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Java inner class and static nested class
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From the Java Tutorial:
Nested classes are divided into two categories: static and non-static. Nested classes that are declared static are simply called static nested classes. Non-static nested classes are called inner classes.
Static nested classes are accessed using the enclosing...
How to replace an entire line in a text file by line number
...script and had no problems:
#Create temporary file with new line in place
cat /dir/file | sed -e "s/the_original_line/the_new_line/" > /dir/temp_file
#Copy the new file over the original file
mv /dir/temp_file /dir/file
This doesn't go by line number, but you can easily switch to a line number...
read.csv warning 'EOF within quoted string' prevents complete reading of file
...Archaeological Inference and Inductive Confirmation\t" "Sound and Sense in Cath Almaine\t" "Oak Galls Preserved by the Eruption of Mount Vesuvius in A.D. 79_ and Their Probable Use\t" "The Arts Four Thousand Years Ago\t" ...
## $ title : chr "Bruce D. Smith\t" "Tomás Ó Cathasaigh\t" "Hira...
Does Python support short-circuiting?
...tion to determine if something is executed or not. A simple function that accepts an argument, prints a message and returns the input, unchanged.
>>> def fun(i):
... print "executed"
... return i
...
One can observe the Python's short-circuiting behavior of and, or operators in...
How do I spool to a CSV formatted file using SQLPLUS?
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This would be a lot less tedious than typing out all of the fields and concatenating them with the commas. You could follow up with a simple sed script to remove whitespace that appears before a comma, if you wanted.
Something like this might work...(my sed skills are very rusty, so this will lik...
MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...查看该文件信息，具体信息如下：
[root@localhost mongodb]# cat students.dat
{ "_id" : { "$oid" : "5031143350f2481577ea81e5" }, "classid" : 1, "age" : 20, "name" : "kobe" }
{ "_id" : { "$oid" : "5031144a50f2481577ea81e6" }, "classid" : 1, "age" : 23, "name" : "nash" }
{ "_id" : { "...
How do you add swap to an EC2 instance?
...', bs means 'block size' and count is the number of blocks you want to allocate… you can read the man page of the command for more info: linux.die.net/man/1/dd
– Fábio Batista
May 19 '14 at 22:23
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“405 method not allowed” in IIS7.5 for “PUT” method
...d not allowed. Note that I'm using IIS Express and the error somehow only occurs on PUT but works for GET, POST AND DELETE.
– Thierry
Jul 15 '19 at 21:33
add a comment
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How to make link look like a button?
...me if I apply it to a tag directly (a {display: block ...}), which is not acceptable. Do you have any idea why class attribute inside a tag won't work? :( I'm using Firefox 27. I also tried a.button {...} and it doesn't work either.
– just_a_girl
Feb 26 '14 at ...
Convert object string to JSON
...imple code in the link below :
http://msdn.microsoft.com/es-es/library/ie/cc836466%28v=vs.94%29.aspx
var jsontext = '{"firstname":"Jesper","surname":"Aaberg","phone":["555-0100","555-0120"]}';
var contact = JSON.parse(jsontext);
and reverse
var str = JSON.stringify(arr);
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