大约有 13,700 项符合查询结果（耗时：0.0282秒） [XML]
Disable all table constraints in Oracle
...m SQL*Plus or put this thing into a package or procedure. The join to USER_TABLES is there to avoid view constraints.
It's unlikely that you really want to disable all constraints (including NOT NULL, primary keys, etc). You should think about putting constraint_type in the WHERE clause.
BEGIN
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How do I merge a git tag onto a branch
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You mean this?
git checkout destination_branch
git merge tag_name
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How do I use NSTimer?
...ewController
double timerInterval = 1.0f;
- (NSTimer *) timer {
if (!_timer) {
_timer = [NSTimer timerWithTimeInterval:timerInterval target:self selector:@selector(onTick:) userInfo:nil repeats:YES];
}
return _timer;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSRu...
Java 8: performance of Streams vs Collections
...fects on your results. So, I increased your task 10 times
int max = 10_000_000;
and ran your benchmark. My results:
Collections: Elapsed time: 8592999350 ns (8.592999 seconds)
Streams: Elapsed time: 2068208058 ns (2.068208 seconds)
Parallel streams: Elapsed time: 7186967071 ns (7...
Where in an Eclipse workspace is the list of projects stored?
...d up fixing these files in place with (D:->F:) sfk replace -pat -binary _5552492F2F66696C653A2F443A2F_5552492F2F66696C653A2F463A2F_ -dir .metadata\.plugins\org.eclipse.core.resources\.projects -file .location
– mgaert
Oct 2 '14 at 12:10
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Formatting code snippets for blogging on Blogger [closed]
...code" class="brush: erlang"><![CDATA[
-module(trim).
-export([string_strip_right/1, reverse_tl_reverse/1, bench/0]).
bench() -> [nbench(N) || N <- [1,1000,1000000]].
nbench(N) -> {N, bench(["a" || _ <- lists:seq(1,N)])}.
bench(String) ->
{{string_strip_right,
lists:s...
Pandas aggregate count distinct
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How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "use...
Python: using a recursive algorithm as a generator
...],string[:i]+string[i+1:] pairs. Then it would be: for letter,rest in first_letter_options(string): for perm in getPermuations(rest): yield letter+perm
– Thomas Andrews
Oct 14 '16 at 19:04
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Resharper- Find all unused classes
...hing like the following :
public class IoC
{
private WindsorContainer _container;
private IoC()
{
_container = new WindsorContainer();
}
public static void RegisterFromAssembly(Assembly assembly, string classEndsWith, LifeTime lifeTime)
{
var lifestyle = C...
Generating a random password in php
...assword using rand is a really bad idea. It's not a secure PRNG. (and no mt_rand isn't better either)
– CodesInChaos
Oct 31 '13 at 16:56
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