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How can I merge two hashes without overwritten duplicate keys in Ruby?
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If you have two hashes, options and defaults, and you want to merge defaults into options without overwriting existing keys, what you really want to do is the reverse: merge options into defaults:
options = defaults.merge(op...
How do I use the lines of a file as arguments of a command?
Say, I have a file foo.txt specifying N arguments
10 Answers
10
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How to initialize all members of an array to the same value?
I have a large array in C (not C++ if that makes a difference). I want to initialize all members of the same value.
23 ...
How can I easily convert DataReader to List? [duplicate]
...er then most hand written code as well, so do consider the “high road” if you are doing this a lot.
See "A Defense of Reflection in .NET" for one example of this.
You can then write code like
class CustomerDTO
{
[Field("id")]
public int? CustomerId;
[Field("name")]
public ...
Adding :default => true to boolean in existing Rails column
...of ActiveRecord::Migration, so you can't call it like that in the console.
If you want to add a default value for this column, create a new migration:
rails g migration add_default_value_to_show_attribute
Then in the migration created:
# That's the more generic way to change a column
def up
change...
Why java.lang.Object is not abstract? [duplicate]
...ably have been a lot less frustration around the complexities of these two if they had both been made abstract. This would require developers to figure out how they should be implementing them, making it more obvious that they should be consistent (see Effective Java). However, I'm more of the opini...
IE10 renders in IE7 mode. How to force Standards mode?
...ith a HTML5 doctype IE will still place your website in compatibility mode if it's an intranet site.
To ensure that your website always uses the latest standards mode you can either make sure Display intranet sites in Compatibly is turned off. However you have to do this on each machine local to th...
Remove excess whitespace from within a string
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Not sure exactly what you want but here are two situations:
If you are just dealing with excess whitespace on the beginning or end of the string you can use trim(), ltrim() or rtrim() to remove it.
If you are dealing with extra spaces within a string consider a preg_replace of multipl...
SQL exclude a column using SELECT * [except columnA] FROM tableA?
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I agree with everyone... but if I was going to do something like this I might do it this way:
/* Get the data into a temp table */
SELECT * INTO #TempTable
FROM YourTable
/* Drop the columns that are not needed */
ALTER TABLE #TempTable
DROP COLUMN Colu...
How to list all Git tags?
...pattern>
List tags with names that match the given pattern (or all if no pattern is given).
Typing "git tag" without arguments, also lists all tags.
More recently ("How to sort git tags?", for Git 2.0+)
git tag --sort=<type>
Sort in a specific order.
Supported type is:...