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Which is more efficient: Multiple MySQL tables or one large table?
...ect * from users where name="bob". Once you have bob then you are using an index to find the joined tables to bob which is significantly faster because you are using bob's id. This happens regardless of if you are doing a join in your query or querying bob then querying a table separately. Of course...
What is Type-safe?
... following things:
You can't read from uninitialized variables
You can't index arrays beyond their bounds
You can't perform unchecked type casts
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How to determine if a list of polygon points are in clockwise order?
...i]) * (y[i] + y[(i+1) mod N]) ) for i = 0 to N-1. I.e., must must take the index Modulo N (N ≡ 0) The formula works only for closed polygons. Polygons have no imaginary edges.
– Olivier Jacot-Descombes
Jul 20 '15 at 14:45
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What is an 'endpoint' in Flask?
... the URL, you can use url_for(). Assume the following
@app.route('/')
def index():
print url_for('give_greeting', name='Mark') # This will print '/greeting/Mark'
@app.route('/greeting/<name>')
def give_greeting(name):
return 'Hello, {0}!'.format(name)
This is advantageous, as now w...
Android splash screen image sizes to fit all devices
...is the easiest task.
From https://romannurik.github.io/AndroidAssetStudio/index.html you can make a 9-patch image for all the resolutions - XHDPI,HDPI,MDPI,LDPI in just one click.
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How do I parse JSON with Objective-C?
...
NSString* path = [[NSBundle mainBundle] pathForResource:@"index" ofType:@"json"];
//将文件内容读取到字符串中，注意编码NSUTF8StringEncoding 防止乱码，
NSString* jsonString = [[NSString alloc] initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil];...
Difference between application/x-javascript and text/javascript content types
...ation/javascript
http://www.iana.org/assignments/media-types/application/index.html
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How to sort in-place using the merge sort algorithm?
.... It's a very good trade-off. Yes, it's possible to associate the original index with the rest of the key so that you've never got two elements the same, giving a stable sort; that comes at a necessary cost of some extra space (linear in the number of elements) because you can't maintain the relativ...
C char array initialization
...ic = (struct icont){ .array={ 42,67 } }; // 42, 67, 0, 0, 0, ...
// index ranges can overlap, the latter override the former
// (no compiler warning with -Wall -Wextra)
ic = (struct icont){ .array={ [0 ... 1]=42, [1 ... 2]=67 } }; // 42, 67, 67, 0, 0, ...
for (cnt=0; cnt<5; cnt++)
...
The Definitive C Book Guide and List
... M. Deitel (2015). Lots of good tips and best practices for beginners. The index is very good and serves as a decent reference (just not fully comprehensive, and very shallow).
Head First C - David Griffiths and Dawn Griffiths (2012).
Beginning C (5th Edition) - Ivor Horton (2013). Very good expla...