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How can I declare optional function parameters in Javascript? [duplicate]
...ES5:
function myFunc(a,b) {
b = b || 0;
// b will be set either to b or to 0.
}
This works as long as all values you explicitly pass in are truthy.
Values that are not truthy as per MiniGod's comment: null, undefined, 0, false, ''
It's pretty common to see JavaScript libraries to do a bunch...
How do I parse a URL query parameters, in Javascript? [duplicate]
...
Today (2.5 years after this answer) you can safely use Array.forEach. As @ricosrealm suggests, decodeURIComponent was used in this function.
function getJsonFromUrl(url) {
if(!url) url = location.search;
var query = url.substr(1);
var result = {};
query.split("&").forEach(f...
How do I get an empty array of any size in python?
...If by "array" you actually mean a Python list, you can use
a = [0] * 10
or
a = [None] * 10
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How to get started on TDD with Ruby on Rails? [closed]
...s in college), but I am not sure how to really use them yet since I never worked on a "real" TDD project.
7 Answers
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do { … } while (0) — what is it good for? [duplicate]
I've been seeing that expression for over 10 years now. I've been trying to think what it's good for. Since I see it mostly in #defines, I assume it's good for inner scope variable declaration and for using breaks (instead of gotos.)
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ItemsControl with horizontal orientation
Do you know any controls inherited from the ItemsControl that have horizontal orientation of items?
5 Answers
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Best data type to store money values in MySQL
I want to store many records in a MySQL database. All of them contains money values. But I don't know how many digits will be inserted for each one.
Which data type do I have to use for this purpose?
VARCHAR or INT (or other numeric data types)?
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How can I open a Shell inside a Vim Window?
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Neovim and Vim 8.2 support this natively via the :ter[minal] command.
See terminal-window in the docs for details.
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iterating over each character of a String in ruby 1.8.6 (each_char)
...
I have the same problem. I usually resort to String#split:
"ABCDEFG".split("").each do |i|
puts i
end
I guess you could also implement it yourself like this:
class String
def each_char
self.split("").each { |i| yield i }
end
end
Edit: yet another ...
Why git keeps showing my changes when I switch branches (modified,added, deleted files) no matter if
...out to switch between branches First I tried not using git add and didn't work. However, I tried then using git add, but didn't fix the problem. I'm not using git commit yet.
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