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Difference between EXISTS and IN in SQL?
...nted as a nested join, while the join query can be nested, merged, hashed, etc - whatever's quickest.
– Keith
Aug 5 '15 at 19:43
2
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Does Eclipse have line-wrap
...g.
As if that's not enough, you can also set printer margins, tab size, etc, in Preferences>General>Editors>Text Editors where I set the Displayed Tab Width to 4 and Print Margin Column to 120 or more.
You can also check the Show Print Margin box to get a faint vertical line at the p...
Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
...c.rindex(/:\d+(:in `.*')?$/)
file = $`
if /\A\((.*)\)/ =~ file # eval, etc.
raise LoadError, "require_relative is called in #{$1}"
end
absolute = File.expand_path(relative_feature, File.dirname(file))
require absolute
end
It basically just uses what Theo answered, but so you can stil...
How to keep environment variables when using sudo
...
Notice that you should never edit the etc/sudoers directly. Instead, use the visudo command, which syntax-checks your edits before overwriting the sudoers file. That way, you don't lock yourself out if you make a mistake while editing.
– Hen...
Loop through files in a folder using VBA?
...can change its argument to return different type of files (hidden, system, etc.) - see MS documentation : docs.microsoft.com/en-us/office/vba/language/reference/…
– Vincent
Apr 14 at 12:47
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How do I know if a generator is empty from the start?
...# Then iterate over the sequence:
for element in mysequence:
# etc.
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Objective-C: Property / instance variable in category
... pattern, you can simply add more macros to also support signed int, BOOL, etc...
Limitations
All macros are using OBJC_ASSOCIATION_RETAIN_NONATOMIC by default.
IDEs like App Code do currently not recognize the setter's name when refactoring the property's name. You would need to rename it by you...
Slow Requests on Local Flask Server
...Chrome displayed the expected screen, but everything else hung (curl, ffx, etc) until I either reloaded or closed the Chrome tab, at which point everything else that was waiting around returned a result.
My best guess is that Chrome was trying to keep the session open and Flask was blocking the sub...
NUnit Test Run Order
...asily insert tests if necessary, so maybe 010_first_test, 020_second_test, etc.
– Les
Feb 16 '12 at 23:41
85
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Postgres: clear entire database before re-creating / re-populating from bash script
...em. (This will not drop the whole database, just each table/sequence/index/etc. before recreating them.)
The above two would look something like this:
pg_dump -U username --clean | pg_restore -U username
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