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Get index of array element faster than O(n)
Given I have a HUGE array, and a value from it. I want to get index of the value in array. Is there any other way, rather then call Array#index to get it? The problem comes from the need of keeping really huge array and calling Array#index enormous amount of times.
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Relationship between hashCode and equals method in Java [duplicate]
I read in many places saying while override equals method in Java, should override hashCode method too, otherwise it is "violating the contract".
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How can I add new array elements at the beginning of an array in Javascript?
I have a need to add or prepend elements at the beginning of an array.
12 Answers
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Adding a new SQL column with a default value
I am looking for the syntax to add a column to a MySQL database with a default value of 0
10 Answers
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Can a local variable's memory be accessed outside its scope?
I have the following code.
20 Answers
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Open a new tab in gnome-terminal using command line [closed]
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How to use ssh agent forwarding with “vagrant ssh”?
Rather than create a new SSH key pair on a vagrant box, I would like to re-use the key pair I have on my host machine, using agent forwarding . I've tried setting config.ssh.forward_agent to TRUE in the Vagrantfile, then rebooted the VM, and tried using:
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angularjs: ng-src equivalent for background-image:url(…)
In angularjs you have the tag ng-src which has the purpose that you won't receive an error for an invalid url before angularjs gets to evaluate the variables placed in between {{ and }} .
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How to format strings in Java
Primitive question, but how do I format strings like this:
8 Answers
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Count Rows in Doctrine QueryBuilder
I'm using Doctrine's QueryBuilder to build a query, and I want to get the total count of results from the query.
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