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PHP mkdir: Permission denied problem
...te permissions on the directory.
Here's what you do in Ubuntu
Make sure all files are owned by the Apache group and user. In Ubuntu it is the www-data group and user
chown -R www-data:www-data /path/to/webserver/www
Next enabled all members of the www-data group to read and write files
chmod -R...
Heroku Postgres - terminate hung query (idle in transaction)
...
You can install the heroku-pg-extras add-on and run the following command to get the PID:
heroku pg:locks --app <your-app>
Then just do:
heroku pg:kill <pid> --app <your-app>
NOTE: --force option can be used to issue pg_terminate_...
Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...个变量，其值是一个空格，那么我们可以这样来：
nullstring :=
space := $(nullstring) # end of the line
nullstring 是一个Empty变量，其中什么也没有，而我们的space的值是一个空格。因为在操作符的右边是很难描述一个空格的，这里采...
How to implement an abstract class in ruby?
I know there is no concept of abstract class in ruby. But if at all it needs to be implemented, how to go about it? I tried something like...
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How to add an integer to each element in a list?
...ition, but if you have a more complex function that you needed to apply to all the elements then map may be a good fit.
In your example it would be:
>>> map(lambda x:x+1, [1,2,3])
[2,3,4]
share
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Counting inversions in an array
...m to do the following: Given array A[1... n] , for every i < j , find all inversion pairs such that A[i] > A[j] . I'm using merge sort and copying array A to array B and then comparing the two arrays, but I'm having a difficult time seeing how I can use this to find the number of inversions...
Is there a “goto” statement in bash?
...atement in bash ? I know It is considered bad practice, but I need specifically "goto".
12 Answers
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How to find the installed pandas version
...trouble with some of pandas functionalities. How do I check what is my installation version?
6 Answers
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How can I access the MySQL command line with XAMPP for Windows?
...s-file=# Only read default options from the given file #.
--defaults-extra-file=# Read this file after the global files are read.
-?, --help Display this help and exit.
-I, --help Synonym for -?
--abort-source-on-error
Abort 'source filename' operations in case of erro...
Number of elements in a javascript object
...
Although JS implementations might keep track of such a value internally, there's no standard way to get it.
In the past, Mozilla's Javascript variant exposed the non-standard __count__, but it has been removed with version 1.8.5.
For cross-browser scripting you're stuck with explicitly ite...