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iphone - What's the best way to use Obj-C 2.0 Properties with mutable objects, such as NSMutableArray?

I have an Obj-C 2.0 class that has an NSMutableArray property. If I use the following code, then the ... setter that does a -mutableCopy? 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 method to replace repeating blanks with single blanks

Is there a more elegant way of doing this. I want to replace repeating blanks with single blanks.... declare ... I would prefer generic SQL) 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 - Row count in a csv file

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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c# - Probability of getting a duplicate value when calling GetHashCode() on strings

I want to know the probability of getting duplicate values when calling the GetHashCode() method on string instances. ... ) on an x86 machine. See Question&Answers more detail:os...

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

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Use curly brackets to structure code in PHP

Is it possible to enclose code fragments in PHP within brackets (without using the fragment as a function)? Would ... several lines of code ?> 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 - How can I print error stack trace in JSP page?

I have set my error page like this in web.xml: <error-page> <exception-type>java.lang.Exception</exception- ... are available for my program. See Question&Answers more detail:os...

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

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Split by comma and how to exclude comma from quotes in split ... Python

python 2.7 code cStr = '"aaaa","bbbb","ccc,ddd"' newStr = cStr.split(',') print newStr # result : ['"aaaa"','" ... ','"bbb"','"ccc,ddd"'] Help.. See Question&Answers more detail:os...

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

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Renaming Files with Excel VBA

Here's what I need to do. I have these two columns in an excel sheet. With file names. First column has ... Any help would be much appreciated. 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 save XLSM file with Macro, using openpyxl

I have .xlsm file with a Macro function. I'm loading it using openpyxl and write some data to the file and ... openpyxl. 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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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# - How to prevent System.Xml.XmlException: Invalid character in the given encoding

I have a Windows desktop app written in C# that loops through a bunch of XML files stored on disk and ... outputpath="e:S2OutB0000004Pet Tab"/> See Question&Answers more detail:os...

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

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bash - Assigning to a positional parameter

How can I assign a value to a positional parameter in Bash? I want to assign a value to a default parameter: if ... that 4 is not a command. See Question&Answers more detail:os...

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

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Why is bash errexit not behaving as expected in function calls?

In the bash man page, it states: Exit immediately if a pipeline (which may consist of a single simple command), a ... false + e + false + false 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 Generics: non-static type variable T cannot be referenced from a static context

interface A<T> { interface B { // Results in non-static type variable T cannot // be referenced from a ... static when referenced from A.B? 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 - Does 'Select' always order by primary key?

A basic simple question for all of you DBA. When I do a select, is it always guaranteed that my result will be ... I'm using Oracle as my DB. 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 parse json and read in vb.net

I have this code in my project: Dim request As HttpWebRequest Dim response As HttpWebResponse = Nothing Dim reader ... ) into TextBox3.Text??? 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++ - Best way to determine if two path reference to same file in Windows?

How would I compare 2 strings to determine if they refer to the same path in Win32 using C/C++? While ... to match an existing C# 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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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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c++ - What's the difference between a const member function and a non-const member function?

I am very confused about the const version and non-const version member function like below: value_type& top() ... would they be used? 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 - 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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swift - "classname has no member functionname" when adding UIButton target

Super newb in Swift and iOS development here. I am following this tutorial about implementing a custom control in ... just crashes it later. See Question&Answers more detail:os...

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

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Intent filter to download attachment from gmail apps on Android

I have android application with intent filter (ACTION_VIEW) to open file and import it into my application. I wish ... any solution for 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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iphone - Local notification on application termination

I am working on an application which will not work if terminated. It has some background tasks. I want to show ... great. Thanks in Advance !!! See Question&Answers more detail:os...

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

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javafx GridPane retrieve specific Cell content

I want to retrieve the content of one specific cell in a Gridpane. I have put buttons in the cells with the ... 4,2) and get its content. See Question&Answers more detail:os...

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

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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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android - build.gradle and project libs

I have a project in android studio that uses a project library. My problem is the configuartion of the gradle files. I ... :support-v4:13.0.0' } See Question&Answers more detail:os...

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

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