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Double vs single quotes
I'm really new to Ruby and I'm trying to understand if there's a specific time when I should use "" vs '' .
8 Answers
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Smart way to truncate long strings
...more sophisticated solution/library for truncating strings with JavaScript and putting an ellipsis on the end, than the obvious one:
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Inserting HTML into a div
...mple, I have a case in which server technologies (php etc) are disallowed, and I want to re-use about 20 lines of html inside the same page.
– Jennifer Michelle
Jan 30 '14 at 4:47
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Split array into chunks
...his answer):
More efficient method:
// refresh page if experimenting and you already defined Array.prototype.chunk
Object.defineProperty(Array.prototype, 'chunk', {
value: function(chunkSize) {
var R = [];
for (var i = 0; i < this.length; i += chunkSize)
R.push(this.s...
Send attachments with PHP Mail()?
...cript from here: http://github.com/PHPMailer/PHPMailer
Extract the archive and copy the script's folder to a convenient place in your project.
Include the main script file -- require_once('path/to/file/class.phpmailer.php');
Now, sending emails with attachments goes from being insanely difficult t...
Multiline strings in JSON
I'm writing some data files in JSON format and would like to have some really long string values split over multiple lines. Using python's JSON module I get a whole lot of errors, whether I use \ or \n as an escape.
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'printf' vs. 'cout' in C++
What is the difference between printf() and cout in C++?
16 Answers
16
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
I want to pause input in a shell script, and prompt the user for choices.
The standard Yes , No , or Cancel type question.
How do I accomplish this in a typical bash prompt?
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PostgreSQL: Difference between text and varchar (character varying)
What's the difference between the text data type and the character varying ( varchar ) data types?
9 Answers
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pyplot scatter plot marker size
...ases it by a factor of 4). To see this consider the following two examples and the output they produce.
# doubling the width of markers
x = [0,2,4,6,8,10]
y = [0]*len(x)
s = [20*4**n for n in range(len(x))]
plt.scatter(x,y,s=s)
plt.show()
gives
Notice how the size increases very quickly. If in...