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How to implement a unique index on two columns in rails
I have a table and I'm trying to add a unique index on two columns. Those columns are also indexed. So my question is if I just can remove the indexes who were just for one column or if I have to use all three indexes:
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How can I filter a Django query with a list of values?
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@OmkarDeshpande No
– DylanYoung
Nov 8 '18 at 16:47
@Dy...
How can I see the current value of my $PATH variable on OS X?
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You need to use the command echo $PATH to display the PATH variable or you can just execute set or env to display all of your environment variables.
By typing $PATH you tried to run your PATH variable contents as a command name.
Bash displayed the...
How do I focus on one spec in jasmine.js?
... can run just the whole spec by this url http://localhost:8888?spec=MySpec and a the first test with http://localhost:8888?spec=MySpec+function+1
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Retrieve list of tasks in a queue in Celery
...ure is that you need to query redis for every priority of task. In python (and from the Flower project), this looks like:
PRIORITY_SEP = '\x06\x16'
DEFAULT_PRIORITY_STEPS = [0, 3, 6, 9]
def make_queue_name_for_pri(queue, pri):
"""Make a queue name for redis
Celery uses PRIORITY_SEP to se...
Xcode — what is $(SRCROOT)?
...ation where a.xcodeproj is.
It is simple to check, just put it in a field and Xcode gives you a tip
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How to let PHP to create subdomain automatically for each user?
...p though because you'll have to make sure that all subdomain requests get handled properly. This isn't terrible with Apache but might be tricky in a hosted environment.
– Mark Biek
Oct 8 '08 at 17:55
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Convert Base64 string to an image file? [duplicate]
...ata. The actual base64 data comes after that.
Just strip everything up to and including base64, (before calling base64_decode() on the data) and you'll be fine.
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Java Replacing multiple different substring in a string at once (or in the most efficient way)
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Future reader : for regex, "(" and ")" will enclose the group to search. The "%" counts as a literal in the text. If your terms don't start AND end with the "%" they will not be found. So adjust prefixes and suffixes on both parts (text + code).
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How do I disconnect all other users in tmux?
...t.
either from <prefix>:followed by detach [options] or on the command line inside tmux with tmux detach [options]
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