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Ruby: kind_of? vs. instance_of? vs. is_a?
...the class of obj, or if class is one of the superclasses of obj or modules included in obj.
If that is unclear, it would be nice to know what exactly is unclear, so that the documentation can be improved.
When should I use which?
Never. Use polymorphism instead.
Why are there so many of them?
I...
Which iOS app version/build number(s) MUST be incremented upon App Store release?
Version/build fields for an iOS app include:
10 Answers
10
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How to search for file names in Visual Studio?
... Unfortunately that doesn't limit the search to filenames, it also includes symbols
– Xavier Poinas
Oct 17 '16 at 15:57
11
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Check if a string has white space
...ge it is much easier, plus you can take advantage of early return:
// Use includes method on string
function hasWhiteSpace(s) {
const whitespaceChars = [' ', '\t', '\n'];
return whitespaceChars.some(char => s.includes(char));
}
// Use character comparison
function hasWhiteSpace(s) {
const...
How do I reference an existing branch from an issue in GitHub?
...ned in another answer, GitHub automatically makes links to various things, including other GH repositories, but not to branches within those repositories. When I want to do this, I manually make the link like this:
[a link to a branch](/_user_/_project_/tree/_branch_)
Where _user_, _project_, an...
Why are preprocessor macros evil and what are the alternatives?
...ves in some header file that someone else wrote? [and even more fun if you included that macro before the include - you'd be drowning in strange errors that makes absolutely no sense when you look at the code itself.
Replacement: Well there isn't so much as a replacement as a "rule" - only use up...
Launch Bootstrap Modal on page load
... Another important note: a lot of people post their javascript includes at the end of the body. in which case, the onload function must be included at the end, after the includes.
– Adam Joseph Looze
Mar 1 '15 at 19:19
...
sqlite3-ruby install error on Ubuntu
... just need a -- in there.
sudo gem install sqlite3-ruby -- --with-sqlite3-include=/usr/include
That specifies that the option is not to gem directly, but the specific gem.
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Dynamically add script tag with src that may include document.write
I want to dynamically include a script tag in a webpage however I have no control of it's src so src="source.js" may look like this.
...
For loop for HTMLCollection elements
...sName("events");
for (let item of list) {
console.log(item.id);
}
To include older browsers (including things like IE), this will work everywhere:
var list= document.getElementsByClassName("events");
for (var i = 0; i < list.length; i++) {
console.log(list[i].id); //second console outp...