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How to easily resize/optimize an image size with iOS?
...e:(CGSize)newSize;
{
UIGraphicsBeginImageContext( newSize );
[image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
As far as storage of the image, the fastest...
Difference between exit(0) and exit(1) in Python
...it(0) to indicate success, and exit(1) or any other non-zero value (in the range 1..255) to indicate failure. Any value outside the range 0..255 is treated modulo 256 (the exit status is stored in an 8-bit value). Sometimes, that will be treated as signed (so you might see -128, -127, etc) but mor...
Is it a good idea to index datetime field in mysql?
...
But if you query the data with date range, such as data range from "2017-01-01 11:20" to "2018-01-03 12:12", it doesn't make SELECT query faster even though I indexed date time column... index make query fast when I use equal operation.. Am i right?
...
How to log cron jobs?
...hat there are special characters you can use for lists (commas), to define ranges (dashes -), to define increment of ranges (slashes), etc. Take a look:
http://www.softpanorama.org/Utilities/cron.shtml
share
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Map Tiling Algorithm
...n be effected by the color).
Pseudo code:
iterations = 5
for iteration in range(iterations):
for i in range(400):
for j in range(400):
try:
grid[i][j] = average(grid[i+1][j], grid[i-1][j],
grid[i][j+1], grid[i][j+1])
...
Append column to pandas dataframe
...ome interesting behavior of join and concat:
dat1 = pd.DataFrame({'dat1': range(4)})
dat2 = pd.DataFrame({'dat2': range(4,8)})
dat1.index = [1,3,5,7]
dat2.index = [2,4,6,8]
# way1 join 2 DataFrames
print(dat1.join(dat2))
# output
dat1 dat2
1 0 NaN
3 1 NaN
5 2 NaN
7 3 Na...
erb, haml or slim: which one do you suggest? And why? [closed]
...ks of literal text. A small, but semantic win for me with slim is that any raw literal html with <> tags used is preceded by an explicit |. I prefer "everything is slim unless you explicitly make it literal with |" over "everything is literal until you make it haml with a %.
...
What is the fastest way to compute sin and cos together?
...sincos is not a complete implementation on its own; you need an additional range reduction step to put the argument into the valid input range for the fsincos instruction. The library sin and cos functions include this reduction as well as the core computation, so they are even faster (by compariso...
Import regular CSS file in SCSS file?
...To cut the long story short, the syntax in next:
to import (include) the raw CSS-file the syntax is without .css extension at the end (results in actual read of partial s[ac]ss|css and include of it inline to SCSS/SASS):
@import "path/to/file";
to import the CSS-file in a traditional way syntax g...
How could I use requests in asyncio?
...
'http://example.org/'
)
for i in range(20)
]
for response in await asyncio.gather(*futures):
pass
loop = asyncio.get_event_loop()
loop.run_until_complete(main())
...