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Regular expression for matching latitude/longitude coordinates?
...[1-9]?\d))(\.\d+)?)$
Matches
+90.0, -127.554334
45, 180
-90, -180
-90.000, -180.0000
+90, +180
47.1231231, 179.99999999
Doesn't Match
-90., -180.
+90.1, -100.111
-91, 123.456
045, 180
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Reading a huge .csv file
... 100mb to 1.6gb). I can do this (very slowly) for the files with under 300,000 rows, but once I go above that I get memory errors. My code looks like this:
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Sort hash by key, return hash in Ruby
...of tuples to convert them to a k=>v structure (hash).
hsh ={"a" => 1000, "b" => 10, "c" => 200000}
Hash[hsh.sort_by{|k,v| v}] #or hsh.sort_by{|k,v| v}.to_h
There is a similar question in "How to sort a Ruby Hash by number value?".
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What is the easiest way to parse an INI file in Java?
...rses the ini files with ease. Also it uses no esoteric dependencies to 10,000 other jar files, as one of the design goals was to use only the standard Java API
This is an example on how the library is used:
Ini ini = new Ini(new File(filename));
java.util.prefs.Preferences prefs = new IniPreferen...
Leading zeros for Int in Swift
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String(format: "%03d", myInt) will give you "000", "001", ... , "099", "100".
– vacawama
Jul 15 '15 at 9:56
1
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Is there a vr (vertical rule) in html?
... easy to do using CSS, however. Ex:
<div style="border-left:1px solid #000;height:500px"></div>
Note that you need to specify a height or fill the container with content.
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SQL query to select dates between two dates
...tetime without a specified time segment will have a value of date 00:00:00.000, if you want to be sure you get all the dates in your range, you must either supply the time for your ending date or increase your ending date and use <.
select Date,TotalAllowance from Calculation where EmployeeId=1 ...
How to delete the top 1000 rows from a table using Sql Server 2008?
I have a table in SQL Server. I would like to delete the top 1000 rows from it. However, I tried this, but I instead of just deleting the top 1000 rows it deleted all the rows in the table.
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How do I break a string across more than one line of code in JavaScript?
...ing value of a string literal is to use an escape sequence such as \n or \u000A.
So using string concatenation is the better choice.
Update 2015-01-05 String literals in ECMAScript5 allow the mentioned syntax:
A line terminator character cannot appear in a string literal, except as p...
What is the difference between \r and \n?
...language-sensitive. In C# and Java, for example, \n always means Unicode U+000A, which is defined as line feed. In C and C++ the water is somewhat muddier, as the meaning is platform-specific. See comments for details.
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