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How do I run only specific tests in Rspec?
...superbly documented here. See the --tag option section for details.
As of v2.6 this kind of tag can be expressed even more simply by including the configuration option treat_symbols_as_metadata_keys_with_true_values, which allows you to do:
describe "Awesome feature", :awesome do
where :awesome i...
What is copy-on-write?
...f):
return ValueProxy(self.subject)
v1 = ValueProxy(Value('foo'))
v2 = v1.clone() # shares the immutable Value object between the copies
assert v1.subject is v2.subject
v2.write('bar') # creates a new immutable Value object with the new state
assert v1.subject is not v2.subject
...
java: (String[])List.toArray() gives ClassCastException
... it can't determine what type of array to create.
use
toArray(new String[v2.size()]);
which allocates the right kind of array (String[] and of the right size)
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How to add row in JTable?
...del.addColumn("Col2");
// Append a row
model.addRow(new Object[]{"v1", "v2"});
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.gitignore exclude folder but include specific subfolder
...ọc Duy (pclouds) is trying to add this feature:
commit 506d8f1 for git v2.7.0, reverted in commit 76b620d git v2.8.0-rc0
commit 5e57f9c git v2.8.0-rc0,... reverted(!) in commit 5cee3493 git 2.8.0.
So with git 2.9+, this could have actually worked, but was ultimately reverted:
application/
!ap...
Making 'git log' ignore changes for certain paths
...6315f74 ("ls-files: add pathspec matching for submodules", 2016-10-07, Git v2.11.0-rc0 -- merge listed in batch #11) and 89a1f4aaf7 ("dir: if our pathspec might match files under a dir, recurse into it", 2019-09-17, Git v2.24.0-rc0).
Of course, do_match_pathspec() had an important advantge over matc...
Remove multiple elements from array in Javascript/jQuery
...
There's always the plain old for loop:
var valuesArr = ["v1","v2","v3","v4","v5"],
removeValFromIndex = [0,2,4];
for (var i = removeValFromIndex.length -1; i >= 0; i--)
valuesArr.splice(removeValFromIndex[i],1);
Go through removeValFromIndex in reverse order and you can...
How do you comment out code in PowerShell?
...ext after it a comment.
# This is a comment in Powershell
In PowerShell V2 <# #> can be used for block comments and more specifically for help comments.
#REQUIRES -Version 2.0
<#
.SYNOPSIS
A brief description of the function or script. This keyword can be used
only once in each...
What's the difference between ASCII and Unicode?
... That doesn't fit in 16 bits anymore.
Encoding in 16-bits was common when v2 came around, used by Microsoft and Apple operating systems for example. And language runtimes like Java. The v2 spec came up with a way to map those 1.1 million code points into 16-bits. An encoding called UTF-16, a var...
How do I detect what .NET Framework versions and service packs are installed?
...nstall
2.0 HKLM\Software\Microsoft\NET Framework Setup\NDP\v2.0.50727\Install
3.0 HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.0\Setup\InstallSuccess
3.5 HKLM\Software\Microsoft\NET Framework Setup\NDP\v3.5\Install
4.0 Client Profile HKLM\Softwa...