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How do I check whether a checkbox is checked in jQuery?
...e of the element.
Given your existing code, you could therefore do this:
if(document.getElementById('isAgeSelected').checked) {
$("#txtAge").show();
} else {
$("#txtAge").hide();
}
However, there's a much prettier way to do this, using toggle:
$('#isAgeSelected').click(function() {
...
In Objective-C, what is the equivalent of Java's “instanceof” keyword?
...bject ) is assignable (cast-able) to a variable of another type (e.g. SpecifiedType ). In Java, I can write:
3 Answers
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Rails has_and_belongs_to_many migration
...rom the docs:
There is also a generator which will produce join tables if JoinTable
is part of the name:
Your migration file (note the :id => false; it's what prevents the creation of a primary key):
Rails 3
class CreateRestaurantsUsers < ActiveRecord::Migration
def self.up
c...
How to check if an object is an array?
...rite a function that either accepts a list of strings, or a single string. If it's a string, then I want to convert it to an array with just the one item so I can loop over it without fear of an error.
...
Create numpy matrix filled with NaNs
...
I prefer the .fill() method, but the difference in speeds reduces to practically nothing as the arrays get larger.
– naught101
Mar 24 '14 at 11:13
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Bash tool to get nth line from a file
...en using head -n | tail -1 which does the trick, but I've been wondering if there's a Bash tool that specifically extracts a line (or a range of lines) from a file.
...
java get file size efficiently
...per Iteration: 660.0
For runs = 5 and iterations = 50 the picture draws different.
LENGTH sum: 39496, per Iteration: 157.984
CHANNEL sum: 74261, per Iteration: 297.044
URL sum: 95534, per Iteration: 382.136
File must be caching the calls to the filesystem, while channels and URL have some ove...
How to apply a function to two columns of Pandas dataframe
...sing apply on the dataframe, which I am calling with axis = 1.
Note the difference is that instead of trying to pass two values to the function f, rewrite the function to accept a pandas Series object, and then index the Series to get the values needed.
In [49]: df
Out[49]:
0 ...
Finding diff between current and last version
Using Git, how can you find the difference between the current and the last version?
12 Answers
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public friend swap member function
In the beautiful answer to the copy-and-swap-idiom there is a piece of code I need a bit of help:
2 Answers
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