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Can I use if (pointer) instead of if (pointer != NULL)?
...an false while non-null pointers are converted into true. From the C++11 standard, section on Boolean Conversions:
A prvalue of arithmetic, unscoped enumeration, pointer, or pointer to member type can be converted to a
prvalue of type
bool. A zero value, null pointer value, or null member po...
ALTER TABLE, set null in not null column, PostgreSQL 9.1
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Execute the command in this format
ALTER TABLE tablename ALTER COLUMN columnname SET NOT NULL;
for setting the column to not null.
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What is cardinality in MySQL?
...ow.
Cardinality is a property which affects the ability to cluster, sort and search data. It is therefore an important measurement for the query planners in DBs, it is a heuristic which they can use to choose the best plans.
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Setting default value for TypeScript object passed as argument
...e argument object, with key=value for any defaults. Follow that with the : and a type declaration.
This is a little different than what you were trying to do, because instead of having an intact params object, you have instead have dereferenced variables.
If you want to make it optional to pass an...
How to run the sftp command with a password from Bash script?
...up. However, since I don't have control over other host, I cannot generate and share RSA keys with the other host.
9 Answe...
Are fluid websites worth making anymore? [closed]
I'm making a website now and I am trying to decide if I should make it fluid or not. Fixed width websites are much easier to make and also much easier to make them appear consistent.
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Android: Temporarily disable orientation changes in an Activity
... should not be interrupted. I'm doing the heavy lifting in another thread, and using a progress dialog which I set as non-cancellable. However, I noticed that if I rotate my phone it restarts the activity which is REALLY bad for the process that was running, and I get a Force Close.
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ActiveRecord: List columns in table from console
...rmation for a table through ActiveRecord. Crucially for me it was the only and easiest way to gain confidence in what my primary key really was at the database level.
– nibbex
Mar 11 '15 at 17:30
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How to insert a new line in Linux shell script? [duplicate]
...line.
Another alternative to use a single echo statement with the -e flag and embedded newline characters \n:
echo -e "Create the snapshots\n\nSnapshot created"
However, this is not portable, as the -e flag doesn't work consistently in all systems. A better way if you really want to do this is u...
What is this smiley-with-beard expression: “”?
...r 1 '13 at 0:56
R. Martinho FernandesR. Martinho Fernandes
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