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jQuery Validate - require at least one field in a group to be filled
...lidate some forms. On one form, I need to ensure that the user fills in at least one of a group of fields. I think I've got a pretty good solution, and wanted to share it. Please suggest any improvements you can think of.
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Using the HTML5 “required” attribute for a group of checkboxes?
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However, using jQuery, you can easily control if a checkbox group has at least one checked element.
Consider the following DOM snippet:
<div class="checkbox-group required">
<input type="checkbox" name="checkbox_name[]">
<input type="checkbox" name="checkbox_name[]">
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How to check if element has any children in Javascript?
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A couple of ways:
if (element.firstChild) {
// It has at least one
}
or the hasChildNodes() function:
if (element.hasChildNodes()) {
// It has at least one
}
or the length property of childNodes:
if (element.childNodes.length > 0) { // Or just `if (element.childNodes.l...
Passing an array to a query using a WHERE clause
...pression to place inside the () from our array. Note that there must be at least one value inside the parenthesis or MySQL will return an error; this equates to making sure that our input array has at least one value. To help prevent against SQL injection attacks, first generate a ? for each input i...
End of support for python 2.7?
...d was that patchlevel releases for Python 2.7 will probably be made for at least 6 years.
So, maybe 2016, probably later.
Edit: Pushed back to 2020. See the revision to PEP 373, linked to in other answers.
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Facebook database design?
... to run queries like this use a graph database of some flavor. there is at least 69 people that have never worked at any kind of scale or do not know how to do math at scale.
– user177800
Jan 11 '16 at 0:17
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How to remove old Docker containers
...will remove:
- all stopped containers
- all volumes not used by at least one container
- all images without at least one container associated to them
Are you sure you want to continue? [y/N] y
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How does one remove an image in Docker?
...l containers. I think that removing a running container might not work, at least I remember I had problems with this. I might be wrong her... I have checked the man page and it supports my hypothesis: "-f, --force=true|false Force removal of running container. The default is false."
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What are valid values for the id attribute in HTML?
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HTML 5 is even more permissive, saying only that an id must contain at least one character and may not contain any space characters.
The id attribute is case sensitive in XHTML.
As a purely practical matter, you may want to avoid certain characters. Periods, colons and '#' have special meaning...
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
What is the regex to make sure that a given string contains at least one character from each of the following categories.
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