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Fastest way to check a string contain another substring in JavaScript?
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Any reason substr() is not one of the possible solutions? I'd guess it's a lot faster than the RegEx solution in many situations. I don't know how it compares to indexOf() though (so if you left it out because it always performs worse than indexOf() th...
Git push rejected after feature branch rebase
...ce-pushing them back to remote repository is OK as long as you're the only one who works on that branch.
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What is an abstract class in PHP?
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An abstract class is a class that contains at least one abstract method, which is a method without any actual code in it, just the name and the parameters, and that has been marked as "abstract".
The purpose of this is to provide a kind of template to inherit from and to forc...
How do I switch between the header and implementation file in Xcode 4?
...e it works. Click anywhere at all on the actual code. (If you're active in one of the other many panes of Xcode, the keystroke combo has no, or different, meaning(s).)
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How to disassemble one single function using objdump?
...would suggest using gdb as the simplest approach. You can even do it as a one-liner, like:
gdb -batch -ex 'file /bin/ls' -ex 'disassemble main'
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How to fix the Hibernate “object references an unsaved transient instance - save the transient insta
...pens because you have a collection in your entity, and that collection has one or more items which are not present in the database. By specifying the above options you tell hibernate to save them to the database when saving their parent.
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Is there hard evidence of the ROI of unit testing?
...is good evidence that this is not the case. Fixing post-release bugs is exponentially more expensive than bugs found early in development (which is what TDD does). In that context, a cost of 0.01% of total development for all post-release bugs seems unlikely. (For details see Code Complete, in parti...
SQL: How to properly check if a record exists
...E unique_key = value;
The first alternative should give you no result or one result, the second count should be zero or one.
How old is the documentation you're using? Although you've read good advice, most query optimizers in recent RDBMS's optimize SELECT COUNT(*) anyway, so while there is a di...
Are duplicate keys allowed in the definition of binary search trees?
...airly trivial to implement duplicates (either as a list at the node, or in one particular direction.)
Most (that I've seen) specify left children as <= and right children as >. Practically speaking, a BST which allows either of the right or left children to be equal to the root node, will re...
How can I rename a database column in a Ruby on Rails migration?
...a column, Rails 4 generates a change method instead of up and down as mentioned in the above section. The generated change method is:
$ > rails g migration ChangeColumnName
which will create a migration file similar to:
class ChangeColumnName < ActiveRecord::Migration
def change
ren...