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Ruby: Easiest Way to Filter Hash Keys?
...ice method which was previously only available in Rails.
Example:
> { one: 1, two: 2, three: 3 }.slice(:one, :two)
=> {:one=>1, :two=>2}
End of edit. What follows is the original answer which I guess will be useful if you're on Ruby < 2.5 without Rails, although I imagine that cas...
Changing API level Android Studio
... existent project...
Update build.gradle(Module: app) - Make sure is the one under Gradle Script and it is NOT build.gradle(Project: yourproject).
An example of build.gradle:
apply plugin: 'com.android.application'
android {
compileSdkVersion 28
buildToolsVersion "28.0.2"
defaultC...
How to map and remove nil values in Ruby
...sed, I think it probably makes sense to switch the accepted answer to this one. I'm not sure what the etiquette is here though, whether you generally give the existing accepted response a chance to update? I'd argue this is the first answer referencing the new approach in 2.7, so should become the a...
What's the difference between a catalog and a schema in a relational database?
... An
SQL-environment contains zero or more catalogs. A catalog contains
one or more schemas, but always contains a schema named
INFORMATION_SCHEMA that contains the views and domains of the
Information Schema.
Database Language SQL, (Proposed revised text of DIS 9075), p 45
From the SQL po...
How to match “any character” in regular expression?
...ny char
\. = the actual dot character
.? = .{0,1} = match any char zero or one times
.* = .{0,} = match any char zero or more times
.+ = .{1,} = match any char one or more times
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Is there a Java reflection utility to do a deep comparison of two objects?
I'm trying to write unit tests for a variety of clone() operations inside a large project and I'm wondering if there is an existing class somewhere that is capable of taking two objects of the same type, doing a deep comparison, and saying if they're identical or not?
...
Indenting #defines
...preprocessing token or in a partial comment. Each comment is replaced by
one space character. New-line characters are retained. Whether each nonempty
sequence of white-space characters other than new-line is retained or replaced by
one space character is implementation-defined.
Preprocessing...
Default parameters with C++ constructors [closed]
.... Classes in the standard use them as well, which speaks in their favor.
One thing to watch out for is if you have defaults for all but one parameter, your class can be implicitly converted from that parameter type. Check out this thread for more info.
...
Using tags to turn off caching in all browsers? [duplicate]
...of the http-equiv
declarations AND fail with the W3C validator. At most, one could have
one of each http-equiv declarations; pragma, cache-control and
expires. These are completely outdated when using modern up to date browsers.
After IE9 anyway. Chrome and Firefox specifically does not work...
How do I move a file (or folder) from one folder to another in TortoiseSVN?
I would like to move a file or folder from one place to another within the same repository without having to use Repo Browser to do it, and without creating two independent add/delete operations. Using Repo Browser works fine except that your code will be hanging in a broken state until you get any...