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Rails migration for change column
We have script/generate migration add_fieldname_to_tablename fieldname:datatype syntax for adding new columns to a model.
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Installing Python packages from local file system folder to virtualenv with pip
...find-links=." and "--no-index", where the key in glueing together a python-script inside my utility-package, that first removes the old-version-package from site-packages then installs a tar.gz'ed package from a subdir of the utility-package-folder (did not knew about --find-links=.), then creates t...
Running shell command and capturing the output
...oing so raises security concerns. If you're doing anything more than light scripting, you might be better off calling each process separately, and passing the output from each as an input to the next, via
run(cmd, [stdout=etc...], input=other_output)
Or
Popen(cmd, [stdout=etc...]).communicate(ot...
How to return only the Date from a SQL Server DateTime datatype
...sequent queries, so throw out execution #1 if you like.
Here is full test script and performance results that prove DateDiff is substantially faster than converting to varchar.
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Doing something before program exit
...ion or something that will be executed before your program quits? I have a script that will be constantly running in the background, and I need it to save some data to a file before it exits. Is there a standard way of doing this?
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How to automatically install Emacs packages by specifying a list of package names?
... package)))
packages))
;; make sure to have downloaded archive description.
;; Or use package-archive-contents as suggested by Nicolas Dudebout
(or (file-exists-p package-user-dir)
(package-refresh-contents))
(ensure-package-installed 'iedit 'magit) ; --> (nil nil) if iedit and ma...
Read a text file using Node.js?
... two, the zeroth item being the "node" interpreter and the first being the script that node is currently running, items after that were passed on the command line. Once you've pulled a filename from argv then you can use the filesystem functions to read the file and do whatever you want with its co...
Call a Server-side Method on a Resource in a RESTful Way
...est doesn’t need to
include a representation at all.
Following the description above we can see that bark can be modeled as a subresource of a dog (since a bark is contained within a dog, that is, a bark is "barked" by a dog).
From that reasoning we already got:
The method is POST
The resou...
PostgreSQL create table if not exists
In a MySQL script you can write:
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What does it mean when an HTTP request returns status code 0?
What does it mean when JavaScript network calls such as fetch or XMLHttpRequest, or any other type of HTTP network request, fail with an HTTP status code of 0?
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