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Code Golf: Lasers
... $_.
$s="#";
$s is the symbol of whatever the beam is sitting on top of now. Since the laser emitter is to be treated like a wall, set this to be a wall to begin with.
if (tr/v<^/>v</) {
my $o;
$o .= "\n" while s/.$/$o .= $&, ""/meg;
tr,/\\,\\/, for $o, $s;
$_ = $o;
}
If t...
Change timestamps while rebasing git branch
...hen I asked this question I also wanted to change the date of that commit. Now we have --root, which makes this possible.
– tarsius
Nov 26 '15 at 1:24
3
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How to avoid null checking in Java?
... to intermediate developers tend to face at some point: they either don't know or don't trust the contracts they are participating in and defensively overcheck for nulls. Additionally, when writing their own code, they tend to rely on returning nulls to indicate something thus requiring the caller ...
Create an array with same element repeated multiple times
...always better to avoid growing arrays by appending when possible. If you know the final size, use it.
– Tom Karzes
Aug 8 '16 at 20:01
43
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Converting an array of objects to ActiveRecord::Relation
...e def self.subjects variety, scopes, etc) on this array. The only way I know to run class methods on a group of objects is to have them be an ActiveRecord::Relation. So I end up resorting to adding a to_indicators method to Array .
...
How to make PowerShell tab completion work like Bash
...
It is now possible to get PowerShell to do Bash-style completion, using PSReadline.
Check out blog post Bash-like tab completion in PowerShell.
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Find index of last occurrence of a sub-string using T-SQL
...e last occurrence of a string using SQL? I am using SQL Server 2000 right now. I basically need the functionality that the .NET System.String.LastIndexOf method provides. A little googling revealed this - Function To Retrieve Last Index - but that does not work if you pass in a "text" column ...
How to concatenate two strings in C++?
...td::string greet = s + " World"; //concatenation easy!
Easy, isn't it?
Now if you need char const * for some reason, such as when you want to pass to some function, then you can do this:
some_c_api(s.c_str(), s.size());
assuming this function is declared as:
some_c_api(char const *input, si...
How to make shallow git submodules?
...modules_file_gently failed).
Moreover, since config_from_gitmodules() now accesses the global object
store, it is necessary to protect all code paths which call the function
against concurrent access to the global object store.
Currently this only happens in builtin/grep.c::grep_submodule...
Views vs Components in Ember.js
...t.
Hope it helps.
Update
With the publication of Road to Ember 2.0 you are now encouraged to use Components instead of Views in most of the cases.
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