大约有 44,000 项符合查询结果（耗时：0.0417秒） [XML]
Extracting numbers from vectors of strings
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gregexpr. I hadn't tried regexpr until just now. HUGE difference. Using regexpr puts it between Andrew's and Arun's solutions (second fastest) on a 1e6 set. Perhaps also interesting, using sub in Andrew's solution does not improve the speed.
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Creating an empty list in Python
...wrong-headed.
Readability is very subjective. I prefer [], but some very knowledgable people, like Alex Martelli, prefer list() because it is pronounceable.
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Traversing text in Insert mode
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@YugalJindle: Thanks! :) I have now added info on tweaking the Command-line mode. (The approach is a bit different from Insert mode.)
– Aaron Thoma
Jan 18 '14 at 12:24
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What is the purpose of setting a key in data.table?
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Cool, thanks! Up until now, I hadn't thought about what "binary search" actually meant, nor really understood the reason why it was used instead of a hash.
– Frank
Nov 18 '13 at 22:02
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Asking the user for input until they give a valid response
.... Feel free to use them in any context, without my explicit permission or knowledge. Regarding the non-code-block segments, If you want to paste my entire answer into a "Learn Python" book you're writing, let's talk royalties ;-)
– Kevin
Jul 24 at 13:50
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IntelliJ shortcut to show a popup of methods in a class that can be searched
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On Mac OS X, IntelliJ v12 this is now Cmnd+F12
– greg7gkb
Feb 5 '13 at 19:16
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Omitting the second expression when using the if-else shorthand
...= 0) $('.woot').text('Woot!'); I use that form all the time with PHP, and now that I'm adopting Coffeescript, I use it in my Javascript as well.
– b. e. hollenbeck
Sep 14 '12 at 0:13
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How to set or change the default Java (JDK) version on OS X?
...the major version, like:
export JAVA_HOME=`/usr/libexec/java_home -v 1.8`
Now when you run java -version you will see:
java version "1.6.0_65"
Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
Add the export JAVA_HO...
Sqlite or MySql? How to decide? [closed]
...r an Athlon 1600. 1GB RAM. 5400RPM IDE disk. Redhat 7.3. He concludes: «I now believe that SQLite is appropriate for use as the primary database on websites that get up to 1 million hits per day.»
– Rutrus
Dec 27 '16 at 0:45
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What is the purpose of the -m switch?
... to explain a little terminology.
Python's primary organizational unit is known as a module. Module's come in one of two flavors: code modules and package modules. A code module is any file that contains python executable code. A package module is a directory that contains other modules (either code...