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Difference between Observer, Pub/Sub, and Data Binding
...s imbued with the ability to notify others of specific events - typically done using actual events, which are kind of like slots in the object with the shape of a specific function/method. The observable is the one who provides notifications, and the observer receives those notifications. In .net, t...
Error in SQL script: Only one statement is allowed per batch
...d the problem. When I added the file in VS I forgot to set Build Action = None from the file properties. So changing that fixed the problem and the project now compiles.
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How to highlight cell if value duplicate in same column for google spreadsheet?
...onditional formatting
Click Add another rule (or edit the existing/default one)
Set Format cells if to: Custom formula is
Set value to: =countif(A:A,A1)>1 (or change A to your chosen column)
Set the formatting style.
Ensure the range applies to your column (e.g., A1:A100).
Click Done
Anything w...
How to output only captured groups with sed?
...default to printing each line (-n)
exclude zero or more non-digits
include one or more digits
exclude one or more non-digits
include one or more digits
exclude zero or more non-digits
print the substitution (p)
In general, in sed you capture groups using parentheses and output what you capture usi...
Using build types in Gradle to run same app that uses ContentProvider on one device
...ug app so I could have release version that I'm using and debug version on one phone. I was referencing this: http://tools.android.com/tech-docs/new-build-system/user-guide#TOC-Build-Types
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Java default constructor
What exactly is a default constructor — can you tell me which one of the following is a default constructor and what differentiates it from any other constructor?
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Git: How to squash all commits on branch
... git reset $(git merge-base master yourBranch)
git add -A
git commit -m "one commit on yourBranch"
This isn't perfect as it implies you know from which branch "yourBranch" is coming from.
Note: finding that origin branch isn't easy/possible with Git (the visual way is often the easiest, as seen ...
JavaScript variables declare outside or inside loop?
... code, it's better to declare var in that section, so the section stands alone and can be copy-pasted. Otherwise, copy-paste a few lines of code to a new function during refactoring, without separately picking out and moving the associated var, and you've got yourself an accidental global.
In parti...
Find size of an array in Perl
...decade). $[ is deprecated. Using $[ issues a deprecation warning even when one doesn't turn on warnings. Assigning anything but zero to $[ will be an error in 5.16. Can we stop mentioning $[ already?
– ikegami
Sep 13 '11 at 19:05
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
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plus one for placing the s.length() in the initialization expression. If anyone doesn't know why, it's because that is only evaluated once where if it was placed in the termination statement as i < s.length(), then s.length() w...