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Java regex capturing groups indexes
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Capturing and grouping
Capturing group (pattern) creates a group that has capturing property.
A related one that you might often see (and use) is (?:pattern), which creates a group without capturing property, hence named non-capturi...
Find the version of an installed npm package
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On mac and linux it's nice to add " | grep module_name", to filter the desired module version. Especially when running globally with -g. For example: "npm list -g | grep express" to get the installed express version.
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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...mbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9.
See http://www.gnu.org/software/coreutils/manual/html_node/sort-invocatio...
What do the different readystates in XMLHttpRequest mean, and how can I use them?
XMLHttpRequest has 5 readyState s, and I only use 1 of them (the last one, 4 ).
5 Answers
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How to format numbers as currency string?
...ce in JavaScript. I'd like a function which takes a float as an argument and returns a string formatted like this:
66 A...
Truncate number to two decimal places without rounding
...obably know, weird precision things can happen with floating point values (and on the other side of the spectrum, if the number happens to be 15, sounds like the OP wants 15.00).
– T.J. Crowder
Nov 15 '10 at 17:38
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Selecting a row of pandas series/dataframe by integer index
I am curious as to why df[2] is not supported, while df.ix[2] and df[2:3] both work.
6 Answers
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Hadoop “Unable to load native-hadoop library for your platform” warning
...p.so.1.0.0 was actually compiled on 32 bit.
Anyway, it's just a warning, and won't impact Hadoop's functionalities.
Here is the way if you do want to eliminate this warning, download the source code of Hadoop and recompile libhadoop.so.1.0.0 on 64bit system, then replace the 32bit one.
Steps o...
grant remote access of MySQL database from any IP address
I am aware of this command:
21 Answers
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How do I read / convert an InputStream into a String in Java?
...ou have a java.io.InputStream object, how should you process that object and produce a String ?
59 Answers
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