大约有 41,300 项符合查询结果（耗时：0.0475秒） [XML]
Iterate through pairs of items in a Python list [duplicate]
...ls import tee
def pairwise(iterable):
"s -> (s0,s1), (s1,s2), (s2, s3), ..."
a, b = tee(iterable)
next(b, None)
return zip(a, b)
for v, w in pairwise(a):
...
share
|
improve...
How to get the insert ID in JDBC?
... statement.setString(2, user.getPassword());
statement.setString(3, user.getEmail());
// ...
int affectedRows = statement.executeUpdate();
if (affectedRows == 0) {
throw new SQLException("Creating user failed, no rows affected.");
}
tr...
Hidden features of Ruby
...product| product.modulo(factor).zero?}
end
case number
when multiple_of(3)
puts "Multiple of 3"
when multiple_of(7)
puts "Multiple of 7"
end
share
edited Dec 8 '...
How do you delete a column by name in data.table?
...
Any of the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents
# Method 2a -- A saf...
What platforms have something other than 8-bit char?
...turned up for example in OMAP2. There are other DSPs out there with 16 and 32 bit char. I think I even heard about a 24-bit DSP, but I can't remember what, so maybe I imagined it.
Another consideration is that POSIX mandates CHAR_BIT == 8. So if you're using POSIX you can assume it. If someone late...
Is there a difference between /\s/g and /\s+/g?
... |
edited Jan 9 '15 at 15:31
answered May 11 '11 at 12:42
B...
Difference between `npm start` & `node app.js`, when starting app?
...
273
From the man page, npm start:
runs a package's "start" script, if one was provided.
If no ...
Using Razor, how do I render a Boolean to a JavaScript variable?
...
303
You may also want to try:
isFollowing: '@(Model.IsFollowing)' === '@true'
and an ever bette...
How to use 'find' to search for files created on a specific date? [closed]
...
328
As pointed out by Max, you can't, but checking files modified or accessed is not all that hard...
How do I add files and folders into GitHub repos?
...acing a problem with adding files. I have added readme.txt . Also, I have 3 other PHP files and a folder including images.
...