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How to suppress “unused parameter” warnings in C?
...o...
void foo(int UNUSED(bar)) { ... }
I prefer this because you get an error if you try use bar in the code anywhere so you can't leave the attribute in by mistake.
and for functions...
static void UNUSED_FUNCTION(foo)(int bar) { ... }
Note 1):
As far as I know, MSVC doesn't have an equiva...
Cast a Double Variable to Decimal
...irst add numbers together and then convert to Decimal you may get rounding errors. You may want to convert the numbers to Decimal before adding them together, or make sure that the numbers aren't floating point numbers in the first place.
...
Run a single migration file
... out of the ruby file:
rails console
>> require "db/migrate/20090408054532_add_foos.rb"
>> AddFoos.up
Note: newer versions of rails may require AddFoos.new.up rather than AddFoos.up.
An alternative way (without IRB) which relies on the fact that require returns an array of class name...
.NET data structures: ArrayList, List, HashTable, Dictionary, SortedList, SortedDictionary — Speed,
... of the Array puzzle to know. While they do bounds checking (will throw an error), bounds checking can also be disabled on arrays.
Again, the biggest hindrance to arrays is that they are not re-sizable. They have a "fixed" capacity. Introducing ArrayList and List(Of T) to our history:
ArrayList - no...
json_encode is returning NULL?
...
If you have at least PHP 5.5, you can use json_last_error_msg(), which will return a string describing the problem.
If you don't have 5.5, but are on/above 5.3, you can use json_last_error() to see what the problem is.
It will return an integer, that you can use to identify ...
jsoncpp 不能处理__int64(long long)类型数据 - C/C++ - 清泛网 - 专注C/C++及内核技术
...cpp: In function ‘std::string createJsonData()’:
Test.cpp:41: error: conversion from ‘long long int’ to ‘const Json::Value’ is ambiguous
include/json/value.h:205: note: candidates are: Json::Value::Value(bool)
include/json/value.h:188: note: Jso...
Best way to assert for numpy.array equality?
...s now my favorite since it allows us to specify both absolute and relative error and doesn't require decimal rounding as the closeness criterion.
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What is time_t ultimately a typedef to?
...ckup.
– Rob Kennedy
Jan 23 '09 at 5:05
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Sibling package imports
... this topic).
– jfs
Nov 3 '17 at 18:05
@jfs I missed the virtual env path but i don't want to use anything more than s...
How to implement a rule engine?
...neric Rule compiler for any types of objects. Also, the code should handle errors, like unknown operator name.
Note that generating code on the fly was possible even before the Expression trees API was introduced, using Reflection.Emit. The method LambdaExpression.Compile() uses Reflection.Emit unde...