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Difference between map, applymap and apply methods in Pandas
...other design considerations, and Wes McKinney decided to come up with two different methods.
– marillion
Nov 5 '13 at 21:58
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Creating temporary files in bash
...owever, some systems (busybox ash, for one) limit this randomness more significantly than others
By the way, safe creation of temporary files is important for more than just shell scripting. That's why python has tempfile, perl has File::Temp, ruby has Tempfile, etc…
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Extracting specific columns from a data frame
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Using the dplyr package, if your data.frame is called df1:
library(dplyr)
df1 %>%
select(A, B, E)
This can also be written without the %>% pipe as:
select(df1, A, B, E)
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How to add a downloaded .box file to Vagrant?
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what if i use vagrant box add my-box ./path/to/mybox.box ?
– Rakib
Sep 15 '15 at 10:53
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Difference between document.addEventListener and window.addEventListener?
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The document and window are different objects and they have some different events. Using addEventListener() on them listens to events destined for a different object. You should use the one that actually has the event you are interested in.
For exampl...
How do I replace text inside a div element?
... @Aeyoun The OP implied they were already using Prototype, so if that's the case it makes sense to take advantage of it.
– John Topley
Apr 8 '13 at 7:35
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What is cardinality in MySQL?
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@Drew, ;) not if comparing lexemes.
– Pacerier
Sep 17 '15 at 7:28
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How do you parse and process HTML/XML in PHP?
...tent, structure and style of documents.
DOM is capable of parsing and modifying real world (broken) HTML and it can do XPath queries. It is based on libxml.
It takes some time to get productive with DOM, but that time is well worth it IMO. Since DOM is a language-agnostic interface, you'll find i...
Capturing “Delete” Keypress with jQuery
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$('html').keyup(function(e){
if(e.keyCode == 46) {
alert('Delete key released');
}
});
Source: javascript char codes key codes from www.cambiaresearch.com
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What is the command to truncate a SQL Server log file?
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if I remember well... in query analyzer or equivalent:
BACKUP LOG databasename WITH TRUNCATE_ONLY
DBCC SHRINKFILE ( databasename_Log, 1)
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