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python - Convert floating point number to a certain precision, and then copy to string

I have a floating point number, say 135.12345678910. I want to concatenate that value to a string, but only want ... number. Is there an easy way to do this? Question&Answers:os...

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

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ruby on rails - ActiveRecord.find(array_of_ids), preserving order

When you do Something.find(array_of_ids) in Rails, the order of the resulting array does not depend on the order of ... and some kind of SQL clause, then how? Question&Answers:os...

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

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197 views

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Android TextView padding between lines

I have a TextView which displays a long text. I want to give some space between lines like in CSS with line-height property. How can I do it? Question&Answers:os...

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

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regex - Regular expression for exact match of a string

I want to match two passwords with regular expression. For example I have two inputs "123456" and "1234567" then the ... t make the expression. How do I do it? Question&Answers:os...

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

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560 views

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python - Check if string has date, any format

How do I check if a string can be parsed to a date? Jan 19, 1990 January 19, 1990 Jan 19,1990 01/19/1990 01/ ... print "Not a date" Is there any way to do this? Question&Answers:os...

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

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570 views

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json - Date query with ISODate in mongodb doesn't seem to work

I don't seem to be able to get even the most basic date query to work in MongoDB. With a document that looks something ... P.S.) > db.version() 2.4.7 Thanks! Question&Answers:os...

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

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c# - RestSharp JSON Parameter Posting

I am trying to make a very basic REST call to my MVC 3 API and the parameters I pass in are not ... called with RestSharp } Am I missing something here? Question&Answers:os...

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

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Android Lollipop, AppCompat ActionBar custom view doesn't take up whole screen width

So, I just updated my codebase to Lollipop, and I'm having issues with the Action Bar. I'm using ... CustomView take up the whole width of the ActionBar? Question&Answers:os...

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

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How to express a One-To-Many relationship in Django?

I'm defining my Django models right now and I realized that there wasn't a OneToManyField in the model field ... phoneNumbers; How can I express this in Django? Question&Answers:os...

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

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What's the Point of Multiple Redis Databases?

So, I've come to a place where I wanted to segment the data I store in redis into separate ... the advantage of being single threaded across databases? Question&Answers:os...

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

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How to format a Java string with leading zero?

Here is the String, for example: "Apple" and I would like to add zero to fill in 8 chars: "000Apple" How can I do so? Question&Answers:os...

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

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List of tables, db schema, dump etc using the Python sqlite3 API

For some reason I can't find a way to get the equivalents of sqlite's interactive shell commands: .tables . ... Python sqlite3 API. Is there anything like that? Question&Answers:os...

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

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859 views

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methods - Converting Integers to Roman Numerals - Java

This is a homework assignment I am having trouble with. I need to make an integer to Roman Numeral converter using a method. ... I"; input -= 1; } return s; } Question&Answers:os...

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

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Best way to unselect a <select> in jQuery?

<select size="2"> <option selected="selected">Input your option</option> <option>Input your option</option> ... using jQuery, to elegantly unselect the option? Question&Answers:os...

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

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java - Spring MVC - How to return simple String as JSON in Rest Controller

My question is essentially a follow-up to this question. @RestController public class TestController { @RequestMapping("/ ... to be in valid JSON format). Question&Answers: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 - Using NSPredicate to filter an NSArray based on NSDictionary keys

I have an array of dictionaries. I want to filter the array based on a key. I tried this: ... t actually evaluating the dictionaries. Bone head move. Question&Answers:os...

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

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android animation is not finished in onAnimationEnd

It seems that an android animation is not truly finished when the onAnimationEnd event is fired although animation. ... is where the background gets changed } Question&Answers:os...

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

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425 views

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.net - SELECT * FROM X WHERE id IN (...) with Dapper ORM

What is the best way to write a query with IN clause using Dapper ORM when the list of values for the IN ... parameter mapping technique that I'm not aware of? Question&Answers:os...

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

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147 views

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Android, How can I Convert String to Date?

I store current time in database each time application starts by user. Calendar c = Calendar.getInstance(); String ... .parse(aDate, pos); return stringDate; } Question&Answers:os...

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

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408 views

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java - Is it possible to disable jsessionid in tomcat servlet?

Is it possible to turnoff jsessionid in the url in tomcat? the jsessionid seems not too search engine friendly. Question&Answers:os...

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

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117 views

1 answer

How does push notification technology work on Android?

How has Google implemented their push notification feature? Does it work through polling done by a service running in the background or in a different way? Question&Answers:os...

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

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217 views

1 answer

How do I deal with certificates using cURL while trying to access an HTTPS url?

I am getting the following error using curl: curl: (77) error setting certificate verify locations: CAfile: ... I set this certificate verify locations? Thanks. Question&Answers:os...

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

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964 views

1 answer

How to clear navigation Stack after navigating to another fragment in Android

I am using The new Navigation Architecture Component in android and I am stuck in clearing the navigation stack ... (R.id.homeFragment, null, navOptions); Question&Answers:os...

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

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244 views

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Local function vs Lambda C# 7.0

I am looking at the new implementations in C# 7.0 and I find it interesting that they have implemented local ... Any example would be much appreciated. Thanks. Question&Answers:os...

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

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266 views

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python - Conda command is not recognized on Windows 10

I installed Anaconda 4.4.0 (Python 3.6 version) on Windows 10 by following the instructions here: https://www. ... access this file, and how I should edit it. Question&Answers:os...

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

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403 views

1 answer

python - How to keep index when using pandas merge

I would like to merge two DataFrames, and keep the index from the first frame as the index on the ... Switched to example code that can be easily reproduced Question&Answers:os...

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

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175 views

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python - How can I dynamically create derived classes from a base class

For example I have a base class as follows: class BaseClass(object): def __init__(self, classtype): self._type ... way, i.e. dynamically created class objects. Question&Answers:os...

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

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106 views

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c# - Difference Between Invoke and DynamicInvoke

What is the difference between Invoke and DynamicInvoke in delegates? Please give me some code example which explain difference between that two methods. Question&Answers:os...

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

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