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Once upon a time, when > was faster than < … Wait, what?
...
+1 No, this answer is correct to at least part of the question. The question is: "Is the author making things up, am I misunderstanding something, or is it indeed the case that once < was slower (vitally, as the author says) than >?". There are three opti...
MySQL: Transactions vs Locking Tables
... state.
Think of a banking system. When you pay a bill online, there's at least two accounts affected by the transaction: Your account, from which the money is taken. And the receiver's account, into which the money is transferred. And the bank's account, into which they'll happily deposit all the ...
Generate random numbers using C++11 random library
...uted in the range from 0 to a system- dependent maximum value
that is at least 32767.
The rand function has several problems: Many, if not most, programs
need random numbers in a different range from the one produced by
rand. Some applications require random floating-point numbers. Some
pr...
Which “href” value should I use for JavaScript links, “#” or “javascript:void(0)”?
...hey have JavaScript disabled.
If that is not possible, then you should at least inject the anchor tag into the document with JavaScript and the appropriate click event handlers.
I realize this isn't always possible, but in my opinion it should be striven for in developing any public website.
Ch...
How do I flush the PRINT buffer in TSQL?
...fering 50 lines and at 1k it switches to 100 lines each. This continued at least until 2k, but then I stopped the script. declare @i int set @i = 0 declare @t varchar(100) while 1=1 begin set @i = @i + 1 set @t = 'print ' + convert(varchar, @i) RAISERROR (@t, 10, ...
Is the size of C “int” 2 bytes or 4 bytes?
...re. For example, the following that the standard unsigned int requires (at least) sixteen bits of storage:
UINT_MAX 65535 // 2¹⁶ - 1
Thus we can see that unsigned int require (at least) 16 bits, which is where you get the two bytes (assuming CHAR_BIT is 8)... a...
Is there a setting on Google Analytics to suppress use of cookies for users who have not yet given c
...on is acceptable. In fact, their solution is fundamentally flawed, for at least three reasons: 1) it sets cookies prior to asking whether you are willing to accept them, 2) it must set a cookie in order to save your cookie preferences, and 3) it states that the site will not control 3rd party cooki...
How to copy from CSV file to PostgreSQL table with headers in CSV file?
...e ~100 columns, and COPY does not have this functionality, as of PG 9.3 at least.
– Daniel Vérité
Jul 28 '14 at 15:00
2
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Python: How would you save a simple settings/config file?
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It should be noted that at least the python 2 version of ConfigParser will silently convert stored list to string upon reading. Ie. CP.set('section','option',[1,2,3]) after saving and reading config will be CP.get('section','option') => '1, 2, 3'
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String concatenation: concat() vs “+” operator
...ld be faster. However, with more strings the StringBuilder method wins, at least in terms of performance.
The source code of String and StringBuilder (and its package-private base class) is available in src.zip of the Sun JDK. You can see that you are building up a char array (resizing as necessary...