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Bit Operations - Why ~8=-9, ~-8=7 in javascript?

After studying the relevant information on bitwise operations in JavaScript, I really don’t understand the inverted bitwise operation. I don’t understand why the inverted bitwise operation is not the maximum number - the current value, but ~8=-9, ~-8=7?

滿天的星座 2017-05-18 10:59:22

objective-c - Xcode 8 prompts error when opening Version Editor

After switching to this, the following prompt question will appear

phpcn_u1582 2017-05-02 09:35:29

objective-c - Xcode 8 packaging adHoc version prompts certificate issue

I want to put the adHoc method of packaging the iphone app project on fir.im, but after selecting the export to adHoc option, xcode prompts as shown below: It is normal for versions before xcode8 to package adHoc. I did it before packaging, 1 Disabled Automatic in the General Singing under the proje...

巴扎黑 2017-05-02 09:31:38

Problems React encounters when using utf-8

I'm developing a React based solution using VisualStudio. My React.js files are encoded in UTF-8. I'm using some danish text and what confuses me is that I have to rewrite ø to ø. The reason that confuses me is because the browser is showing UTF-8 replacement characters so I thought it must be using...

P粉644981029 2023-08-16 18:52:59

How to install mysql 8

How to install mysql 8 under ubuntu? I'm referring to this tutorial, but I can't get through setting the password https://kalasearch.cn/community/tutorials/ubuntu-20-04-install-mysql/

谢科 Eddie 2020-07-17 13:29:00

2-8 The video deleted from the database was placed in the wrong place

2-8 The video deleted from the database was placed in the wrong place

秋闲独醉 2021-11-25 14:17:15

Problem submitting POST_ORDER_FULFILLMENT_DATA feed

We cannot process the XML feed because one or more entries are invalid. Please resubmit the feed

P粉359850827 2023-08-07 20:59:49

javascript - How to operate array [2,4,8] so that it becomes (2 | 4 | 8)

How to operate the array [2,4,8] so that it becomes (2 | 4 | 8)? ? [2,4,8].join("|") == "2 | 4 | 8", which cannot reach the expected form of (2 | 4 | 8). I tried using join repeatedly....Outside Can't add parentheses? Please help me...

学习ing 2017-06-30 09:59:38