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How to get record created today by rails activerecord?
...ance issues when the table size grows.
Typically, if you perform lookups based on created_at column, add an index on the table in your migration file.
add_index :posts, :created_at
Now, to lookup records created today:
Rails 3/4
Post.where("created_at >= ?", Time.zone.now.beginning_of_day)...
Is SonarQube Replacement for Checkstyle, PMD, FindBugs?
...cts. The main added value, however, is that it stores the history in a database. You can then see the trend. Are you improving the code base or are you doing the opposite? Only a tool with memory can tell you that.
You should run Sonar in your CI system so that even things that take some time to ex...
Understanding the Gemfile.lock file
... a source other than the main Rubygems index (e.g., git dependencies, path-based, dependencies) have a ! which means they are "pinned" to that source2 (although one must sometimes look in the Gemfile to determine in).
RUBY VERSION (optional)
The Ruby version specified in the Gemfile, when this Gem...
R programming: How do I get Euler's number?
...epresents e^2.
This works because exp is the exponentiation function with base e.
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Gradient of n colors ranging from color 1 and color 2
...es gradients nice ( click here for an example ). I have a need to work in base and I think scales can be used there to create color gradients as well but I'm severely off the mark on how. The basic goal is generate a palette of n colors that ranges from x color to y color. The solution needs to...
AngularJS toggle class using ng-class
...
As alternate solution, based on javascript logic operator '&&' which returns the last evaluation, you can also do this like so:
<i ng-class="autoScroll && 'icon-autoscroll' || !autoScroll && 'icon-autoscroll-disabled'"&g...
How to split a string in Haskell?
...bal file below the executable hello line put a line like ` build-depends: base, split` (note two space indent). Then build using the cabal build command. Cf. haskell.org/cabal/users-guide/…
– expz
Dec 14 '19 at 18:54
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Integer to hex string in C++
...m to convert integers into strings and its special manipulators to set the base. For example like that:
std::stringstream sstream;
sstream << std::hex << my_integer;
std::string result = sstream.str();
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What is Domain Driven Design?
...tives discuss the solution they are actually discussing a shared knowledge base with shared concepts.
The lack of a shared problem domain understanding between the people who need a particular system and the people who are designing and implementing the system seems to be a core impediment to succe...
Is it safe to delete a void pointer?
...ll T,U suggests that it should be possible to have 1 non templated, void * based garbage collector implementation. But then, when the gc actually has to delete/free a pointer exactly this question arises. To make it work, you either need lambda function destructor wrappers (urgh) or you would need s...