大约有 15,630 项符合查询结果（耗时：0.0311秒） [XML]
Is there a simple, elegant way to define singletons? [duplicate]
...
class Foo:
def __init__(self):
print 'Foo created'
f = Foo() # Error, this isn't how you get the instance of a singleton
f = Foo.instance() # Good. Being explicit is in line with the Python Zen
g = Foo.instance() # Returns already created instance
print f is g # True
And here's the c...
Generating random strings with T-SQL
...should differ by first character, but it does not because of an off-by-one error: SUBSTRING(..., 0, ...) returns empty string for index 0, and for 529126 this 'hides' the first character generated. Fix is to compute @dice = rand(@seed) * len(@specials)+1 to make the indexes 1 based.
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Can Json.NET serialize / deserialize to / from a stream?
...rge enough, and you're stuck in a 32-bit process, you may still get memory errors with this code
– PandaWood
Oct 21 '16 at 3:03
1
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Is there a method to generate a UUID with go language
...e, 16)
_, err := rand.Read(b)
if err != nil {
fmt.Println("Error: ", err)
return
}
uuid = fmt.Sprintf("%X-%X-%X-%X-%X", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
return
}
share
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Maintain/Save/Restore scroll position when returning to a ListView
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there was an error in your answer. The method is called setSelection
– Janusz
Jun 10 '10 at 14:10
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What data type to use for money in Java? [closed]
...ally microdollars, actually, as then if you do e.g $10/3 then the rounding error (3333.3 => 3333.0) doesn't affect the final value as much (in this case it doesn't impact the real value at all, although it's dangerous to assume that it never will). This is especially important if you're doing a ...
How to change node.js's console font color?
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And octal escapes don't appear to work: error: octal escape sequences "\033[31mServer ready @ #{app.get('port')}\033[91m" are not allowed
– jcollum
Feb 13 '14 at 19:28
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D Programming Language in the real world? [closed]
...s, manual memory management, etc, everywhere in your code, because they're error prone, and assumes that you don't want to sift through multi-page template error messages when you screw up just to use resizable arrays.
Unlike Java and other bondage-and-discipline languages, D assumes that sometim...
Makefile, header dependencies
...on without build dirs see [codereview].
CXX = clang++
CXX_FLAGS = -Wfatal-errors -Wall -Wextra -Wpedantic -Wconversion -Wshadow
# Final binary
BIN = mybin
# Put all auto generated stuff to this build dir.
BUILD_DIR = ./build
# List of all .cpp source files.
CPP = main.cpp $(wildcard dir1/*.cpp) $...
How to check if a file is a valid image file?
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I've seen verify raise SyntaxError for corrupt png files
– Carl
Nov 20 '15 at 3:41
1
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