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How to select the first element with a specific attribute using XPath
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461
Use:
(/bookstore/book[@location='US'])[1]
This will first get the book elements with the lo...
Python nonlocal statement
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495
Compare this, without using nonlocal:
x = 0
def outer():
x = 1
def inner():
x...
Maximum and Minimum values for ints
...nt values is available as sys.maxint:
>>> sys.maxint
9223372036854775807
You can calculate the minimum value with -sys.maxint - 1 as shown here.
Python seamlessly switches from plain to long integers once you exceed this value. So most of the time, you won't need to know it.
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Convert string to nullable type (int, double, etc…)
...is can be simplified a bit with string.IsNullOrWhiteSpace() if you use .Net4
– Sergej Andrejev
Nov 12 '10 at 12:57
1
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Database design for a survey [closed]
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edited Aug 13 '16 at 18:44
answered Nov 19 '09 at 17:04
D...
How to exit if a command failed?
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426
Try:
my_command || { echo 'my_command failed' ; exit 1; }
Four changes:
Change &&...
How to create dictionary and add key–value pairs dynamically?
... Date] = "today's value";
console.log(dict);
// => {
// "Sat Nov 04 2016 16:15:31 GMT-0700 (PDT)": "today's value"
// }
Note however that this doesn't necessarily "just work", as many objects will have a string representation like "[object Object]" which doesn't make for a non-unique k...
Invalid default value for 'create_date' timestamp field
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answered Feb 8 '12 at 11:24
DevartDevart
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How to set variables in HIVE scripts
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edited Sep 24 at 2:40
Ivelin
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answe...
How do I get the size of a java.sql.ResultSet?
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finnwfinnw
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