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How to call Makefile from another Makefile?
...er directory, you need to cd to the directory:
clean:
cd gtest-1.4.0 && $(MAKE) clean
Note that each line in Makefile runs in a separate shell, so there is no need to change the directory back.
share
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How to use Swift @autoclosure
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Here's a practical example — my print override (this is Swift 3):
func print(_ item: @autoclosure () -> Any, separator: String = " ", terminator: String = "\n") {
#if DEBUG
Swift.print(item(), separator:separator, terminator: termin...
Why does JQuery have dollar signs everywhere?
...
Unless you are using another language like PHP to populate javascript in your site using HTMLdocs, at which point that dollar sign serves the additional purpose of breaking everything since PHP does use the dollar sign to start all variables. (A reason that if you're ...
Turn a string into a valid filename?
...he files or combination of valid chars that are illegal (like ".."), for example, what you say would allow a filename named " . txt" which I think is not valid on Windows. As this is the most simple approach I'd try to remove whitespace from the valid_chars and prepend a known valid string in case o...
How to evaluate a math expression given in string form?
...ression();
eat(')');
} else if ((ch >= '0' && ch <= '9') || ch == '.') { // numbers
while ((ch >= '0' && ch <= '9') || ch == '.') nextChar();
x = Double.parseDouble(str.substring(startPos, this.pos));
...
Is a url query parameter valid if it has no value?
...ring)
Most other URI-parsing APIs following something similar to this.
PHP parse_url, follows as similar implementation but only returns the string for the query. Parsing into an object of k=>v requires parse_string()
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What are some compelling use cases for dependent method types?
...f hash = "9e47088d"
def duplicates(r : Resource) = (local == r.local) && (hash == r.hash)
}
override def create : Resource = new RemoteFile
}
It's an example of the classic cake pattern: we have a family of abstractions which are gradually refined through a heirarchy (ResourceManag...
Calculating frames per second in a game
... mean the value of time that you calculated for the last frame. This way, all previous frames will be included, with the most recent frames weighted the most heavily.
– j_random_hacker
May 23 '13 at 20:37
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What is the fastest way to get the value of π?
I'm looking for the fastest way to obtain the value of π, as a personal challenge. More specifically, I'm using ways that don't involve using #define constants like M_PI , or hard-coding the number in.
...
What is the instanceof operator in JavaScript?
...ce p inherits from Person.prototype.
Per the OP's request
I've added a small example with some sample code and an explanation.
When you declare a variable you give it a specific type.
For instance:
int i;
float f;
Customer c;
The above show you some variables, namely i, f, and c. The type...