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How do you check “if not null” with Eloquent?
... out.
I did not have success running:
MyModel::whereNotNull('deleted_by')->get()->all(); // []
MyModel::where('deleted_by', '<>', null)->get()->all(); // []
MyModel::where('deleted_by', '!=', null)->get()->all(); // []
MyModel::wher...
How to resolve “Waiting for Debugger” message?
...pse also confused me so much before, but today, i got this problem solved, by the following steps:
When you want to debug a android project, for instance, mypro. you would right click on it in the "Package Explorer". Then choose "Debug as"-->"Android Application".
Then the emulator might stop a...
Are +0 and -0 the same?
...number representations allow for the existence of two zeros, often denoted by −0 (negative zero) and +0 (positive zero). This occurs in some signed number representations for integers, and in most floating point number representations. The number 0 is usually encoded as +0, but can be represented ...
How do I finish the merge after resolving my merge conflicts?
... natural command:
git merge --continue
See commit c7d227d (15 Dec 2016) by Jeff King (peff).
See commit 042e290, commit c261a87, commit 367ff69 (14 Dec 2016) by Chris Packham (cpackham).
(Merged by Junio C Hamano -- gitster -- in commit 05f6e1b, 27 Dec 2016)
See 2.12 release notes.
merge: ...
python re.sub group: number after \number
... backreferences as described above,
\g will use the substring
matched by the group named name, as
defined by the (?P...) syntax.
\g uses the corresponding
group number; \g<2> is therefore
equivalent to \2, but isn’t ambiguous
in a replacement such as \g<2>0. \20
would ...
Getting a Custom Objects properties by string var [duplicate]
... Because in this comment "thing" is a string (its surrounded by quotes).
– Rob
Oct 19 '16 at 8:11
if you...
Newline character sequence in CSS 'content' property? [duplicate]
...ce about the escape syntax, which essentially is:
\20AC must be followed by a space if the next character is one of a-f, A-F, 0-9
\0020AC must be 6 digits long, no space needed (but can be included)
NOTE: use \00000a rather than just \A when escaping an arbitrary string, because if the newline i...
SQL Server : GROUP BY clause to get comma-separated values [duplicate]
...a.ReportId
FOR XML PATH('')), 1, 2, '')
FROM your_table a
GROUP BY ReportId
SQL fiddle demo
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How to copy JavaScript object to new variable NOT by reference? [duplicate]
... data gets updated as well. This must mean that the JSON object was passed by reference, right?
2 Answers
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Service and Characteristic are not published by the connected device -...
Service and Characteristic are not published by the connected device，报错如下：
问题原因：硬件/蓝牙芯片问题导致的，比如A硬件测试好的，换了B硬件没有修改uuid，就出现这个报错。
由于B硬件没有发布这些特征，就会报这个错误。