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What is the difference between single-quoted and double-quoted strings in PHP?
...ion is that to display a literal single quote, you can escape it with a back slash \', and to display a back slash, you can escape it with another backslash \\ (So yes, even single quoted strings are parsed).
Double quote strings will display a host of escaped characters (including some regexes), an...
Read environment variables in Node.js
...c 10 '16 at 19:24
Michał Perłakowski
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answered Feb 2 '11 at 3:14
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Select all contents of textbox when it receives focus (Vanilla JS or jQuery)
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John SheehanJohn Sheehan
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Android multiple email attachments using Intent
I've been working on Android program to send email with an attachment (image file, audio file, etc) using Intent with ACTION_SEND . The program is working when email has a single attachment. I used Intent.putExtra(android.content.Intent.EXTRA_STREAM, uri) to attach the designated image file to th...
How to set a JavaScript breakpoint from code in Chrome?
I want to force the Chrome debugger to break on a line via code , or else using some sort of comment tag such as something like console.break() .
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Downloading MySQL dump from command line
I am moving away from Linode because I don't have the Linux sysadmin skills necessary; before I complete the transition to a more noob-friendly service, I need to download the contents of a MySQL database. Is there a way I can do this from the command line?
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How to construct a relative path in Java from two absolute paths (or URLs)?
... not use URI? It has a relativize method which does all the necessary checks for you.
String path = "/var/data/stuff/xyz.dat";
String base = "/var/data";
String relative = new File(base).toURI().relativize(new File(path).toURI()).getPath();
// relative == "stuff/xyz.dat"
Please note that for fil...
List of lists changes reflected across sublists unexpectedly
...: [[42, 1, 1, 1], [42, 1, 1, 1], [42, 1, 1, 1]]
To fix it, you need to make sure that you create a new list at each position. One way to do it is
[[1]*4 for _ in range(3)]
which will reevaluate [1]*4 each time instead of evaluating it once and making 3 references to 1 list.
You might wonder ...
Displaying the Indian currency symbol on a website
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The HTML entity for the Indian rupee sign is ₹ (₹). Use it like you would © for the copyright sign. For more, read Wikipedia's article on the rupee sign.
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Is there a /dev/null on Windows?
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I think you want NUL, at least within a command prompt or batch files.
For example:
type c:\autoexec.bat > NUL
doesn't create a file.
(I believe the same is true if you try to create a file programmatically, but I haven't t...