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What is a 'semantic predicate' in ANTLR?
...er: it parses an input string consisting of at least
// one number, optionally followed by zero or more comma's and numbers
parse
: number (',' number)* EOF
;
// matches a number that is between 1 and 3 digits long
number
: Digit Digit Digit
| Digit Digit
| Digit
;
// matches a si...
Android Gradle plugin 0.7.0: “duplicate files during packaging of APK”
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Don't know which one affects, but this is really helpful.
– CopperCash
Jul 4 '14 at 7:21
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What does this symbol mean in IntelliJ? (red circle on bottom-left corner of file name, with 'J' in
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click the directory and click the Sources button
It's weird because usually it's done automatically. Maybe it's better if you recreate the project again.
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Can't connect to MySQL server error 111 [closed]
I installed mysql server on linux box IP = 192.168.1.100 but when i try to connect to this IP it alway error(111). but use localhost and 127.0.0.1 is OK.
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Decimal number regular expression, where digit after decimal is optional
...r);
\d* - 0 or more digits (the decimal part);
$ - End of the line.
This allows for .5 decimal rather than requiring the leading zero, such as 0.5
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Accessing an array out of bounds gives no error, why?
...r make demons come out of your nose. It may format your harddrive or email all your porn to your grandmother.
It may even, if you are really unlucky, appear to work correctly.
The language simply says what should happen if you access the elements within the bounds of an array. It is left undefined...
Capitalize only first character of string and leave others alone? (Rails)
...ying to get Rails to capitalize the first character of a string, and leave all the others the way they are. I'm running into a problem where "i'm from New York" gets turned into "I'm from new york."
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boolean in an if statement
... will type coerce two things to be the same type and unless you understand all those rules and can anticipate everything that the JS interpreter might do when given two different types (which most JS developers cannot), you probably want to avoid == entirely.
As an example of how confusing it can b...
Merge up to a specific commit
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Sure, being in master branch all you need to do is:
git merge <commit-id>
where commit-id is hash of the last commit from newbranch that you want to get in your master branch.
You can find out more about any git command by doing git help <co...
Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...efers to a normal non-unique index. Non-distinct values for the index are allowed, so the index may contain rows with identical values in all columns of the index. These indexes don't enforce any restraints on your data so they are used only for access - for quickly reaching certain ranges of reco...