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How to request a random row in SQL?
How can I request a random row (or as close to truly random as is possible) in pure SQL?
28 Answers
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Add a prefix to all Flask routes
...n as a sub-part of that WSGI container (anything that speaks WSGI will do) and to set your APPLICATION_ROOT config value to your prefix:
app.config["APPLICATION_ROOT"] = "/abc/123"
@app.route("/")
def index():
return "The URL for this page is {}".format(url_for("index"))
# Will return "The UR...
Bogus foreign key constraint fail
...US" after the drop fails.
If it turns out to be the latter case, I'd dump and restore the whole server if you can.
MySQL 5.1 and above will give you the name of the table with the FK in the error message.
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Java: Integer equals vs. ==
...r values. Hence the comparison with == only works for numbers between -128 and 127.
Refer: #Immutable_Objects_.2F_Wrapper_Class_Caching
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Objective-C and Swift URL encoding
...cape the characters you want is a little more work.
Example code
iOS7 and above:
NSString *unescaped = @"http://www";
NSString *escapedString = [unescaped stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]];
NSLog(@"escapedString: %@", escapedString...
Is Python interpreted, or compiled, or both?
From my understanding:
11 Answers
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400 BAD request HTTP error code meaning?
...ules.
In the case of a REST API with a JSON payload, 400's are typically, and correctly I would say, used to indicate that the JSON is invalid in some way according to the API specification for the service.
By that logic, both the scenarios you provided should be 400's.
Imagine instead this were ...
What is a coroutine?
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Coroutines and concurrency are largely orthogonal. Coroutines are a general control structure whereby flow control is cooperatively passed between two different routines without returning.
The 'yield' statement in Python is a good exam...
What is the difference between a database and a data warehouse?
What is the difference between a database and a data warehouse?
13 Answers
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Difference between “or” and || in Ruby? [duplicate]
What's the difference between the or and || operators in Ruby? Or is it just preference?
8 Answers
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