大约有 25,400 项符合查询结果（耗时：0.0483秒） [XML]
How do I clear all options in a dropdown box?
...
You can use the following to clear all the elements.
var select = document.getElementById("DropList");
var length = select.options.length;
for (i = length-1; i >= 0; i--) {
select.options[i] = null;
}
...
How to force cp to overwrite without confirmation
...tly written in .bashrc, if anything else this file calls ends up calling something else which manipulates the alias for cp, you will run into this behavior.
– Jon
Mar 10 '14 at 17:42
...
How to remove line breaks (no characters!) from the string?
...the rest of the web for an answer to my problem and ended up finding the same insufficient "solutions" over and over. Anyhow, here it goes:
...
How to check whether a variable is a class or not?
...tance, use inspect.isclass(type(Myclass()))
– michaelmeyer
Apr 18 '13 at 16:21
8
Better than what...
How to format a float in javascript?
...rt" where it doesn't accepts string values hence toFixed didn't worked for me, Math.round solved my issue, thanks
– Swapnil Chincholkar
Jun 23 '15 at 13:11
4
...
Should I use != or for not equal in T-SQL?
...
Technically they function the same if you’re using SQL Server AKA T-SQL. If you're using it in stored procedures there is no performance reason to use one over the other. It then comes down to personal preference. I prefer to use <> as it is ANSI ...
PHP - Check if two arrays are equal
I'd like to check if two arrays are equal. I mean: same size, same index, same values. How can I do that?
15 Answers
...
Difference between @import and link in CSS
I'm learning some CSS to tweak my project template. I come to this problem and didn't find a clear answer on the web. Is there a difference between using @import or link in CSS?
...
How to disable a link using only CSS?
...
The answer is already in the comments of the question. For more visibility, I am copying this solution here:
.not-active {
pointer-events: none;
cursor: default;
text-decoration: none;
color: black;
}
<a href="link.html" class="not-act...
How to empty a Heroku database
...nd). But it also loads your database schema and your seeds after the error message.
You can do this with pretty much any rake command, but there are exceptions. For example, db:reset doesn't work via heroku run rake. You have to use pg:reset instead.
More information can be found in Heroku's docum...