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How do I make a batch file terminate upon encountering an error?
... It's a very common idiom in most shell scripting languages, and it reads well: "Do this, or this if it fails.."
– Fowl
Nov 30 '12 at 5:22
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Should I use alias or alias_method?
...ed results. alias_method is determined at runtime and not when the code is read, like alias, so it behaves more how we would expect it to.
– Joshua Pinter
Apr 22 '14 at 16:10
4
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How important is the order of columns in indexes?
...alues, while Column 1 above does negate 1/2 the possibilities, the index already knows which index page to go straight to for the Column2 value, it does not necessary need Column 1 to narrow down the set.
– CodeCowboyOrg
Mar 23 '15 at 17:57
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Does Python optimize tail recursion?
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@Basic No, but you have to read the article you're commenting on. It seems very strongly that you didn't actually read it, considering how it "boils down" to you. (You might actually need to read both of the linked articles, unfortunately, since some a...
Create an empty object in JavaScript with {} or new Object()?
...sing new Object(); - whereas {}; can make your code more compact, and more readable.
For defining empty objects they're technically the same. The {} syntax is shorter, neater (less Java-ish), and allows you to instantly populate the object inline - like so:
var myObject = {
title: 'Frog'...
“where 1=1” statement [duplicate]
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Sorry, I didn't notice it was about the 1=1 read from logs but instead thought it was only about why using 1=1 AND something. Indeed, it's a useful within that context.
– Filipe Pina
Nov 16 '11 at 15:10
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Round a double to 2 decimal places [duplicate]
...t; 27.99). But I guess it's best to avoid it, since more reliable ways are readily available, with cleaner code too.
So, use this instead
(Adapted from this answer by Louis Wasserman and this one by Sean Owen.)
public static double round(double value, int places) {
if (places < 0) throw n...
SQL SELECT speed int vs varchar
...select by id: B=about 200us C=about 200us
* inserts to the table already containing 4M records
so it looks like for this setup, as long as your indexes fit in RAM, bigint vs 16-char text makes no difference in speed.
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Validating with an XML schema in Python
...'Valid! :)')
else:
print('Not valid! :(')
For more options read here: Validation with lxml
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iFrame src change event detection?
...ocation.href is available for other domains, but only for writing. However reading this.contentWindow.location.href is limited to the same domain.
– wadim
Mar 4 '15 at 11:17
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