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Initialize class fields in constructor or at declaration?
...declaration (null, false, 0, 0.0…).
Prefer initialization in declaration if you don't have a constructor parameter that changes the value of the field.
If the value of the field changes because of a constructor parameter put the initialization in the constructors.
Be consistent in your practice (t...
How do I set $PATH such that `ssh user@host command` works?
...ult Ubuntu ~/.bashrc file. It usually starts with something like this:
# If not running interactively, don't do anything
[ -z "$PS1" ] && return
You want to put anything for non-interactive shells before this line.
...
In-memory size of a Python structure
... """Recursively finds size of objects"""
size = sys.getsizeof(obj)
if seen is None:
seen = set()
obj_id = id(obj)
if obj_id in seen:
return 0
# Important mark as seen *before* entering recursion to gracefully handle
# self-referential objects
seen.add(obj_...
Ruby on Rails: How can I revert a migration with rake db:migrate?
...> is the version number of your migration file you want to revert.
eg. if you want to revert a migration with file name 3846656238_create_users.rb
rake db:migrate:down VERSION=3846656238
share
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Getting the class name from a static method in Java
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If you're going to hard-code in knowledge of MyClass like that, then you might as well just do String name = "MyClass"; !
– John Topley
Jun 1 '09 at 20:45
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How to determine if one array contains all elements of another array
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If using the OP's definition of a1 and a2, and a1 "containing all elements of" a2, I think this should be _ (a1 & a2).size == a2.size _ since a2 is the smaller array, which should have all elements included in the larger ...
Will console.log reduce JavaScript execution performance?
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If you are going to have this on a public site or something, anyone with little knowledge on using the developer tools can read your debug messages. Depending on what you are logging, this may not be a desirable behavior.
On...
CSS Input Type Selectors - Possible to have an “or” or “not” syntax?
If they exist in programming),
2 Answers
2
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Remove last character from C++ string
...ur example is confusing, I think that the essence of the question is to modify the original string, in your example you're not modifying the original string, because in your example the original string is called "myString" which gives to the confusion, in the question it is "st". Your code should be...
How to enable Ad Hoc Distributed Queries
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If ad hoc updates to system catalog is "not supported", or if you get a "Msg 5808" then you will need to configure with override like this:
EXEC sp_configure 'show advanced options', 1
RECONFIGURE with override
GO
EXEC sp_co...