大约有 20,000 项符合查询结果（耗时：0.0332秒） [XML]
Ruby combining an array into one string
...y solution:
@arr = ['<p>Hello World</p>', '<p>This is a test</p>']
@arr.reduce(:+)
=> <p>Hello World</p><p>This is a test</p>
share
|
improve thi...
Does a UNIQUE constraint automatically create an INDEX on the field(s)?
... you should not worry about them until you actually run into them.
As for testing index usage you should first fill your table with some data to make optimizer think it's actually worth to use that index.
share
|
...
Writing outputs to log file and console
...o got the
exec: 1: not found
error. This is what works best for me (confirmed to work in zsh also):
#!/bin/bash
LOG_FILE=/tmp/both.log
exec > >(tee ${LOG_FILE}) 2>&1
echo "this is stdout"
chmmm 77 /makeError
The file /tmp/both.log afterwards contains
this is stdout
chmmm comm...
In javascript, is an empty string always false as a boolean?
...
@Bruno, You can perform the same test with NaN and undefined. They are not false but they are falsy. Which is what was asked.
– Joseph
Feb 25 '16 at 23:52
...
How can I tell IntelliJ's “Find in Files” to ignore generated files?
...of getting the same result without needing to configure a custom scope.
I tested this in IntelliJ Ultimate 14.1.4. I have no idea how it behaves in other versions, but I suspect most of v14 at least will behave the same.
sh...
PostgreSQL return result set as JSON array?
...
or combine json_agg with a cast:
SELECT json_agg(t)::jsonb FROM t
My testing suggests that aggregating them into an array first is a little faster. I suspect that this is because the cast has to parse the entire JSON result.
9.2
9.2 does not have the json_agg or to_json functions, so you nee...
Is Java's assertEquals method reliable?
... seems that String.equals() is a better approach. Well, I'm doing JUnit testing and my inclination is to use assertEquals(str1, str2) . Is this a reliable way to assert two Strings contain the same content? I would use assertTrue(str1.equals(str2)) , but then you don't get the benefit of seei...
Is there a way to make a PowerShell script work by double clicking a .ps1 file?
...u write scripts that are "dangerous" to execute, and you don't add a basic confirmation process... I reckon you like to live dangerously.
– Romain Vincent
May 23 at 14:25
add ...
Activity restart on rotation Android
...geting API 8 and my code does not have screenSize on configChanges and can confirm that it works fine (without re-orienting) on the device I have that is running ICS.
– Carl
Mar 12 '12 at 9:58
...
How to commit no change and new message?
...documentation (via DavidNeiss) including after-the-fact data about passing tests or lint (via Robert Balicki).
To test git commands without generating arbitrary changes (via Vaelus).
To re-create a deleted bare repository using gitolite (via Tatsh).
To arbitrarily create a new commit, such as for re...