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Can I have multiple Xcode versions installed?
Is it possible to have more than one version of Xcode installed at the same time?
12 Answers
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How to assign the output of a Bash command to a variable? [duplicate]
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Try:
pwd=`pwd`
or
pwd=$(pwd)
Notice no spaces after the equals sign.
Also as Mr. Weiss points out; you don't assign to $pwd, you assign to pwd.
share
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How to search all loaded scripts in Chrome Developer Tools?
In Firebug, you can search some text and it will look for it in all scripts loaded on a page. Can the same be done in Chrome Developer tools while debugging client script? I tried it, but it seems to search only in the script I have open, and not the rest that are on the page.
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Use of Initializers vs Constructors in Java
...g win.
I find "if (someStaticVar == null) // do stuff" to be messy and error prone. If it is initialized statically and declared final, then you avoid the possibility of it being null.
However, I'm confused when you say:
static/instance initializers can be used to set the value of "final"
s...
ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111)
...you are using ubuntu, you have to use the following steps to avoid this error(if there is no replication enabled):
run the command vim /etc/mysql/my.cnf
comment bind-address = 127.0.0.1 using the # symbol
restart your mysql server once.
Update
In Step 1, if you cannot find bind-address in the m...
How to find out where a function is defined?
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This still works well for me. I'd like to target where the function is being fired, instead of from where it's being defined.
– EHerman
May 7 '14 at 17:06
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Difference between a virtual function and a pure virtual function [duplicate]
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A virtual function makes its class a polymorphic base class. Derived classes can override virtual functions. Virtual functions called through base class pointers/references will be resolved at run-time. That is, the dynamic type of the object is used instead of its s...
Array initialization syntax when not in a declaration
... to ask the Java designers. There might be some subtle grammatical reason for the restriction. Note that some of the array creation / initialization constructs were not in Java 1.0, and (IIRC) were added in Java 1.1.
But "why" is immaterial ... the restriction is there, and you have to live with it...
Why '&&' and not '&'?
... most cases, && and || are preferred over & and | because the former are short-circuited, meaning that the evaluation is canceled as soon as the result is clear.
Example:
if(CanExecute() && CanSave())
{
}
If CanExecute returns false, the complete expression will be false, r...
How many database indexes is too many?
I'm working on a project with a rather large Oracle database (although my question applies equally well to other databases). We have a web interface which allows users to search on almost any possible combination of fields.
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