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Browser statistics on JavaScript disabled [closed]
...venience services. About 20k page views a day, about 300k contracts signed online a year. We tracked all customers that signed a contract online while using our non-javascript version of the site.
We recently invested a large amount of time into non-js optimization and wanted to know whether the e...
How can I view the source code for a function?
...a GitHub, R-Forge, or RForge.net), you can probably browse the source code online.
Compiled code in a base package
Certain packages are considered "base" packages. These packages ship with R and their version is locked to the version of R. Examples include base, compiler, stats, and utils. As such...
count the frequency that a value occurs in a dataframe column
...ount()
Out[37]:
a
a
a 2
b 3
s 2
[3 rows x 1 columns]
See the online docs: http://pandas.pydata.org/pandas-docs/stable/groupby.html
Also value_counts() as @DSM has commented, many ways to skin a cat here
In [38]:
df['a'].value_counts()
Out[38]:
b 3
a 2
s 2
dtype: int64
If...
Error renaming a column in MySQL
...
The standard Mysql rename statement is:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
CHANGE [COLUMN] old_col_name new_col_name column_definition
[FIRST|AFTER col_name]
for this example:
ALTER TABLE xyz CHANGE manufacurerid manufacturerid datatype(length)
Refere...
Using scp to copy a file to Amazon EC2 instance?
... use my Mac Terminal to scp a file from Downloads (phpMyAdmin I downloaded online) to my Amazon EC2 instance.
15 Answers
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Any good boolean expression simplifiers out there? [closed]
...
For a quick online tool this is really helpful: tma.main.jp/logic/index_en.html
– Lenar Hoyt
Apr 6 '17 at 0:33
a...
Should CSS always preceed Javascript?
In countless places online I have seen the recommendation to include CSS prior to JavaScript. The reasoning is generally, of this form :
...
What is the difference between JSON and Object Literal Notation?
...tation, as @Filix King suggested, I also suggest playing around with the JSONLint online JSON validator. That's how I learned that the keys of JSON objects must be strings.
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Comet and jQuery [closed]
...s for implementing comet.
There is Comet Daily and they have a comparison online. The comparison emphasizes on maturity of the different implementation. It's pretty interesting and should get you started.
Hope that helps!
...
Open Source Java Profilers [closed]
...f the more usefull views that were mentioned in several references I found online also don't seem to exist anymore in the current realease that works with eclipse 3.5. So at the moment it's basically just a huge BLOB of uselessness.
– x4u
Jan 17 '10 at 17:11
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