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How do I change permissions for a folder and all of its subfolders and files in one step in Linux?
... @BenoitDuffez if your goal is to also remove the executable bit from files, you can combine directives, like "a-x+rX" to remove "x" from everything and then set "r" to everything and "x" to directories only.
– nunks
Dec 19 '16 at 19:59
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What is the “->” PHP operator called and how do you say it when reading code out loud? [closed]
...omes, what do you call -> in C/C++ where it has different functionality from the actual dot operator?
– user229044♦
Sep 17 '10 at 16:53
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How to delete a cookie?
...Here is an implementation of a delete cookie function with unicode support from Mozilla:
function removeItem(sKey, sPath, sDomain) {
document.cookie = encodeURIComponent(sKey) +
"=; expires=Thu, 01 Jan 1970 00:00:00 GMT" +
(sDomain ? "; domain=" + sDomain :...
How to return an empty ActiveRecord relation?
...ils 4
In Rails 4, a chainable ActiveRecord::NullRelation will be returned from calls like Post.none.
Neither it, nor chained methods, will generate queries to the database.
According to the comments:
The returned ActiveRecord::NullRelation inherits from
Relation and implements the Null Obje...
What's the best free C++ profiler for Windows? [closed]
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If you're using a Windows binary from the gcc stack, this is a great choice - AMD CodeAnalyst doesn't recognize gcc symbols on Windows, but very sleepy does!
– Mike
Feb 12 '12 at 1:48
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How to override to_json in Rails?
... the one you have encountered. The creation of the json should be separate from the rendering of the json.
Now, anytime to_json is called on an object, as_json is invoked to create the data structure, and then that hash is encoded as a JSON string using ActiveSupport::json.encode. This happens for ...
Getting View's coordinates relative to the root layout
... if that works.
It should recursively just add the top and left positions from each parent container.
You could also implement it with a Point if you wanted.
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Choosing between std::map and std::unordered_map [duplicate]
...ook). This also manifests in other indirect ways like: (1) Start iterating from the iterator returned by find(), or (2) existence of member functions like lower_bound().
Also, I think there is some difference in the worst case search complexity.
For map, it is O( lg N )
For unordered_map, it is O...
Using CSS :before and :after pseudo-elements with inline CSS?
...ties that are inherited by default will be inherited by :before and :after from the generating element, whereas pseudo-class styles just don't apply at all. In your case, for example, if you place text-align: justify in an inline style attribute for a td element, it will be inherited by td:after. Th...
How to prevent Browser cache for php site
...ricer (a Linux distro known for "going fast" by being excessively compiled from source and architecture-tuned) I'd clock a stat call. Without filesystem cache, 16ns, tops? With cache, reliably < 8ns. Nanoseconds. And on my system MD5 can process 754 MiB/s without blinking. (openssl speed md5...