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How can I convert spaces to tabs in Vim or Linux?
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Using Vim to expand all leading spaces (wider than 'tabstop'), you were right to use retab but first ensure 'expandtab' is reset (:verbose set ts? et? is your friend). retab takes a range, so I usually specify % to mean "the whole file".
:s...
Android Json and null values
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Try with json.isNull( "field-name" ).
Reference: http://developer.android.com/reference/org/json/JSONObject.html#isNull%28java.lang.String%29
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How can I change the color of my prompt in zsh (different from normal text)?
To recognize better the start and the end of output on a commandline, I want to change the color of my prompt, so that it is visibly different from the programs output. As I use zsh, can anyone give me a hint?
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Spring Boot: How can I set the logging level with application.properties?
...config file (log4j.xml or logback.xml) to the src/main/resources directory and configure to your liking.
You can enable debug logging by specifying --debug when starting the application from the command-line.
Spring Boot provides also a nice starting point for logback to configure some defaults, col...
How do I start my app on startup?
I tried using the sample code in this link but it seems outdated and it did not work. So what changes do I have to make and to what files to have my app start automatically when Android finishes booting up?
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Java: Get first item from a collection
... That does the same thing, it just checks if it is a list first, and gets by index if it is. It also has some code to try to fail faster on an actual Collection (that is if the index is too large it tries to figure that out without iterating through the whole thing and throwing the excepti...
JPA - Returning an auto generated id after persist()
I'm using JPA (EclipseLink) and Spring. Say I have a simple entity with an auto-generated ID:
7 Answers
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How to read a text file into a list or an array with Python
..., a file containing the alphabetic characters 3 by row (a,b,c, d,e,f, etc) and apply the procedure described above what you get is a list like this: ['a', 'b', 'c\nd', 'e', ... ] (note the item 'c\nd'). I'd like to add that, the above problem notwistanding, this procedure collapses data from indivi...
How to sort two lists (which reference each other) in the exact same way
...rt(); zip(*tups)
100000 loops, best of 3: 2.84 us per loop
On the other hand, for larger lists, the one-line version could be faster:
>>> %timeit zip(*sorted(zip(list1, list2)))
100 loops, best of 3: 8.09 ms per loop
>>> %timeit tups = zip(list1, list2); tups.sort(); zip(*tups)
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使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...助应用程序，用于管理与 Cardboard 库的交互。具有 Java 和 Android 经验的开发人员可以将其用作指南，为 App Inventor 社区创建更丰富的 Cardboard 集成可能性。开发人员还应注意，刚刚发布的 Android 系统 7 (Nougat) 包含 Google 的 Daydream VR ...