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How can I add new array elements at the beginning of an array in Javascript?
...push - add an element to the beginning/end of an array
shift/pop - remove and return the first/last element of an array
A simple diagram...
unshift -> array <- push
shift <- array -> pop
and chart:
add remove start end
push X X
pop ...
Ruby Regexp group matching, assign variables on 1 line
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Beware that if no matches are found, match returns nil and you get a NilError. If you are in Rails, I suggest you to change: one, two, three = string.match(/(^.*)(:)(.*)/i).captures into: one, two, three = string.match(/(^.*)(:)(.*)/i).try(:captures)
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Rails: Custom text for rails form_for label
...
Just go to the above link and type in the method you are looking for in the search box. label is listed under ActionView::Helpers::FormBuilder and ActionView::Helpers::FormHelper. ActionView::Helpers::FormBuilder is the one we are interested in, but t...
error: passing xxx as 'this' argument of xxx discards qualifiers
... {
return name;
}
This is necessary because now you can call getId() and getName() on const objects as:
void f(const StudentT & s)
{
cout << s.getId(); //now okay, but error with your versions
cout << s.getName(); //now okay, but error with your versions
}
As a s...
Converting Secret Key into a String and Vice Versa
I am generating a key and need to store it in DB, so I convert it into a String, but to get back the key from the String. What are the possible ways of accomplishing this?
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Using PassportJS, how does one pass additional form fields to the local authentication strategy?
I'm using passportJS and I'm wanting to supply more than just req.body.username and req.body.password to my authentication strategy (passport-local).
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jQuery selectors on custom data attributes using HTML5
...col="1"][data-row="2"]') Will this select the div where data-col equals 1 and data-row equals 2, or will it select on either of those?
– Luuuud
Oct 11 '12 at 13:53
10
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MySQL: how to get the difference between two timestamps in seconds
...ence between two timestamps in seconds, or would I need to do that in PHP? And if so, how would I go about doing that?
4 An...
What's the difference between a catalog and a schema in a relational database?
... other things--all of the various schemas (external, conceptual, internal) and all of the corresponding mappings (external/conceptual, conceptual/internal) are kept.
In other words, the catalog contains detailed information (sometimes called descriptor information or metadata) regarding the va...
RegEx backreferences in IntelliJ
I want to use IntelliJ's find-and-replace feature to perform the following transformation:
4 Answers
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