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On a web page, there are two blocks of controls (primary and secondary), what class names would most people use? ... ">Remove</button> </div> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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math - An inverse Fibonacci algorithm?

There are dozens of ways of computing F(n) for an arbitrary n, many of which have great runtime and memory usage ... numbers using O(1) space. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How can I change the NavigationView's item text size?

Google recently released the android.support.design.widget.NavigationView widget as part of the com.android.support:design: ... any other way)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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css - Issue when centering vertically with flexbox when heights are unknown

My layout has a container flex-container and a child. HTML: <div class="flex-container"> <div>text</div> </ ... reprehenderit. </div> </div> See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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performance - When to use each method of launching a subprocess in Ruby

1. `` The Backtick defined in Kernel 1. a) %x{} Percent X < alternate syntax for The Backtick defined ... not complete answers to this question. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mysql - How to unblock with mysqladmin flush hosts

I have gone through similar cases listed here but it doesn't seem to work. I was using MySQL Workbench ... with 'mysqladmin flush-hosts' See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Setting document title in Rmarkdown from parameters

I've got an Rmarkdown template that works well, and I've parameterized it so I can generate variants of the ... I should be trying? Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - How to find out what is locking my tables?

I have a SQL table that all of a sudden cannot return data unless I include with (nolock) on the end, which ... I'm using SQL Server 2008 R2. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - prevent touchstart when swiping

I have a scrollable list on a mobile device. They want people to be able to scroll the list via swiping, ... best practice here to resolve this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How does Java's serialization work and when it should be used instead of some other persistence technique?

I've been lately trying to learn more and generally test Java's serialization for both work and personal projects ... it comes standard in Java? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - Core Bluetooth advertise and scan in the background

I have been trying to setup an app to make the device both scan for peripherals and advertise as a peripheral. ... How can I fix this? Thanks See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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asp.net mvc - Get ExtraData from MVC5 framework OAuth/OWin identity provider with external auth provider

I'm trying to use the new MVC5 framework in VS 2013 preview. The membership authentication framework has been ... . Can anyone enlighten me? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql - IN vs. JOIN with large rowsets

I'm wanting to select rows in a table where the primary key is in another table. I'm not sure if I should use a JOIN ... a JOIN b ON a.c = b.d See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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xcode - Building iOS applications using xcodebuild without codesign

We're building an app for another company. They hold the signing key and would rather not share it with us. ... it on xcodebuild's command line? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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SQL Server Group by Count of DateTime Per Hour?

create table #Events ( EventID int identity primary key, StartDate datetime not null, EndDate datetime not null ) ... Can anyone help? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Retain scroll position on route change in AngularJS?

Sample app: http://angular.github.com/angular-phonecat/step-11/app/#/phones If you choose the last phone " ... scrolling down for 30 seconds. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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jsonp - Pushing data to Google spreadsheet through JavaScript running in browser

I am working on an web application where I would like to allow the user to push data to her own Google ... . Thanks for looking into this. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Google Maps API v3: How do I dynamically change the marker icon?

Using Google Maps API v3, how do I programmatically change the marker icon? What I would like to do is, ... marker on the right changes color See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - How to merge a Series and DataFrame

If you came here looking for information on how to merge a DataFrame and Series on the index, please look at this answer. The ... 5 6 6 3 6 5 6 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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macos - mysql data directory location

I installed mysql in Mac after downloding its dmg file version 64 bit. While trying to create a database it ... lib/mysql in localhost. THANKS. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Does 'auto' type assignments of a pointer in c++11 require '*'?

Given my variable being a pointer, if I assign it to a variable of "auto" type, do I specify the "*" ... to a variable. Sorry for the confusion See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How do I find the CPU and RAM usage using PowerShell?

I am trying to get PowerShell to give me the RAM and CPU usage, but I can't figure out what WMI class ... the information for both of them. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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.net - Why remove unused using directives in C#?

I'm wondering if there are any reasons (apart from tidying up source code) why developers use the "Remove ... feature in Visual Studio 2008? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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sql server - SQL update trigger only when column is modified

By looking at other examples I've come up with the following but it doesn't seem to work as I would like ... S.QtyToRepair <> I.QtyToRepair END See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to grant remote access to MySQL for a whole subnet?

I can easily grant access to one IP using this code: $ mysql -u root -p Enter password: mysql> use mysql mysql ... remotely. How can i do that? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Can parameterized statement stop all SQL injection?

If yes, why are there still so many successful SQL injections? Just because some developers are too dumb to use parameterized statements? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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498 views

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objective c - What is the difference between a __weak and a __block reference?

I'm reading Xcode's documentation, and here is something that puzzles me: __block typeof(self) tmpSelf = self; [ ... So, I'm totally puzzled. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ios - How to Dismiss a Storyboard Popover

I've created a popover from a UIBarButtonItem using Xcode Storyboards (so there's no code) like this: ... UIBarButtonItem for a second time? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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