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Can Java 8 code be compiled to run on Java 7 JVM?
...tion is being done using invokeDynamic (which already exist in JDK 7). So, from the JVM instruction set standpoint, nothing should make the codebase incompatible. There are, though, a lot of API associated and compiler improvements that would could make the code from JDK 8 difficult to compile/run u...
How do you connect localhost in the Android emulator? [duplicate]
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But you need to change API from "localhost:port" to "127.0.0.1:port" first. after that, Use 10.0.2.2 to access your actual machine.
– binhtruong.it
Dec 9 '18 at 11:49
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Does running git init twice initialize a repository or reinitialize an existing repo?
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From the git docs:
Running git init in an existing repository is safe. It will not overwrite things that are already there. The primary reason for rerunning git init is to pick up newly added templates.
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What's the point of g++ -Wreorder?
... The order was man page-> SO answer. Here is an archive of the man page from 2007 that lists this example explicitly. The upvoted comment from Ben S is a hilarious example of someone suggesting that something exist without even checking that it does already. web.archive.org/web/20070712184121/htt...
Where in an Eclipse workspace is the list of projects stored?
I use Eclipse with "external" projects - i.e. projects created from existing source.
6 Answers
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What is this: [Ljava.lang.Object;?
I get this when I call toString on an object I received from a function call. I know the type of the object is encoded in this string, but I don't know how to read it.
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Adding a new SQL column with a default value
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Try this:
ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0;
From the documentation that you linked to:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
alter_specification [, alter_specification] ...
alter_specification:
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ADD [COLUMN] (col_name column_definition,...)
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Using mixins vs components for code reuse in Facebook React
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Update: this answer is outdated. Stay away from the mixins if you can.
I warned you!
Mixins Are Dead. Long Live Composition
At first, I tried to use subcomponents for this and extract FormWidget and InputWidget. However, I abandoned this approach halfway becau...
Formula px to dp, dp to px android
...olved my problem by using the following formulas. May other people benefit from it.
dp to px:
displayMetrics = context.getResources().getDisplayMetrics();
return (int)((dp * displayMetrics.density) + 0.5);
px to dp:
displayMetrics = context.getResources().getDisplayMetrics();
return (int) ((px/...
Can “git pull --all” update all my local branches?
...eful. The option is passed along to git fetch, which then fetches all refs from all remotes, instead of just the needed one; pull then merges (or in your case, rebases) the appropriate single branch.
If you want to check out other branches, you're going to have to check them out. And yes, merging (...