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Postgres unique constraint vs index
... master values (0, 0);
INSERT 0 1
test=# insert into master values (0, 1);
ERROR: duplicate key value violates unique constraint "master_con_id_key"
DETAIL: Key (con_id)=(0) already exists.
test=# insert into master values (1, 0);
ERROR: duplicate key value violates unique constraint "master_uniq...
Does Ruby have a string.startswith(“abc”) built in method?
Does Ruby have a some_string.starts_with("abc") method that's built in?
4 Answers
4
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Programmatically set height on LayoutParams as density-independent pixels
Is there any way to set the height/width of a LayoutParams as density-independent pixels (dp)? It looks like the height/width, when set programmatically, are in pixels and not dp.
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What is the best way to uninstall gems from a rails3 project?
...ndler:
bundle exec gem uninstall GEM_NAME
Note that this throws
ERROR: While executing gem ... (NoMethodError) undefined method `delete' for #<Bundler::SpecSet:0x00000101142268>
but the gem is actually removed. Next time you run bundle install the gem will be reinstalled.
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Writing outputs to log file and console
... running the user script like log file name and path, redirect outputs and errors to log file, database connection details, etc ) which redirects all the outputs ( echo messages ) and errors to the log file from the executed script using the following code:
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Count table rows
... COUNT(*) is a strict language definition. You will get a parse error if you try COUNT (*) note the space
– ppostma1
Jun 23 '14 at 18:30
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How to select option in drop down protractorjs e2e tests
...ave two similar options it will use the last found option - which threw up errors based on the wrong selection. What worked for me was stackoverflow.com/a/25333326/1945990
– Mike W
Sep 9 '15 at 8:21
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Android Studio: Javadoc is empty on hover
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This hover works but can conflict with showing an error on the same line and can be difficult to get get the desired one open. Eclipse did the hovering javadoc and errors so much better!
– Gary Bak
Aug 7 '15 at 18:47
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Can git ignore a specific line?
I'm using git to sync to phonegap while testing on the phone's native browser. As such I have the following line:
8 Answers...
is there a require for json in node.js
I would like to include a couple of JSON files in my JavaScript code that are in the same directory as my JavaScript source file.
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