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How to swap files between windows in VIM?
...ndows", you can use the following keyboard sequence to swap the windows:
Select window A (either with mouse or with keyboard commands)
Press <c-w>y (yanking the buffer number)
Select window B
Press <c-w>pp (pasting the buffer)
Select window A
Press <c-w>pp (pasting the buffer aga...
Copy all the lines to clipboard
...
on Mac
copy selected part: visually select text(type v or V in normal
mode) and type :w !pbcopy
copy the whole file :%w !pbcopy
past from the clipboard :r !pbpaste
...
Unable to install gem - Failed to build gem native extension - cannot load such file — mkmf (LoadErr
... reinstalled like this:
rm -rf /Library/Developer/CommandLineTools
xcode-select --install
Then i ran the previous command again:
open /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg
After install the error was fixed!
...
ERROR: Error 1005: Can't create table (errno: 121)
...y used somewhere else
To check constraints use the following SQL query:
SELECT
constraint_name,
table_name
FROM
information_schema.table_constraints
WHERE
constraint_type = 'FOREIGN KEY'
AND table_schema = DATABASE()
ORDER BY
constraint_name;
Look for more information there,...
How do you maintain development code and production code? [closed]
...ready to be deployed into production at any time: the next release, with a selected set of feature branches merged in master.
dev (or integration branch, or 'next') is the one where the feature branch selected for the next release are tested together
maintenance (or hot-fix) branch is the one for th...
Import CSV to SQLite
...ables
.tables
Find your table schema
.schema tripdata
Find table data
select * from tripdata limit 10;
Count the number of rows in the table
select count (*) from tripdata;
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How to check file MIME type with javascript before upload?
...d see three remote images of different types displayed. At the top you can select a local image or data file, and the file signature and/or MIME type will be displayed.
Notice that even if an image is renamed, its true MIME type can be determined. See below.
Screenshot
// Return the first...
How can I debug a HTTP POST in Chrome?
... get list of http queries that happened, while the network console was on. Select one of them in the left
Choose "Headers" tab
Voila!
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Creating a dynamic choice field
...
@Ashok How could the CheckboxSelectMultiple widget be used in this instance? For the modelform especially.
– wasabigeek
Aug 14 '15 at 18:22
...
How can I trim leading and trailing white space?
...lti-line strings, despite \n being in the covered character class. trimws("SELECT\n blah\n FROM foo;") still contains newlines.
– Jubbles
Dec 31 '15 at 1:10
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