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c# - Method cannot be translated into a store expression

I saw this code work with LINQ to SQL but when I use Entity Framework, it throws this error: LINQ ... IQueryable. Could someone explain why this error occurs? Question&Answers:os...

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

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256 views

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Why does const imply internal linkage in C++, when it doesn't in C?

See subject. What were they thinking? UPDATE: Changed from "static" to "internal linkage" to save confusion. To give an ... g++ -c test.cpp only exports var_b. Question&Answers:os...

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

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154 views

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How can I hide the Android keyboard using JavaScript?

I would like to hide the Android virtual keyboard in JavaScript. Someone suggested doing this: $('#input').focus( ... . Is this something that can be done? 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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Android 6.0 Marshmallow. Cannot write to SD Card

I have an app that uses external storage to store photographs. As required, in its manifest, the following ... the app or your organisation". Any ideas? Question&Answers:os...

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

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regex - Regular expression to remove HTML tags from a string

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

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241 views

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android - Conversion to Dalvik format failed: Unable to execute dex: Java heap space

I have added a 2.45mb jar file to my Android eclipse project and now I continue to get "Conversion to Dalvik ... I continue to get the build error. Any ideas? Question&Answers:os...

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

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javascript - How to pick element inside iframe using document.getElementById

I have a iframe like this <iframe name="myframe1" id="myframe1" width="100%" height="100%" src="a.html"> < ... in several ways but I couldn't find a solution. Question&Answers:os...

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

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r - Pass arguments to dplyr functions

I want to parameterise the following computation using dplyr that finds which values of Sepal.Length are associated ... . How should this function be written? Question&Answers:os...

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

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java - What is the regex to extract all the emojis from a string?

I have a String encoded in UTF-8. For example: Thats a nice joke ?????? ?? I have to extract all ... I want to capture any character lying within this range. Question&Answers:os...

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

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java - Unable to locate tools.jar

I am building a project in Java. I have this error: Unable to locate tools.jar. Expected to find it in C: ... my system but the file tools.jar is not there. Question&Answers:os...

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

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334 views

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python - Why are empty strings returned in split() results?

What is the point of '/segment/segment/'.split('/') returning ['', 'segment', 'segment', '']? Notice ... you to have the empty string returned from each end? Question&Answers:os...

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

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javascript - Non-Standard Attributes on HTML Tags. Good Thing? Bad Thing? Your Thoughts?

HTML (or maybe just XHTML?) is relatively strict when it comes to non-standard attributes on tags. If they aren ... the potential downsides (if there are any)? Question&Answers:os...

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

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927 views

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generics - Java map with values limited by key's type parameter

Is there a way in Java to have a map where the type parameter of a value is tied to the type parameter of ... , even if it means using some slightly ugly casts. Question&Answers:os...

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

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102 views

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java - How to return multiple values?

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

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python - Repeating elements of a list n times

How do I repeat each element of a list n times and form a new list? For example: x = [1,2,3,4] n = 3 x1 = [ ... = n * x[i] There must be a simple and smart way. Question&Answers:os...

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

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139 views

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ios - How can I detect if an external keyboard is present on an iPad?

Is there a way to detect if an external (bluetooth or usb) keyboard is connected to the iPad? Question&Answers:os...

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

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512 views

1 answer

recursion - Using MySQL query to traverse rows to make a recursive tree

I have a bill of materials table that is set up like this: item - parent The end result when I display the bill ... tree. How could I do this query in mysql? Question&Answers:os...

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

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186 views

1 answer

java - Setting background color for a JFrame

Just how do you set the background color for a JFrame? Question&Answers:os...

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

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124 views

1 answer

javascript - Sort by two values prioritizing on one of them

How would I sort this data by count and year values in ascending order prioritizing on the count value? //sort this var data ... count: '33', year: '1989' }, ]; Question&Answers:os...

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

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755 views

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angular - Typescript flatMap, flat, flatten doesn't exist on type any[]

I'm using chrome 70 and chrome does add methods .flatMap, .flatten, .flat. So my code does run as ... dev @types/array.prototype.flatmap but still not solve. Question&Answers:os...

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

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342 views

1 answer

How to get PID of process I've just started within java program?

I've started a process with following code ProcessBuilder pb = new ProcessBuilder("cmd", "/c", "path"); try { ... the process's pid that I've just started. Question&Answers:os...

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

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149 views

1 answer

.net - What is the point of DBNull?

In .NET there is the null reference, which is used everywhere to denote that an object reference is empty, ... invented and what problems it helps to solve? Question&Answers:os...

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

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392 views

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PHP warning: Call-time pass-by-reference has been deprecated

I am getting the warning: Call-time pass-by-reference has been deprecated for the following lines of code: function XML ... does it cause and how to fix it? Question&Answers:os...

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

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1.3k views

1 answer

validation - Javascript: how to validate dates in format MM-DD-YYYY?

I saw a potential answer here but that was for YYYY-MM-DD: JavaScript date validation I modified the code code ... -YYYY and better yet MM/DD/YYYY? Thanks. Question&Answers:os...

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

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284 views

1 answer

android - Changing screen brightness programmatically (as with the power widget)

I was searching how to change the brightness of the screen programmatically and I found this it is very ... .provider.Settings.System.SCREEN_BRIGHTNESS, 200); } Question&Answers:os...

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

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103 views

1 answer

How to change default validation error message in ASP.NET MVC?

Say I have this property in my model: [DisplayName("test")] [Required(ErrorMessage = "required")] public ... .DateTime, ErrorMessage = 'some other message')] Question&Answers:os...

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

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266 views

1 answer

c# - Way to have String.Replace only hit "whole words"

I need a way to have this: "test, and test but not testing. But yes to test".Replace("test", "text") ... is my normal language, so responses in either are fine. Question&Answers:os...

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

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244 views

1 answer

css - Hide text node in element, but not children

I'm having a little trouble with CSS and can't seem to find a solution. I have this HTML <div id="closelink"> ... , nor the link within it. Can this be done? Question&Answers:os...

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

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