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exec - How to execute cmd commands via Java

I am trying to execute command line arguments via Java. For example: // Execute command String command = "cmd / ... were helpful but do not answer my question.) Question&Answers:os...

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

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123 views

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python - What exactly does "import *" import?

In Python, what exactly does import * import? Does it import __init__.py found in the containing folder? For ... or is from project.model import * sufficient? Question&Answers:os...

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

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634 views

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angular - Focus on newly added input element

I have a new Angular 2 app with a list of input boxes. When the user hits the return key, I add a new input box immediately ... interval); } }, 1); }); } } }); Question&Answers:os...

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

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python - Normalizing Unicode

Is there a standard way, in Python, to normalize a unicode string, so that it only comprehends the simplest ... half of the special cases, and do mistakes. Question&Answers:os...

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

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python - Should wildcard import be avoided?

I'm using PyQt and am running into this issue. If my import statements are: from PyQt4.QtCore import * from ... reason to use one style over the other? Question&Answers:os...

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

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c# - Difference between Equals/equals and == operator?

What is the difference between a == b and a.Equals(b)? Question&Answers:os...

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

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c++ - Accessing class members on a NULL pointer

I was experimenting with C++ and found the below code as very strange. class Foo{ public: virtual void ... does the object foo get allocated? Any thoughts? Question&Answers:os...

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

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How do I escape a reserved word in Oracle?

In TSQL I could use something like Select [table] from tablename to select a column named "table". How do I do this ... 't work. I'll check case and come back. Question&Answers:os...

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

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sql server - How do I create a comma-separated list using a SQL query?

I have 3 tables called: Applications (id, name) Resources (id, name) ApplicationsResources (id, app_id, resource_id) I ... a way I can do this in one query? Question&Answers:os...

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

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jsf - How to inject @EJB, @PersistenceContext, @Inject, @Autowired, etc in @FacesConverter?

How can I inject a dependency like @EJB, @PersistenceContext, @Inject, @AutoWired, etc in a @FacesConverter? In my ... converter so that I can access the DB? Question&Answers:os...

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

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c++ - A confusing detail about the Most Vexing Parse

My question is how the following line can be parsed as a function declaration: vector<int> v(istream_iterator<int>( ... arguments to functions? And if so, why? Question&Answers:os...

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

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php - Fatal error: Call to undefined function session_register()

session_register("username"); // session checker for pages $_SESSION['username']= $username; // storing username in ... php5.3 how can i solve this problems Question&Answers:os...

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

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215 views

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html - Centered elements inside a flex container are growing and overflowing beyond top

This question already has answers here: Question&Answers:os...

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

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python - Running unittest with typical test directory structure

The very common directory structure for even a simple Python module seems to be to separate the unit tests into their own ... : "To run the unit tests do X." Question&Answers:os...

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

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compilation - What does a just-in-time (JIT) compiler do?

What does a JIT compiler specifically do as opposed to a non-JIT compiler? Can someone give a succinct and easy to understand description? Question&Answers:os...

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

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377 views

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Windows batch files: .bat vs .cmd?

As I understand it, .bat is the old 16-bit naming convention, and .cmd is for 32-bit Windows, i.e., ... there some gotcha awaiting me by using the wrong suffix? Question&Answers:os...

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

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css - How to remove Firefox's dotted outline on BUTTONS as well as links?

I can make Firefox not display the ugly dotted focus outlines on links with this: a:focus { outline: none; ... to the design instead of ugly grey dots) 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

bash - Getting ssh to execute a command in the background on target machine

This is a follow-on question to the How do you use ssh in a shell script? question. If I want to execute a ... have SSH keys set up so no password is required. Question&Answers:os...

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

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105 views

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c - How to write a signal handler to catch SIGSEGV?

I want to write a signal handler to catch SIGSEGV. I protect a block of memory for read or write using ... to the main function after catching the signal. Question&Answers:os...

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

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118 views

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java - How to make a JAR file that includes DLL files?

I bought a third-party Java library which includes a JAR file and two DLL files. I wrote my own Java program ... do this and how to make it work properly. Question&Answers:os...

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

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195 views

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c# - Factory method with DI and IoC

I am familiar with these patterns but still don't know how to handle following situation: public class CarFactory { public CarFactory ... ()),....) break; } } } Question&Answers:os...

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

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381 views

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javascript - Vue.js dynamic images not working

I have a case where in my Vue.js with webpack web app, I need to display dynamic images. I want to show img ... not work. What should be correct 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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196 views

1 answer

The modulo operation on negative numbers in Python

I've found some strange behaviour in Python regarding negative numbers: >>> -5 % 4 3 Could anyone explain what's going on? Question&Answers:os...

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

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179 views

1 answer

windows - Using C#, how does one figure out what process locked a file?

In Windows, how do I determine (using C#) what process locked a file? Third-party tools are helpful, but not what I'm looking for. Question&Answers:os...

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

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116 views

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java - Efficient way to do batch INSERTS with JDBC

In my app I need to do a lot of INSERTS. Its a Java app and I am using plain JDBC to execute the ... into one. Any other tips for making batch INSERTs faster? Question&Answers:os...

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

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190 views

1 answer

html - Why are Bootstrap tabs displaying tab-pane divs with incorrect widths when using highcharts?

So I'm creating a page with tabbed content using Twitter's Bootstrap, yet the content of my starting ... find to make everything consistent? Thanks guys! Question&Answers:os...

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

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79 views

1 answer

Convert JSON String To C# Object

Trying to convert a JSON string into an object in C#. Using a really simple test case: JavaScriptSerializer ... it's an undefined object. Any ideas? Question&Answers:os...

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

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834 views

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bitmap - Android Camera Intent: how to get full sized photo?

I am using intent to launch camera: Intent cameraIntent = new Intent( android.provider.MediaStore.ACTION_IMAGE_CAPTURE) ... intent, data.getData() returns null. Question&Answers:os...

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

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