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What's the easy way to auto create non existing dir in ansible
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Right now, this is the only way
- name: Ensures {{project_root}}/conf dir exists
file: path={{project_root}}/conf state=directory
- name: Copy file
template:
src: code.conf.j2
dest: "{{project_root}}/conf/code.conf"
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Performing Breadth First Search recursively
...vels, the results will be same as a BFS.
public void PrintLevelNodes(Tree root, int level) {
if (root != null) {
if (level == 0) {
Console.Write(root.Data);
return;
}
PrintLevelNodes(root.Left, level - 1);
PrintLevelNodes(root.Right, level...
Why are joins bad when considering scalability?
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...except in MySQL, which seems to have performance problems with large numbers of joins regardless of how your indexes look. Or at least it has in the past.
– Powerlord
Apr 12 '10 at 17:53
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Where does npm install packages?
...y. It will then typically be found in /usr/local/lib/node_modules (Use npm root -g to check where.)
npm install pm2 - pm2 will be installed locally. It will then typically be found in the local directory in /node_modules
sh...
Add a reference column migration in Rails 4
... Active Record only supports single column foreign keys and currently only mysql, mysql2 and PostgreSQL adapters are supported. Don't try this with other adapters like sqlite3, etc. Refer to Rails Guides: Foreign Keys for your reference.
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How do I get the APK of an installed app without root access?
I'm trying to extract the APK file of an installed Android app WITHOUT root permissions.
11 Answers
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What are file descriptors, explained in simple terms?
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COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
sleep 14726 root cwd DIR 8,1 4096 1201140 /home/x
sleep 14726 root rtd DIR 8,1 4096 2 /
sleep 14726 root txt REG 8,1 35000 786587 /bin/sleep
sleep 14726 root mem REG 8,1 11864720 118650...
How is null + true a string?
...for the operation operator op(x, y) is determined. The set consists of the union of the candidate operators provided by X and the candidate operators provided by Y, each determined using the rules of §7.3.5. If X and Y are the same type, or if X and Y are derived from a common base type, then share...
How to use count and group by at the same select statement
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needs alias otherwise wouldnt work in mysql. select count(*) from( ) agr
– amas
Jan 9 '14 at 6:54
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How can I detect if the user is on localhost in PHP?
...n.
I think what you remember with PHPMyAdmin is something different: Many MySQL Servers are configured so that they can only be accessed from localhost for security reasons.
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