大约有 47,000 项符合查询结果（耗时：0.0588秒） [XML]
deleting rows in numpy array
I have an array that might look like this:
6 Answers
6
...
Are Javascript arrays sparse?
That is, if I use the current time as an index into the array:
7 Answers
7
...
How are the points in CSS specificity calculated
Researching specificity I stumbled upon this blog - http://www.htmldog.com/guides/cssadvanced/specificity/
7 Answers
...
How do you match only valid roman numerals with a regular expression?
Thinking about my other problem , i decided I can't even create a regular expression that will match roman numerals (let alone a context-free grammar that will generate them)
...
How to decide font color in white or black depending on background color?
I want to show some images like this example
22 Answers
22
...
How to initialize an array's length in JavaScript?
Most of the tutorials that I've read on arrays in JavaScript (including w3schools and devguru ) suggest that you can initialize an array with a certain length by passing an integer to the Array constructor using the var test = new Array(4); syntax.
...
Which one will execute faster, if (flag==0) or if (0==flag)?
Interview question: Which one will execute faster, if (flag==0) or if (0==flag) ? Why?
16 Answers
...
How to validate an email address using a regular expression?
Over the years I have slowly developed a regular expression that validates MOST email addresses correctly, assuming they don't use an IP address as the server part.
...
Remove outline from select box in FF
Is it possible to remove the dotted line surrounding a selected item in a select element?
12 Answers
...
What do “branch”, “tag” and “trunk” mean in Subversion repositories?
I've seen these words a lot around Subversion (and I guess general repository) discussions.
I have been using SVN for my projects for the last few years, but I've never grasped the complete concept of these directories.
...