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How to clear variables in ipython?
...r @ErdemKAYA comment.
To erase a variable, use the magic command:
%reset_selective <regular_expression>
The variables that are erased from the namespace are the one matching the given <regular_expression>.
Therefore
%reset_selective -f a
will erase all the variables containing a...
How to do an INNER JOIN on multiple columns
...n once by giving the joined tables an alias, as in the following example:
SELECT
airline, flt_no, fairport, tairport, depart, arrive, fare
FROM
flights
INNER JOIN
airports from_port ON (from_port.code = flights.fairport)
INNER JOIN
airports to_port ON (to_port.code = flights.tair...
Export from sqlite to csv using shell script
...qlite3
You have a separate call to sqlite3 for each line; by the time your select runs, your .out out.csv has been forgotten.
Try:
#!/bin/bash
./bin/sqlite3 ./sys/xserve_sqlite.db <<!
.headers on
.mode csv
.output out.csv
select * from eS1100_sensor_results;
!
instead.
sh/bash methods
You can...
How do I hotkey directly to File Search tab in Eclipse
... box. (If there are no results, and you have a really old Eclipse version, select the Include Unbound Commands check box.)
Put the caret into the Binding text box and press the key combination you want to use:
You can either re-use the CTRL+H binding (delete the other binding in that case) or de...
Reject binary with state waiting for review (can't find reject binary button)
...
In iTunes connect, from 'My apps', select
Click your application, then
Make sure you are on the 'Versions' tab, and that the correct version is selected.
Click 'Remove this version from review' located in the info bubble.
See below
...
How to generate a create table script for an existing table in phpmyadmin?
...o view full query
There is this Hyperlink named +Options left above, There select Full Texts
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What is PostgreSQL explain telling me exactly?
...ly 1 sentence of technical content: "• EXPLAIN works on any DML not just SELECT (ie UPDATE, DELETE, and INSERT)". My biggest misunderstanding is what "startup" time means, and that's not explained anywhere in these ~30 slides.
– Mark E. Haase
Feb 19 '16 at 15...
Distinct by property of class with LINQ [duplicate]
...p:
List<Car> distinct =
cars
.GroupBy(car => car.CarCode)
.Select(g => g.First())
.ToList();
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IntelliJ show JavaDocs tooltip on mouse over
...her (section) > Show quick documentation on mouse move - delay 500 ms
Select this check box to show quick documentation for the symbol at caret. The quick documentation pop-up window appears after the specified delay.
In Editor > General > Code Completion (sub-item) > Autopopup docume...
How to add “active” class to Html.ActionLink in ASP.NET MVC
...your menu on multiple pages, it would be smart to have a way to apply that selected class automatically based on the current page rather than copy the menu multiple times and do it manually.
The easiest way is to simply use the values contained in ViewContext.RouteData, namely the Action and Contr...