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I am probably making a stupid mistake, but I can't find where it is. I want to count the number of lines ... for row in reader) print row_count 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 - Write a truly inclusive random method for javascript

Javascript's MATH object has a random method that returns from the set [0,1) 0 inclusive, 1 exclusive. Is there a ... 1] it is not truly random. 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 - Firestore update all documents in collections

I have a firestore collections named users, each users have a generated id with a field score : users 0e8X3VFL56rHBxxgkYOW ... how to do 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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c++ - Casting a large number type to a smaller type

I've had a good look around and can't find a similar question so apologies if it has been asked before. I' ... and the above results are luck? 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++ - Will exit() or an exception prevent an end-of-scope destructor from being called?

Let's say I have the following code: struct mytype { ~mytype() { /* do something like call Mix_CloseAudio ... from somewhere inside start() ? 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# - Convert a string's character encoding from windows-1252 to utf-8

I had converted a Word Document(docx) to html, the converted html has windows-1252 as its character encoding. In ... the html into UTF-8? 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# - UWP on desktop closed by top X button - no event

An UWP app which runs on desktop can be closed from the top X button but it doesn't have any event for it ... the UWP app is running on desktop? 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 - Textview change color on changing of state

How can I apply color on the various states(focused, pressed, enabled) of the TextView? I have already ... to change the Background 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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Convert a date vector into Julian day in R

I have a column of dates in the format: 16Jun10 and I would like to extract the Julian day. I have various years ... it doesn't seem to work. See Question&Answers more detail:os...

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

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reactjs - How to add custom Material-UI palette colors

I'm trying to establish my own palette colors to match my branding in Material-UI. So far I can only ... default withStyles(styles)(App); 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++ - Qt moc with implementations inside of header files?

Is it possible to tell the Qt MOC that I would like to declare the class and implement it in a single file rather ... into an .h and .cpp file? 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 - How to apply cross-hatching to a polygon using the grid graphical system?

Several functions in R's base graphical system, including rect() and polygon(), support cross-hatching via their ... will make this possible? 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 - How to window.open with a toolbar in Google Chrome?

The following javascript opens a pop-up in Firefox, Safari, IE, and Google Chrome: window.open("http://google ... which they are most familiar. See Question&Answers more detail:os...

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

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difference between <supports-screens> and <compatible-screens> on Android

I am now officially confused about the difference between the two manifest elements and I thought that by ONLY ... clear unfortunately :s Cheers 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# - Attribute on Interface members does not work

In my application several models need Password properties (eg, Registration and ChangePassword models). The ... inherited from interface? See Question&Answers more detail:os...

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

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Invalid command line parameter when Android executes

When I click the 'run as Android application' option, it shows the following error: [2010-08-16 16:56: ... please use -help for more information See Question&Answers more detail:os...

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

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java - Calling static method on a class?

Say, I have a reference to a Class object with SomeType having a static method. Is there a way to call that ... () can't be static anyways. 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# - How to skip the dialog of printing in printDocument.print() and print page directly?

When I use MyPrintDocument.print() in a Windows application written in C#, a dialog is shown for the Windows ... program uses a thermal printer. See Question&Answers more detail:os...

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

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mongodb - Find document with closest integer value

Let's assume I have a collection with documents with a ratio attribute that is a floating point number. {'ratio':1 ... value of abs(x-ratio)? See Question&Answers more detail:os...

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

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linker - Using pthread in c++

I am using pthread.h in a *.cc file. when I try to use pthread_exit(0); or pthread_join(mythrds[yy], ... funroll-all-loops -finline -ffast-math 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 find the maximum count using mysql?

Please let me know what is wrong with the below command mysql> select max(count(*)) from emp1 group by name ... ): Invalid use of group function See Question&Answers more detail:os...

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

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297 views

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r - read/write data in libsvm format

How do I read/write libsvm data into/from R? The libsvm format is sparse data like <class/target>[ ... to provide the necessary functionality. 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 to access files under assets folder of other apk's?

When we browse any apk we found there is one folder named assets. Now I want to access that folder programatically. ... apk file/just app name). See Question&Answers more detail:os...

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

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list - Zip with default value instead of dropping values?

I'm looking for a function in haskell to zip two lists that may vary in length. All zip functions I could ... not find any solution so far. See Question&Answers more detail:os...

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

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columnheader - How to change the first row to be the header in R?

I have the following table: X.5 X.6 X.7 X.8 X.9 X.10 X.11 X.12 X.13 17 Zip CuCurrent PaCurrent PoCurrent ... = 17:22, class = "data.frame") See Question&Answers more detail:os...

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

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540 views

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objective c - Formatting a number to show commas and/or dollar sign

I want to format my UILabel with commas or better with a dollar sign and commas (with no decimal). Here is the ... xxx,xxx How do 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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251 views

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Reference to a bash variable whose name contains dot

I have a bash variable: agent1.ip with 192.168.100.137 as its value. When I refer to it in echo like ... the value? UPDATE: my variables are: See Question&Answers more detail:os...

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

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548 views

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algorithm - C++: Converting Hexadecimal to Decimal

I'm looking for a way to convert hex(hexadecimal) to dec(decimal) easily. I found an easy way to do this like : ... < endl; and it doesn't work. See Question&Answers more detail:os...

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

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