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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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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...
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...
One-liner to take some properties from object in ES 6
How one can write a function, which takes only few attributes in most-compact way in ES6?
11 Answers
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How to pull a random record using Django's ORM?
...ent on my site. On the main webpage I'd like to show some of them: newest, one that was not visited for most time, most popular one and a random one.
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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...
Signed to unsigned conversion in C - is it always safe?
...e type of the operand with signed integer type.
In your case, we have one unsigned int (u) and signed int (i). Referring to (3) above, since both operands have the same rank, your i will need to be converted to an unsigned integer.
6.3.1.3 Signed and unsigned integers
When a value w...
Is it possible to change a UIButtons background color?
This one has me stumped.
16 Answers
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