大约有 22,000 项符合查询结果（耗时：0.0277秒） [XML]
Error during installing HAXM, VT-X not working
...ter and re-install the Intel's HAXM which can be found under ~SDK_LOCATION\extras\intel\Hardware_Accelerated_Execution_Manager. You can also manually download the standalone HAXM installer from Intel's website.
share
...
Why does flowing off the end of a non-void function without returning a value not produce a compiler
...times it is wrong and you have to put in an unnecessary return statement.
char getChoice() {
int ch = read();
if (ch == -1 || ch == 'q') {
System.exit(0);
}
else {
return (char) ch;
}
// Cannot reach here, but still an error.
}
It's a philosophical differ...
How to make the 'cut' command treat same sequental delimiters as one?
... page:
-s, --squeeze-repeats replace each input sequence of a repeated character
that is listed in SET1 with a single occurrence
of that character
share
|
...
How to handle configuration in Go [closed]
...ing/json"
"os"
"fmt"
)
type Configuration struct {
Users []string
Groups []string
}
file, _ := os.Open("conf.json")
defer file.Close()
decoder := json.NewDecoder(file)
configuration := Configuration{}
err := decoder.Decode(&configuration)
if err != nil {
fmt.Println("err...
minimum double value in C/C++
...ion represented by a single character in such a long expression, where the string even says "max", is sure to get someone sooner or later. Either it's stored in a descriptive variable, or use -1 * ... to make it a bit clearer.
– Filip Haglund
Jan 2 '17 at 23:34...
Parse config files, environment, and command-line arguments, to get a single collection of options
...ile(argparse.Action):
def __call__(self,parser,namespace,values,option_string=None):
# I can never remember if `values` is a list all the time or if it
# can be a scalar string; this takes care of both.
if isinstance(values,basestring):
parser.config_files.app...
What's the difference between echo, print, and print_r in PHP?
... are more or less the same; they are both language constructs that display strings. The differences are subtle: print has a return value of 1 so it can be used in expressions whereas echo has a void return type; echo can take multiple parameters, although such usage is rare; echo is slightly faster ...
Find a pair of elements from an array whose sum equals a given number
... java.util.HashMap;
public class ArrayPairSum {
public static void main(String[] args) {
int []a = {2,45,7,3,5,1,8,9};
printSumPairs(a,10);
}
public static void printSumPairs(int []input, int k){
Map<Integer, Integer> pairs = new HashMap<Integer, Integer&g...
Log to the base 2 in python
...n_function_or_method
Base Class: <type 'builtin_function_or_method'>
String Form: <built-in function log>
Namespace: Interactive
Docstring:
log(x[, base]) -> the logarithm of x to the given base.
If the base not specified, returns the natural logarithm (base e) of x.
In ...
Can't Find Theme.AppCompat.Light for New Android ActionBar Support
...
You need to do next:
File->Import (android-sdk\extras\android\support\v7). Choose "AppCompat"
Project-> properties->Android. In the section library "Add" and choose "AppCompat"
That is all!
Note: if you are using "android:showAsAction" in menu item, you ...