大约有 40,000 项符合查询结果（耗时：0.0500秒） [XML]
Can't find the 'libpq-fe.h header when trying to install pg gem
...on Rails 3.1 pre version. I like to use PostgreSQL, but the problem is installing the pg gem. It gives me the following error:
...
Encrypt & Decrypt using PyCrypto AES 256
...rt Random
from Crypto.Cipher import AES
class AESCipher(object):
def __init__(self, key):
self.bs = AES.block_size
self.key = hashlib.sha256(key.encode()).digest()
def encrypt(self, raw):
raw = self._pad(raw)
iv = Random.new().read(AES.block_size)
...
Reshaping data.frame from wide to long format
...s melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
...
JavaScript function similar to Python range()
...uple of additional defensive checks - ensure that the arguments passed are all coercible to numbers and ensure that stop is greater than start (and swap them if not).
– Russ Cam
Nov 25 '11 at 18:46
...
See changes to a specific file using git
...s, but, as far as I understood, it is directory based. This means it gives all the changes of all files on the current directory.
...
Parse email content from quoted reply
...il from any quoted reply text that it might include. I've noticed that usually email clients will put an "On such and such date so and so wrote" or prefix the lines with an angle bracket. Unfortunately, not everyone does this. Does anyone have any idea on how to programmatically detect reply text...
Extracting substrings in Go
...panic on a zero length input, wrap the truncate operation in an if
input, _ := src.ReadString('\n')
var inputFmt string
if len(input) > 0 {
inputFmt = input[:len(input)-1]
}
// Do something with inputFmt
share
...
fatal error: malformed or corrupted AST file - Xcode
... Thanks man, this worked. But can you please explain what is all this about_ I like to know why something happens, when it does. And I just had this error when I opened my project the next day, out of the blue.
– SteBra
Jul 23 '14 at 8:27
...
Custom ImageView with drop shadow
...e appropriate padding in XML:
<ImageView
android:id="@+id/image_test"
android:background="@drawable/drop_shadow"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="6px"
android:paddingTop="4px"
and...
Reactive Extensions bug on Windows Phone
...r is creating a connection to the compiler, and the debugger as well needs all vars to be strictly typed. The debugger is guessing correct, and the compiler is somehow taking ques from it. It doesnt really matter why the debugger fixes the problem, the root cause has been found.
...