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How to get the seconds since epoch from the time + date output of gmtime()?
...the process keep running, even if I change the system locale, the mktime() called by the web server API still use the old timezone to generate the time object. I have to switch to gmtime() and manually apply the gmt offset.
– Jkm
Aug 31 '16 at 1:41
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How do I convert a Ruby class name to a underscore-delimited symbol?
How can I programmatically turn a class name, FooBar , into a symbol, :foo_bar ? e.g. something like this, but that handles camel case properly?
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Ruby Regexp group matching, assign variables on 1 line
...ou can use String#match which will return a MatchData object, you can then call #captures to return an Array of captures. Something like this:
#!/usr/bin/env ruby
string = "RyanOnRails: This is a test"
one, two, three = string.match(/(^.*)(:)(.*)/i).captures
p one #=> "RyanOnRails"
p two #...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
...bility maps to -target release and -source release in javac. Source is basically the source language level and target is the level of the bytecode that is generated.
More details can be found in the javac the cross compilation section.
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What is an SDL renderer?
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So what you when you call SDL_RenderPresent is take that renderer with all it's setting and textures that were uploaded to it and make it render this informations on the Window that it's tied to?
– prcastro
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python numpy ValueError: operands could not be broadcast together with shapes
...nded in one or more dimensions to make them compatible. This operation are called broadcasting. Dimensions where size is 1 or which are missing can be used in broadcasting.
In the example above the dimensions are incompatible, because:
97 2
2 1
Here there are conflicting numbers in the firs...
How do I force Postgres to use a particular index?
...on "index hinting" feature found in many databases, PostgreSQL doesn't provide such a feature. This was a conscious decision made by the PostgreSQL team. A good overview of why and what you can do instead can be found here. The reasons are basically that it's a performance hack that tends to cause m...
How to rename items in values() in Django?
... -1 because .values(supports__through_tables) and this hack doesn't (incidentally probably the most obvious use case for wanting to rename the ValuesQuerySet dict keys)
– wim
Aug 21 '14 at 13:12
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How to use RSpec's should_raise with any kind of exception?
...expectation to pass without even executing the method you are intending to call. Instead consider providing a specific error class or message. This message can be supressed by setting: RSpec::Expectations.configuration.warn_about_potential_false_positives = false.
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django: BooleanField, how to set the default value to true?
..._field = models.BooleanField(default=True)
Finally, if you want to dynamically choose at runtime whether or not your field will be selected by default, you can use the initial parameter to the form when you initialize it:
form = MyForm(initial={'my_field':True})
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