大约有 15,500 项符合查询结果（耗时：0.0332秒） [XML]
Determine if Python is running inside virtualenv
...at() != sys.prefix
If you only care about supported Python versions and latest virtualenv, you can replace get_base_prefix_compat() with simply sys.base_prefix.
Using the VIRTUAL_ENV environment variable is not reliable. It is set by the virtualenv activate shell script, but a virtualenv can be use...
What really happens in a try { return x; } finally { x = null; } statement?
...finally {
...
}
return tmp;
for example (using reflector):
static int Test() {
try {
return SomeNumber();
} finally {
Foo();
}
}
compiles to:
.method private hidebysig static int32 Test() cil managed
{
.maxstack 1
.locals init (
[0] int32 CS$1$0000...
Find size of object instance in bytes in c#
... Marshal.ReadInt32(type.TypeHandle.Value, 4) works for x86 and x64. I only tested struct and class types. Keep in mind that this returns the boxed size for value types. @Pavel Maybe you could update your answer.
– jnm2
Mar 1 '15 at 1:52
...
Regex to replace multiple spaces with a single space
...unning 100k string replacements.
I encourage you to do your own profiling tests with firebug, if you think performance is an issue. Humans are notoriously bad at predicting where the bottlenecks in their programs lie.
(Also, note that IE 8's developer toolbar also has a profiler built in -- it mi...
Format number to always show 2 decimal places
...ath.round will not always give accurate results due to rounding errors. I tested this with 1.005, which should round to 1.01, but it gives 1.00. Use my answer for consistent accuracy: stackoverflow.com/a/34796988/3549440.
– Nate
Jan 14 '16 at 18:39
...
How do I copy a folder from remote to local using scp? [closed]
...eate ssh aliases
Then, for example if you have this ~/.ssh/config:
Host test
User testuser
HostName test-site.com
Port 22022
Host prod
User produser
HostName production-site.com
Port 22022
you'll save yourself from password entry and simplify scp syntax like this:
scp ...
Alternate output format for psql
...ous types.
-[ RECORD 2 ]---------------
id | 19
description | XXX Test A
authority | Testing
The older "\pset format wrapped" is similar in that it tries to fit the data neatly on screen, but falls back to unaligned if the headers won't fit. Here's an example of wrapped:
id | ...
CodeIgniter: Create new helper?
...EPATH')) exit('No direct script access allowed');
if ( ! function_exists('test_method'))
{
function test_method($var = '')
{
return $var;
}
}
Save this to application/helpers/ . We shall call it "new_helper.php"
The first line exists to make sure the file cannot be include...
Process escape sequences in a string in Python
...erent manifestations on both Python 2 and 3.
>>> s = 'naïve \\t test'
>>> print(s.encode('utf-8').decode('unicode_escape'))
naïve test
Well, that's wrong.
The new recommended way to use codecs that decode text into text is to call codecs.decode directly. Does that help?
...
How to solve Operator '!=' cannot be applied to operands of type 'T' and 'T' [duplicate]
...
using System.Collections.Generic;
public class Test<T>
{
public T Value
{
get => _Value;
set
{
// operator== is undefined for generic T; EqualityComparer solves this
if (!EqualityComparer<T>.Defaul...