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How to add column if not exists on PostgreSQL?
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This approach (EXCEPTION) is a bit more general, and can be employed for tasks which have no IF NOT EXISTS syntax - for example ALTER TABLE ... ADD CONSTRAINT.
– Tomasz Gandor
Apr 16 '19 at 9:51
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How to set a Django model field's default value to a function call / callable (e.g., a date relative
...ls.Model):
my_date = models.DateTimeField(default=get_default_my_date)
More information in the @simanas answer below
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How to write DataFrame to postgres table?
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Escape double quotes in parameter
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198
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How to determine CPU and memory consumption from inside a process?
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Using .otf fonts on web browsers
... to support nearly every browser that is still out there (not necessary anymore IMHO), you should add some more font-types like:
@font-face {
font-family: GraublauWeb;
src: url("webfont.eot"); /* IE9 Compat Modes */
src: url("webfont.eot?#iefix") format("embedded-opentype"), /* IE6-IE8 *...
Using semicolon (;) vs plus (+) with exec in find
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@Rmano: I've seen find (and xargs) on Solaris emit more arguments than could be consumed. The xargs (and find) in GNU's findutils` seem to behave more sensibly, but not everyone uses GNU.
– Johnsyweb
Nov 24 '13 at 1:55
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browser sessionStorage. share between tabs?
... as first script in the page. When my JS file grew too larger, say 1000 or more lines, it suddenly stopped working and removed my cookies and specific localStorage data also. I am not sure this is a reliable or cross-browser solution that could be relied upon. So, rewrote all logic to solve the issu...
How/When does Execute Shell mark a build as failure in Jenkins?
...r). It will email committers when their fixes fixed the failing build. And more and more. Jenkins archiving the artifacts also makes them available, per build, straight off Jenkins. While not as crucial as the SVN checkout, this is once again an integral part of what makes it Jenkins. Same with depl...