大约有 1,300 项符合查询结果（耗时：0.0165秒） [XML]
Linux command: How to 'find' only text files?
...re if also other types could report 'empty'.
– Timo Kähkönen
Mar 8 '13 at 0:26
"Why is it unhandy?" - "outputs unnee...
What is the fastest way to create a checksum for large files in C#
...m).Replace("-", String.Empty).ToLower();
}
And I tested with a file of 29½ GB in size, the results were
10.000: 369,24s
100.000: 362,55s
1.000.000: 361,53s
10.000.000: 434,15s
100.000.000: 435,15s
1.000.000.000: 434,31s
And 376,22s when using the original, none buffered code.
I am running an ...
How do I create a Linked List Data Structure in Java? [closed]
...ed Aug 15 '08 at 16:11
Juha SyrjäläJuha Syrjälä
30k3030 gold badges121121 silver badges171171 bronze badges
...
Output data from all columns in a dataframe in pandas [duplicate]
I have a csv file with the name params.csv . I opened up ipython qtconsole and created a pandas dataframe using:
7 Ans...
Binary Data in JSON String. Something better than Base64
The JSON format natively doesn't support binary data. The binary data has to be escaped so that it can be placed into a string element (i.e. zero or more Unicode chars in double quotes using backslash escapes) in JSON.
...
How to create a file in memory for user to download, but not through server?
... a download prompt. Otherwise, it will probably open in the browser.
For CSV, you can use:
<a href="data:application/octet-stream,field1%2Cfield2%0Afoo%2Cbar%0Agoo%2Cgai%0A">CSV Octet</a>
Try the jsFiddle demo.
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Only read selected columns
....g.: fread("data.txt", select = c(1:7), data.table = FALSE)
2) With read.csv.sql from the sqldf-package:
Another alternative is the read.csv.sql function from the sqldf package:
library(sqldf)
dat <- read.csv.sql("data.txt",
sql = "select Year,Jan,Feb,Mar,Apr,May,Jun from ...
How can I interrupt a ServerSocket accept() method?
...red Jun 6 '10 at 10:28
Juha SyrjäläJuha Syrjälä
30k3030 gold badges121121 silver badges171171 bronze badges
...
source of historical stock data [closed]
...IS NO LONGER ACCURATE AS THE YAHOO FEED HAS CEASED TO EXIST
Using Yahoo's CSV approach above you can also get historical data!
You can reverse engineer the following example:
http://ichart.finance.yahoo.com/table.csv?s=YHOO&d=0&e=28&f=2010&g=d&a=3&b=12&c=1996&ignore...
How to convert a List into a comma separated string without iterating List explicitly [dupli
...
With Java 8:
String csv = String.join(",", ids);
With Java 7-, there is a dirty way (note: it works only if you don't insert strings which contain ", " in your list) - obviously, List#toString will perform a loop to create idList but it does n...