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What's the difference of “./configure” option “--build”, “--host” and “--target”?
... --build , --host and --target . I'm confusing their roles. What's the difference and semantics of them?
2 Answers
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surface plots in matplotlib
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For surfaces it's a bit different than a list of 3-tuples, you should pass in a grid for the domain in 2d arrays.
If all you have is a list of 3d points, rather than some function f(x, y) -> z, then you will have a problem because there are mult...
Getting HTTP code in PHP using curl
I'm using CURL to get the status of a site, if it's up/down or redirecting to another site. I want to get it as streamlined as possible, but it's not working well.
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How to rename items in values() in Django?
...oes SELECT cryptic_value_name AS renamed_value in the SQL.
Another option, if you always want the renamed version but the db has the cryptic name, is to name your field with the new name but use db_column to refer to the original name in the db.
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Where to place JavaScript in an HTML file?
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For example, if you're going to be doing a bunch of jQuery stuff, you would need the library loaded before you actually try to make use of it.
– BryanH
Jul 8 '09 at 22:09
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How to return a part of an array in Ruby?
... start and continuing for length elements, or
returns a subarray specified by range. Negative indices count
backward from the end of the array (-1 is the last element).
Returns nil if the index (or starting index) are out of range.
a = [ "a", "b", "c", "d", "e" ]
a...
List tables in a PostgreSQL schema
... to match any digit. All regular expression special characters work as specified in Section 9.7.3, except for . which is taken as a separator as mentioned above, * which is translated to the regular-expression notation .*, ? which is translated to ., and $ which is matched literally. You can emulate...
How to convert JSON string to array
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If you pass the JSON in your post to json_decode, it will fail. Valid JSON strings have quoted keys:
json_decode('{foo:"bar"}'); // this fails
json_decode('{"foo":"bar"}', true); // returns array("foo" => "bar")
j...
How to default to other directory instead of home directory
...c file:
foo() { cd /d/work_space_for_my_company/project/code_source ; }
If the directory name includes spaces or other shell metacharacters, you'll need quotation marks; it won't hurt to add them even if they're not necessary:
foo() { cd "/d/Work Space/project/code_source" ; }
(Note that I've ...
No Exception while type casting with a null in java
...ow null pointer because it first checks whether the object is null or not. If null then it simply prints the string "null". Otherwise it will call the toString method of that object.
Adding more details: Internally print methods call String.valueOf(object) method on the input object. And in valueOf...