大约有 16,000 项符合查询结果（耗时：0.0337秒） [XML]
T-SQL query to show table definition?
... However you can get most of the details from Information Schema Views and System Views.
SELECT ORDINAL_POSITION, COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH
, IS_NULLABLE
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = 'Customers'
SELECT CONSTRAINT_NAME
FROM INFORMATION_SCHEMA.CONS...
How to optimize for-comprehensions and loops in Scala?
...t tail-recursive functions are also as fast as while loops (since both are converted to very similar or identical bytecode).
– Rex Kerr
May 27 '11 at 2:03
7
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How to input a regex in string.replace?
...
import os, sys, re, glob
pattern = re.compile(r"\<\[\d\>")
replacementStringMatchesPattern = "<[1>"
for infile in glob.glob(os.path.join(os.getcwd(), '*.txt')):
for line in reader:
retline = pattern.sub(replacem...
What's the meaning of interface{}?
...unction, the Go runtime will perform a type conversion (if necessary), and convert the value to an interface{} value.
All values have exactly one type at runtime, and v's one static type is interface{}.
An interface value is constructed of two words of data:
one word is used to point...
How do I initialize a byte array in Java?
...
Using a function converting an hexa string to byte[], you could do
byte[] CDRIVES = hexStringToByteArray("e04fd020ea3a6910a2d808002b30309d");
I'd suggest you use the function defined by Dave L in Convert a string representation of a hex d...
What does [ N … M ] mean in C aggregate initializers?
..., write [first ... last] = value. This is a GNU extension. For example,
int widths[] = { [0 ... 9] = 1, [10 ... 99] = 2, [100] = 3 };
It is not portable. Compiling with -pedantic with tell you so.
How does it work here?
The preprocessor replaces #include <asm/unistd.h> with its actual c...
What's the advantage of a Java enum versus a class with public static final fields?
...ly assign an enum element a certain value, and consequently the ability to convert an integer to an enum without a decent amount of effort (i.e. Convert integer value to matching Java Enum ).
...
Perform an action in every sub-directory using Bash
...o find "$D" -type d > /dev/null; done
real 0m0.327s
user 0m0.084s
sys 0m0.236s
# Option B
$ time for D in `find ./big_dir/* -type d`; do echo "$D" > /dev/null; done
real 0m0.787s
user 0m0.484s
sys 0m0.308s
...
How can I iterate through the unicode codepoints of a Java String?
... add a workaround method that works with foreach loops (ref), plus you can convert it to java 8's new String#codePoints method easily when you move to java 8:
You can use it with foreach like this:
for(int codePoint : codePoints(myString)) {
....
}
Here's the helper mthod:
public static It...
Gson - convert from Json to a typed ArrayList
Using the Gson library, how do I convert a JSON string to an ArrayList of a custom class JsonLog ? Basically, JsonLog is an interface implemented by different kinds of logs made by my Android app--SMS logs, call logs, data logs--and this ArrayList is a collection of all of them. I keep gettin...