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Count the number occurrences of a character in a string
...string sub in the range [start, end]. Optional arguments start and end are interpreted as in slice notation.
>>> sentence = 'Mary had a little lamb'
>>> sentence.count('a')
4
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Concurrent HashSet in .NET Framework?
...n the namespace System.Collections.Concurrent. In the case, the value is pointless, so we can use a simple byte (1 byte in memory).
private ConcurrentDictionary<string, byte> _data;
This is the recommended option because the type is thread-safe and provide you the same advantages than a Has...
p vs puts in Ruby
... on a new line. Each given object
that isn’t a string or array will be converted by calling its to_s
method. If called without arguments, outputs a single newline.
let's try it on irb
# always newline in the end
>> puts # no arguments
=> nil # return nil and writes a newline
>...
Position a CSS background image x pixels from the right?
... @ValentinE that works for me too :-) I definitely saw this converted to 90% though - and I had cut and pasted this directly from chrome. unless there was a strange bug in a dev build of chrome I'm not sure why
– Simon_Weaver
Jul 29 '14 at 19:06
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jQuery scroll to element
...oView(). No use loading a ~100k library just to select an element and then convert it to regular JavaScript.
– Gavin
Jun 23 '14 at 18:59
63
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Rails 2.3-style plugins and deprecation warnings running task in Heroku
...eare gives you a nice walkthrough link (found in the page @yuri linked) to convert my simple rails 2.3 plugins to 3.2. I liked this solution because it didn't just silence the warnings, it actually fixes them.
– Jeremiah
Oct 8 '13 at 17:24
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Changing every value in a hash in Ruby
...erated over to produce an intermediate set of nested Arrays which are then converted into a new Hash. Ignoring the RAM peak usage, run time is much worse - benchmarking this versus the modify-in-place solutions in another answer show 2.5s versus 1.5s over the same number of iterations. Since Ruby ...
Android AsyncTask threads limits?
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All AsyncTasks are controlled internally by a shared (static) ThreadPoolExecutor and a LinkedBlockingQueue. When you call execute on an AsyncTask, the ThreadPoolExecutor will execute it when it is ready some time in the future.
The 'when am I ready?' beh...
Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
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You cannot. CREATE/ALTER TABLE only accept CONSTRAINTs to be added, not indexes. The fact that primary key and unique constraints are implemented in terms of an index is a side effect. To manage indexes, you have CREATE/ALTER/DROP INDEX, as you are well aware.
Why do you ha...
Remove items from one list in another
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Minor point, but this will produce an IEnumerable<car>, not a List<car>. You need to call ToList() to get a list back. In addition, I believe it should be GetSomeOtherList().Except(GetTheList()).ToList()
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