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Package doesn't exist error in intelliJ
...ing all modules:
open File > Project Structure...,
go to Modules tab,
select all modules and press the remove button,
then removing all remaining Maven modules from Maven tool window:
select all modules,
right click on them,
press Remove projects,
and then adding them again in Project to...
How do I search within an array of hashes by hash values in ruby?
...
You're looking for Enumerable#select (also called find_all):
@fathers.select {|father| father["age"] > 35 }
# => [ { "age" => 40, "father" => "Bob" },
# { "age" => 50, "father" => "Batman" } ]
Per the documentation, it "returns a...
Text Progress Bar in the Console [closed]
I wrote a simple console app to upload and download files from an FTP server using the ftplib.
31 Answers
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jQuery: Selecting by class and input type
I would like to select a set of elements that are both of a certain input type (say, a checkbox) and have a certain class using jQuery. However, when I try the following:
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What is the difference between is_a and instanceof?
...There is a excellent blog post about what experienced developers can learn from beginners. Hopefully you can see it at the top right. Beware of premature optimisation! Only solve timing problems after they've become problems! If the performance is acceptable as it is, don't spend time changing it!
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How can I make the Android emulator show the soft keyboard?
... time I try to do it, it resets itself! I click New... Hardware property, select Keyboard Support, change the value to 'no', click edit/create, but when I edit it again or get info: Hardware Keyboard = yes! Ha! I can't express how sublime I find the Android emulator.
– blahd...
How to “undelete” a deleted folder in Subversion / TortoiseSVN?
... revision there your folder still exists, then right-click that folder and select "Copy to..." and enter the path there you want the folder to be re-created (probably the same path that is already in the text box).
share
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How do I put an already-running process under nohup?
...your shell) This allows you to see all the jobs that this shell started." (from [quantprinciple.com/invest/index.php/docs/tipsandtricks/unix/…)
– Dr. Jan-Philip Gehrcke
Mar 17 '11 at 13:46
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Oracle 分组后取每组第一条数据 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...据Oracle 分组后取每组第一条数据的SQL如下，亲测有效：SELECT * FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T field1, T Oracle 分组后取每组第一条数据的SQL如下，亲测有效：
SELECT *
FROM (SELECT ROW_NUMBER() OVER(PARTITION BY T.field1, T.field2 ORDER...
Mongod complains that there is no /data/db folder
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chown: id -u: Invalid argument
I found out this apparently occurred from using the wrong type of quotation marks (should have been backquotes) Ubuntu Forums
Instead I just used
sudo chown $USER /data/db
as an alternative and now mongod has the permissions it needs.
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