大约有 47,000 项符合查询结果（耗时：0.0637秒） [XML]
(Built-in) way in JavaScript to check if a string is a valid number
...ter-intuitive. +num converts empty strings or strings with spaces to zero, and isNaN() assumes the same:
+'' // 0
+' ' // 0
isNaN('') // false
isNaN(' ') // false
But parseInt() does not agree:
parseInt('') // NaN
parseInt(' ') // NaN
...
When to use self over $this?
In PHP 5, what is the difference between using self and $this ?
23 Answers
23
...
How to get Locale from its String representation in Java?
...programmatic name" as returned by Locale's toString() method? An obvious and ugly solution would be parsing the String and then constructing a new Locale instance according to that, but maybe there's a better way / ready solution for that?
...
jQuery set checkbox checked
...
Taking all of the proposed answers and applying them to my situation - trying to check or uncheck a checkbox based on a retrieved value of true (should check the box) or false (should not check the box) - I tried all of the above and found that using .prop("ch...
Maximum Length of Command Line String
In Windows, what is the maximum length of a command line string? Meaning if I specify a program which takes arguments on the command line such as abc.exe -name=abc
...
How to check if a float value is a whole number
...ke into account that in Python 2, 1/3 is 0 (floor division for integer operands!), and that floating point arithmetic can be imprecise (a float is an approximation using binary fractions, not a precise real number). But adjusting your loop a little this gives:
>>> for n in range(12000, -1,...
how to draw directed graphs using networkx in python?
... to map on to a graph. In the below, I want to use Arrow to go from A to D and probably have the edge colored too in (red or something).
...
How to loop over directories in Linux?
I am writing a script in bash on Linux and need to go through all subdirectory names in a given directory. How can I loop through these directories (and skip regular files)?
...
Traverse a list in reverse order in Python
So I can start from len(collection) and end in collection[0] .
26 Answers
26
...
What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
...
Well considering there's no overhead difference between a varchar(30) and a varchar(100) if you're only storing 20 characters in each, err on the side of caution and just make it 50.
share
|
im...