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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
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Both Perl and PHP use =>. I'd guess that Ruby, being heavily inspired by Perl, borrowed the syntax from Perl :)
– Daniel Serodio
Aug 7 '17 at 19:19
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In Markdown, what is the best way to link to a fragment of a page, i.e. #some_id?
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With the PHP version of Markdown, you can also link headers to fragment identifiers within the page using a syntax like either of the following, as documented here
Header 1 {#header1}
========
## Header 2 ## {#header...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎 ...
...不需要回复的可留空~ 请描述您的问题（300字以内）： 给个鼓励也行呐~o~ 提供截图（仅截取当前可视区域...
How do I prevent node.js from crashing? try-catch doesn't work
From my experience, a php server would throw an exception to the log or to the server end, but node.js just simply crashes. Surrounding my code with a try-catch doesn't work either since everything is done asynchronously. I would like to know what does everyone else do in their production servers.
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How can prepared statements protect from SQL injection attacks?
...nd even alter it, as every SQL injection example shows it (all examples in PHP/Mysql):
$expected_data = 1;
$query = "SELECT * FROM users where id=$expected_data";
will produce a regular query
SELECT * FROM users where id=1
while this code
$spoiled_data = "1; DROP TABLE users;"
$query ...
Citing the author of a blockquote using Markdown syntax
...edia. Retrieved 23:45, November 20, 2016](https://en.wikipedia.org/w/index.php?title=Test-driven_development&oldid=750634597)
Produces the following:
Test-driven development (TDD) is a software development process that relies on the repetition of a very short development cycle: requirement...
How do I add a tool tip to a span element?
...article aided in my confusion : htmlgoodies.com/tutorials/html_401/article.php/3479661/… where it says that the tooltip works for the "text"
– Augiwan
Jan 23 '13 at 13:50
1
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What are the differences between vector and list data types in R?
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As someone who's just gotten into R, but comes from a C/Java/Ruby/PHP/Python background, here's how I think of it.
A list is really an array + a hashmap. It's a PHP associative array.
> foo = list(bar='baz')
> foo[1]
'baz'
> foo$bar
'baz'
> foo[['bar']]
'baz'
A vector is a f...
Choosing a Java Web Framework now? [closed]
...ve it a shot. I really like it, Play is a great fit between something like PHP and the heavy duty Java frameworks like Spring.
The things I like most about play are:
Very easy to get a play application off the ground, you have to go pretty far with coding and configuration to get a simple crud ap...
scala vs java, performance and memory? [closed]
...appropriate comparison web page is - shootout.alioth.debian.org/u64q/scala.php
– igouy
May 6 '11 at 15:08
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