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Get current directory name (without full path) in a Bash script
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No need for basename, and especially no need for a subshell running pwd (which adds an extra, and expensive, fork operation); the shell can do this internally using parameter expansion:
result=${PWD##*/} # to assign to a variable
printf '%s\n' "$...
How to generate a random alpha-numeric string?
...er that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated).
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Error “library not found for” after putting application in AdMob
...at it needs to escape any double quotes " with a '\'. Make sure you remove all the \’s - it should look like this -
I was able to duplicate the error, by doing prefixing my path with multiple '\'.
share
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How to copy files between two nodes using ansible
...le form machine A to machine B whereas my control machine from where i run all my ansible tasks is machine C(local machine)
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Is there an R function for finding the index of an element in a vector?
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@John : that's all true, but that is not what the OP asked. The OP asked, starting from a long vector, to find the first match of elements given in another one. And for completeness, I added that if you are interested in all indices, you'll...
Load and execute external js file in node.js with access to local variables?
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Just do a require('./yourfile.js');
Declare all the variables that you want outside access as global variables.
So instead of
var a = "hello" it will be
GLOBAL.a="hello" or just
a = "hello"
This is obviously bad. You don't want to be polluting the global scope.
Ins...
Markdown and image alignment
...de a class name like so (PHP Markdown Extra):
{.callout}
or, alternatively (Maruku, Kramdown, Python Markdown):
{: .callout}
Then, of course, you can use a stylesheet the proper way:
.callout {
float: right;
}
If yours supports this syn...
Merge multiple lines (two blocks) in Vim
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You can certainly do all this with a single copy/paste (using block-mode selection), but I'm guessing that's not what you want.
If you want to do this with just Ex commands
:5,8del | let l=split(@") | 1,4s/$/\=remove(l,0)/
will transform
wor...
What is the advantage of using heredoc in PHP? [closed]
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The heredoc syntax is much cleaner to me and it is really useful for multi-line strings and avoiding quoting issues. Back in the day I used to use them to construct SQL queries:
$sql = <<<SQL
select *
from $tablename
where id in [$order_ids_list]
and product_na...
Check if an apt-get package is installed and then install it if it's not on Linux
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To check if packagename was installed, type:
dpkg -s <packagename>
You can also use dpkg-query that has a neater output for your purpose, and accepts wild cards, too.
dpkg-query -l <packagename>
To find what package owns the command, try:
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