大约有 45,012 项符合查询结果（耗时：0.0752秒） [XML]
How should I validate an e-mail address?
...e an e-mail to just send a confirmation e-mail to the address provided and it it bounces then it's not valid.
If you want to perform some basic checks you could just check that it's in the form *@*
If you have some business logic specific validation then you could perform that using a regex, e.g. ...
How to import a single table in to mysql database using command line
... using command line, but now my pain area is how to import a single table with its data to the existing database using command line.
...
Grepping a huge file (80GB) any way to speed it up?
...
Here are a few options:
1) Prefix your grep command with LC_ALL=C to use the C locale instead of UTF-8.
2) Use fgrep because you're searching for a fixed string, not a regular expression.
3) Remove the -i option, if you don't need it.
So your command becomes:
LC_ALL=C fgrep...
How to determine one year from now in Javascript
I'm trying to get one year from now's date, and it's not working.
7 Answers
7
...
In JPA 2, using a CriteriaQuery, how to count results
I am rather new to JPA 2 and it's CriteriaBuilder / CriteriaQuery API:
7 Answers
7
...
How to check if array is empty or does not exist? [duplicate]
...
You want to do the check for undefined first. If you do it the other way round, it will generate an error if the array is undefined.
if (array === undefined || array.length == 0) {
// array empty or does not exist
}
Update
This answer is getting a fair amount of attention, so...
applicationWillEnterForeground vs. applicationDidBecomeActive, applicationWillResignActive vs. appli
...when an application is waking up from being in the background and you want it to prep it to be active?
7 Answers
...
Iterate over the lines of a string
...
Here are three possibilities:
foo = """
this is
a multi-line string.
"""
def f1(foo=foo): return iter(foo.splitlines())
def f2(foo=foo):
retval = ''
for char in foo:
retval += char if not char == '\n' else ''
if char == ...
How do we control web page caching, across all browsers?
... Cache-Control is per the HTTP 1.1 spec for clients and proxies (and implicitly required by some clients next to Expires). The Pragma is per the HTTP 1.0 spec for prehistoric clients. The Expires is per the HTTP 1.0 and 1.1 specs for clients and proxies. In HTTP 1.1, the Cache-Control takes preceden...
How to search for a string in text files?
I want to check if a string is in a text file. If it is, do X. If it's not, do Y. However, this code always returns True for some reason. Can anyone see what is wrong?
...