depending how you count) different ways to write multi-line strings in YAML. TL;DR Use > most of the time: interior line breaks are stripped out, although you get one at the end: key: > Your long string here. Use | if you want those linebreaks to be preserved … Read more
The *args and **kwargs is a common idiom to allow arbitrary number of arguments to functions as described in the section more on defining functions in the Python documentation. The *args will give you all function parameters as a tuple: def foo(*args): for a in args: print(a) foo(1) # 1 foo(1,2,3) # 1 # 2 … Read more
foo=”Hello” foo=”${foo} World” echo “${foo}” > Hello World In general to concatenate two variables you can just write them one after another: a=”Hello” b=’World’ c=”${a} ${b}” echo “${c}” > Hello World