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Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...ults, but we've ascertained that it's at least one-quarter of all inputs.
Now let's look at a fixed-width (i.e. non-bignum) integer power function. For what portion inputs does it not simply overflow? To maximize the number of meaningful input pairs, the base should be signed and the exponent uns...
PostgreSQL Autoincrement
... @Dr Deo : they use serial instead autoincrement keyword, i don't know why :)
– Ahmad
Jul 22 '12 at 7:16
4
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Can someone explain the dollar sign in Javascript?
...them.
There is another common meaning for a dollar sign in an interpreter nowadays: the jQuery object, whose name only consists of a single dollar sign ($). This is a convention borrowed from earlier Javascript frameworks like Prototype, and if jQuery is used with other such frameworks, there will...
Primary key or Unique index?
...e a composed primary key (person_id, car_id)?
– unbeknown
Jan 28 '09 at 12:20
3
primary key (pers...
How to use UIVisualEffectView to Blur Image?
...the blur to an image? I've been trying to figure out the code for a while now :( still new at obj c!
7 Answers
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What underlies this JavaScript idiom: var self = this?
...in event handlers (especially in closures).
Edit: Note that using self is now discouraged as window.self exists and has the potential to cause errors if you are not careful.
What you call the variable doesn't particularly matter. var that = this; is fine, but there's nothing magic about the name....
How to get the name of the calling method?
...
Now it seems to be caller_locations[0].label on Ruby 2.2.0 else you always have send_action result
– brcebn
Feb 16 '16 at 15:25
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pip issue installing almost any library
...ll to get most of what I needed done, which has generally worked. However, now I'm trying to download the nltk library, and neither is getting the job done.
...
Determine if Android app is being used for the first time
...SET_APP_RUN_FIRST_TIME, "FIRST");
return App_runFirst;
}
}
Now Open Your Activity & Initialize .
private SharedPreference sharedPreferenceObj; // Declare Global
Now Call this in OnCreate section
sharedPreferenceObj=new SharedPreference(YourActivity.this)...
Does SQLAlchemy have an equivalent of Django's get_or_create?
... new record, it will raise IntegrityError. The whole thing gets messed up, now we don't know what actually happened and we get another error, that no record is found.
– rajat
Oct 8 '15 at 19:31
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