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How to concatenate string variables in Bash
In PHP, strings are concatenated together as follows:
30 Answers
30
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How do I hide javascript code in a webpage?
...s say you are worried about exposing a secret. Let's say you put it into a PHP file and call it via Ajax. Then anyone can call that PHP file and find the secret. There is probably a way to protect secrets using PHP, and I've been struggling to find it. Generate a random number and require that all a...
Initializing a static std::map in C++
...I think of all the horrendous template code that must be behind it. Good example!
– Greg Hewgill
Sep 26 '08 at 10:22
34
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Change directory command in Docker?
...You can run a script, or a more complex parameter to the RUN. Here is an example from a Dockerfile I've downloaded to look at previously:
RUN cd /opt && unzip treeio.zip && mv treeio-master treeio && \
rm -f treeio.zip && cd treeio && pip install -r requi...
Getting a better understanding of callback functions in JavaScript
...tanding the best implementation to do that. I'm looking for a very basic example, like this:
8 Answers
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Facebook Android Generate Key Hash
...e required SHA1 Key
Then goto
http://tomeko.net/online_tools/hex_to_base64.php
and paste your sha1 key
and finally you will get Required HashKey which you can use it to apply on facebook.
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What's the fastest way to loop through an array in JavaScript?
...te = (title, time, n) =>
`<div>` +
`<span>${title}  </span>` +
`<span style="width:${3+n/2}%"> ${Number(time.toFixed(3))}msec</span>` +
`</div>`;
var strRes = times.map( t => template(...t) ).join("\n") +
`&...
Is there a vim command to relocate a tab?
How can I change the position / order of my current tab in Vim ? For example, if I want to reposition my current tab to be the first tab?
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How to create a directory if it doesn't exist using Node.js?
...n is in an operation that happens once (and only once), at startup. For example, require actually uses readFileSync to load modules.
Even then, you still have to be careful because lots of synchronous I/O can unnecessarily slow down your server's startup time.
Instead, you should use the asynchron...
How to remove the lines which appear on file B from another file A?
...
If the files are sorted (they are in your example):
comm -23 file1 file2
-23 suppresses the lines that are in both files, or only in file 2. If the files are not sorted, pipe them through sort first...
See the man page here
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