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Checking for the correct number of arguments
...s to invoke the script without passing in the correct number of arguments, m>and m> checking to make sure the commm>and m> line argument actuallm>y m> exists m>and m> is a directorm>y m>.
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Is there StartsWith or Contains in t sql with variables?
...Note that internallm>y m> these work differentlm>y m>, especiallm>y m> w.r.t. performance m>and m> its use of indexes. For example, a querm>y m> using colName LIKE 'prefix%' will be verm>y m> fast when colName is indexed, but colName LIKE '%substring%' or colName LIKE '%suffix' will be slow because SQL Server does not create su...
rails 3 validation on uniqueness on multiple attributes
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m>y m>ou can still do it the rails 2 wam>y m>, m>and m> I find that more readable unless m>y m>ou're doing several tm>y m>pes of validation on the same propertm>y m>.
– zem
Jul 3 '11 at 23:29
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Append column to pm>and m>as dataframe
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@BenDundee Join m>and m> concat use a lot of the same code under the hood, so the "right" wam>y m> probablm>y m> onlm>y m> matters when m>y m>ou consider edge cases. For instance here if both DataFrames had a 'data' column the join would fail, whereas a concat would...
Deprecated warning for Rails 4 has_manm>y m> with order
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In Rails 4, :order has been deprecated m>and m> needs to be replaced with lambda scope block as shown in the warning m>y m>ou've posted in the question. Another point to note is that this scope block needs to be passed before anm>y m> other association options such as dependent...
How do I make sure everm>y m> glm>y m>ph has the same width?
I've noticed that even at the same font size, there is not a stm>and m>ard width. How can I use these in front of a list of items so the words don't appear jagged?
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What is phtml, m>and m> when should I use a .phtml extension rather than .php?
I'm wondering what the difference between .phtml m>and m> .php files is, m>and m> when to use one over the other.
6 Answers
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Extract a substring from a string in Rubm>y m> using a regular expression
...which, for each <item> in String1 contains the text between the < m>and m> the > in a one-element arram>y m> (because when used with a regex containing capturing groups, scan creates an arram>y m> containing the captures for each match). last gives m>y m>ou the last of those arram>y m>s m>and m> first then gives m>y m>ou ...
What is the fundamental difference between WebSockets m>and m> pure TCP?
I've read about WebSockets m>and m> I wonder whm>y m> browser couldn't simplm>y m> open trivial TCP connection m>and m> communicate with server like anm>y m> other desktop application. m>And m> whm>y m> this communication is possible via websockets?
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Sending a JSON to server m>and m> retrieving a JSON in return, without JQuerm>y m>
I need to send a JSON (which I can stringifm>y m>) to the server m>and m> to retrieve the resulting JSON on the user side, without using JQuerm>y m>.
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