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Check if a variable is a string in JavaScript

How can I determine whether a variable is a string or something else in JavaScript? Question&Answers:os...

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

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56 views

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ios - Detect if the device is iPhone X

My iOS app uses a custom height for the UINavigationBar which leads to some problems on the new iPhone X. Does ... methods. Measurements are the way to go". Question&Answers:os...

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

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178 views

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.net - Handling Dialogs in WPF with MVVM

In the MVVM pattern for WPF, handling dialogs is one of the more complex operations. As your view model does not ... something I would like to stay away from. Question&Answers:os...

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

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136 views

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android - How to show soft-keyboard when edittext is focused

I want to automatically show the soft-keyboard when an EditText is focused (if the device does not have a ... soft-keyboard if there is a physical one. Question&Answers:os...

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

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257 views

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php - Get first key in a (possibly) associative array?

What's the best way to determine the first key in a possibly associative array? My first thought it to ... inefficient. Does anyone have a better solution? Question&Answers:os...

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

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243 views

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Get Android Phone Model programmatically , How to get Device name and model programmatically in android?

I would like to know if there is a way for reading the Phone Model programmatically in Android. I would like ... HTC Dream, Milestone, Sapphire or whatever... Question&Answers:os...

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

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309 views

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unit testing - How do you test that a Python function throws an exception?

How does one write a unittest that fails only if a function doesn't throw an expected exception? Question&Answers:os...

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

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508 views

1 answer

visual studio - Microsoft.ACE.OLEDB.12.0 provider is not registered

I have a Visual Studio 2008 solution with two projects (a Word-Template project and a VB.Net console application for ... but I don't know what. Any ideas? Question&Answers:os...

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

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windows - How much memory can a 32 bit process access on a 64 bit operating system?

On Windows, under normal circumstances a 32 bit process can only access 2GB of RAM (or 3GB with a special ... special switches or settings that can change this? Question&Answers:os...

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

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python - Prepend line to beginning of a file

I can do this using a separate file, but how do I append a line to the beginning of a file? f=open('log. ... the file since the file is opened in append mode. Question&Answers:os...

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

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shell - Python: execute cat subprocess in parallel

I am running several cat | zgrep commands on a remote server and gathering their output individually for ... to collect the output for each individually? Question&Answers:os...

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

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php - Security threats with uploads

I am allowing users to upload files to my server. What possible security threats do I face and how can I ... up downloading an entire website full of malware? Question&Answers:os...

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

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165 views

1 answer

Defining static members in C++

I am trying to define a public static variable like this : public : static int j=0; //or any other value too I ... are not initialized with 0 as in C? Thanks ! Question&Answers:os...

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

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275 views

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google play - Android app is supported by 0 devices

I'm having trouble with the Google Play store that insists that my app is supported by 0 devices. I've tried all ... looked at our FAQs?" replies to e-mails. Question&Answers:os...

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

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1 answer

How to get current time from internet in android

I am making an app in which I want to get the current time from internet. I know how to get the time from ... get any clue about how to get it from internet. Question&Answers:os...

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

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95 views

1 answer

javascript - Implementing pagination in mongodb

I know that it is a bad practice to use skip in order to implement pagination, because when your data gets large ... is the best way to get this very last_id Question&Answers:os...

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

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263 views

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python - Why is dictionary ordering non-deterministic?

I recently switched from Python 2.7 to Python 3.3, and it seems that while in Python 2 the ordering of dictionary keys was arbitrary ... 5', '4', '9', '8'] ? Question&Answers:os...

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

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246 views

1 answer

python - Keras Dense layer's input is not flattened

This is my test code: from keras import layers input1 = layers.Input((2,3)) output = layers.Dense(4)( ... dot product with kernel. While the output is reshaped? Question&Answers:os...

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

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459 views

1 answer

visual studio 2012 - How do I create a C++/CLI Winforms app in VS2012?

I just installed Visual Studio 2012 express for Desktop. I can't see any place to create a GUI application ... +: Unable to invoke method from another class) Question&Answers:os...

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

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148 views

1 answer

javascript - forEach on querySelectorAll not working in recent Microsoft browsers

I am making a script for choices about a product (colors etc), which works in every browser except for Internet ... and all versions of Edge) had it...? Question&Answers:os...

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

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119 views

1 answer

python - tkinter and time.sleep

I am trying to delete text inside a text box after waiting 5 seconds, but instead the program wont run and ... ) textbox.pack() empty_textbox() root.mainloop() Question&Answers:os...

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

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478 views

1 answer

version control - Undo git pull, how to bring repos to old state

Is there any way to revert or undo git pull so that my source/repos will come to old state that was before ... screw it again, so asking for detailed steps ? Question&Answers:os...

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

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169 views

1 answer

c++ - How do I achieve the theoretical maximum of 4 FLOPs per cycle?

How can the theoretical peak performance of 4 floating point operations (double precision) per cycle be achieved on a ... xmm9, xmm2 addsd xmm13, xmm2 ... Question&Answers:os...

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

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306 views

1 answer

algorithm - How do you detect Credit card type based on number?

I'm trying to figure out how to detect the type of credit card based purely on its number. Does anyone know of a definitive, reliable way to find this? Question&Answers:os...

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

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173 views

1 answer

python - How to generate keyboard events?

short summary: I am trying to create a program that will send keyboard events to the computer that for all purposes ... well, but have yet to find a solution. Question&Answers:os...

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

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346 views

1 answer

RegEx for Javascript to allow only alphanumeric

I need to find a reg ex that only allows alphanumeric. So far, everyone I try only works if the string is ... one what would allow either and not require both. Question&Answers:os...

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

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352 views

1 answer

sd card - Android how to use Environment.getExternalStorageDirectory()

How can i use Environment.getExternalStorageDirectory() to read a a stored image from the SD card or is there a better way to do it? Question&Answers:os...

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

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602 views

1 answer

bitmap - How to resize Image in Android?

I am creating an application and want to setup a gallery view. I do not want the images in the gallery view to be full size. How do I resize images in Android? Question&Answers:os...

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

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