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String formatting: % vs. .format vs. string literal
...ns, so in your log.debug example, the expression "some debug info: %s"%some_infowill first evaluate to, e.g. "some debug info: roflcopters are active", then that string will be passed to log.debug().
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Vim: insert the same characters across multiple lines
...e (Ctrlv).
Press j three times (or 3j).
Press I (capital i).
Type in vendor_. Note: It will only update the screen in the first line - until Esc is pressed (6.), at which point all lines will be updated.
Press Esc.
An uppercase I must be used rather than a lowercase i, because the lowercase i is...
What does `someObject.new` do in Java?
... dup
4: invokespecial #3; //Method "<init>":()V
7: astore_1
8: new #4; //class Test$TestInner
11: dup
12: aload_1
13: dup
14: invokevirtual #5; //Method java/lang/Object.getClass:()Ljava/lang/Class;
17: pop
18: invokespecial #6; //Method Test$Te...
How to use clock() in C++
...#include <cstdio>
#include <ctime>
int main() {
std::clock_t start;
double duration;
start = std::clock();
/* Your algorithm here */
duration = ( std::clock() - start ) / (double) CLOCKS_PER_SEC;
std::cout<<"printf: "<< duration <<'\n';
}
...
Declare a block method parameter without using a typedef
...ssue benefits from multiple):
@implementation CallbackAsyncClass {
void (^_loginCallback) (NSDictionary *response);
}
// …
- (void)loginWithCallback:(void (^) (NSDictionary *response))handler {
// Do something async / call URL
_loginCallback = Block_copy(handler);
// response will c...
How can Xml Documentation for Web Api include documentation from beyond the main project?
.... In particular, it discusses how to reroute the XML documentation to App_Data/XmlDocument.xml and uncommenting a line in your config that will consume that file. This implicitly only allows for one project's documentation file.
...
Is [UIScreen mainScreen].bounds.size becoming orientation-dependent in iOS8?
...ds.size;
if ((NSFoundationVersionNumber <= NSFoundationVersionNumber_iOS_7_1) && UIInterfaceOrientationIsLandscape([UIApplication sharedApplication].statusBarOrientation)) {
return CGSizeMake(screenSize.height, screenSize.width);
}
return screenSize;
}
...
How do you determine the size of a file in C?
...ject's code:
#include <sys/stat.h>
#include <sys/types.h>
off_t fsize(const char *filename) {
struct stat st;
if (stat(filename, &st) == 0)
return st.st_size;
return -1;
}
Changes:
Made the filename argument a const char.
Corrected the struct stat defini...
Is there a way to perform “if” in python's lambda
...
If you still want to print you can import future module
from __future__ import print_function
f = lambda x: print(x) if x%2 == 0 else False
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How to retry after exception?
... a nice way to retry a block of code on failure.
For example:
@retry(wait_random_min=1000, wait_random_max=2000)
def wait_random_1_to_2_s():
print("Randomly wait 1 to 2 seconds between retries")
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