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File I/O in Every Programming Language [closed]
This has to be a common question that all programmers have from time to time.
How do I read a line from a text file? Then the next question is always how do i write it back.
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The SQL OVER() clause - when and why is it useful?
...ou use a GROUP BY or not
Example: get count per SalesOrderID and count of all
SELECT
SalesOrderID, ProductID, OrderQty
,COUNT(OrderQty) AS 'Count'
,COUNT(*) OVER () AS 'CountAll'
FROM Sales.SalesOrderDetail
WHERE
SalesOrderID IN(43659,43664)
GROUP BY
SalesOrderID, ProductID,...
How to apply a CSS filter to a background image
...gt;
<p>Fusce ut placerat eros. Aliquam consequat in augue sed convallis. Donec orci urna, tincidunt vel dui at, elementum semper dolor. Donec tincidunt risus sed magna dictum, quis luctus metus volutpat. Donec accumsan et nunc vulputate accumsan. Vestibulum
tempor, erat in mattis fring...
When should I use git pull --rebase?
...Your local branch, into which you pull changes, and remote branch are, actually, different branches, and git pull is about merging them. It's reasonable, since you push not very often and usually accumulate a number of changes before they constitute a completed feature.
However, sometimes--by what...
Using npm behind corporate proxy .pac
...m config set https-proxy http://X.X.X.X:80
Now you should be able to install any package!
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How does the “final” keyword in Java work? (I can still modify an object.)
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You are always allowed to initialize a final variable. The compiler makes sure that you can do it only once.
Note that calling methods on an object stored in a final variable has nothing to do with the semantics of final. In other words:...
How can I save my secret keys and password securely in my version control system?
...ransparently encrypt certain sensitive files when you push them so that locally (i.e. on any machine which has your certificate) you can use the settings file, but Git or Dropbox or whoever is storing your files under VC does not have the ability to read the information in plaintext.
Tutorial on Tr...
How to prevent multiple instances of an Activity when it is launched with different Intents
...unched using the "Open" button on the Google Play Store app (previously called Android Market). It seems that launching it from the Play Store uses a different Intent than launching it from the phone's application menu of icons. This is leading to multiple copies of the same Activity being launc...
What's the difference between identifying and non-identifying relationships?
...t make the foreign key to the parent part of the child's primary key. Formally, the "right" way to do this is to make the foreign key part of the child's primary key. But the logical relationship is that the child cannot exist without the parent.
Example: A Person has one or more phone numbers. ...
Using IPython notebooks under version control
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Here is my solution with git. It allows you to just add and commit (and diff) as usual: those operations will not alter your working tree, and at the same time (re)running a notebook will not alter your git history.
Although this can probably be adapted to ...