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How do I calculate square root in Python?
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10 Answers
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Active
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Re-raise exception with a different type and message, preserving existing information
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Python 3 introduced exception chaining (as described in PEP 3134). This allows, when raising an exception, to cite an existing exception as the “cause”:
try:
frobnicate()
except KeyError as exc:
raise ValueError("Bad grape") from exc
The caught exception (exc, a KeyError) ...
Where is the “Fold” LINQ Extension Method?
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127
You will want to use the Aggregate extension method:
double product = doubles.Aggregate(1.0, ...
How to identify platform/compiler from preprocessor macros?
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133
For Mac OS:
#ifdef __APPLE__
For MingW on Windows:
#ifdef __MINGW32__
For Linux:
#ifdef...
Comparing arrays in JUnit assertions, concise built-in way?
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edited Dec 12 '11 at 19:46
answered Nov 19 '10 at 19:06
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Is gcc std::unordered_map implementation slow? If so - why?
...!!
With gcc-4.7
inserts: 37728
get : 2985
With gcc-4.6
inserts: 2531
get : 1565
So std::unordered_map in gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.....
Twig: in_array or similar possible within if statement?
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edited Apr 30 '15 at 4:42
jake stayman
1,2241111 silver badges2020 bronze badges
answered Sep...
How do I view the list of functions a Linux shared library is exporting?
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What you need is nm and its -D option:
$ nm -D /usr/lib/libopenal.so.1
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00012ea0 T alcSetThreadContext
000140f0 T alcSuspendContext
U atanf
U calloc
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Exported sumbols are indicated by a T. Required symbols that must be loaded from other shared objects have a U. No...
Base64: What is the worst possible increase in space usage?
...ore converting,, say it wanted to always permit the final byte array to be 16KB. How big could a 16KB byte array possibly become when converted to a Base64 string (assuming one byte per character)?
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MySQL: @variable vs. variable. What's the difference?
...nitialize this variable with a SET statement or inside a query:
SET @var = 1
SELECT @var2 := 2
When you develop a stored procedure in MySQL, you can pass the input parameters and declare the local variables:
DELIMITER //
CREATE PROCEDURE prc_test (var INT)
BEGIN
DECLARE var2 INT;
SET var...