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How to execute a raw update sql with dynamic binding in rails
...t = ActiveRecord::Base.connection.raw_connection.prepare("update table set f1=? where f2=? and f3=?")
st.execute(f1, f2, f3)
st.close
I'm not sure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a normal update to see what it's doing as...
Is there a command to list all Unix group names? [closed]
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miken32
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answered Dec 27 '12 at 19:29
ArpitArpit
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C++ protobuf使用入门实例 - C/C++ - 清泛网 - 专注C/C++及内核技术
...化及反序列化：
/*
* misc_test.cc
*
* Created on: Jun 27, 2021
* Author: root
*/
#include "../my_test.h"
#include "test.pb.h"
TEST(ProtobufTest, PackAndUnpack) {
// ------Serialize------
google::protobuf::TestValue msg_val;
msg_val.set_number_value(123.f);
std...
【解决】asan runtime does not come first in initial library list - C/C...
...tackoverflow.com/questions/59853730/asan-issue-with-asan-library-loading
2021/8/5 添加2、3节。
asan 内存跟踪
When saving, how can you check if a field has changed?
...nd against it.
– Josh
Nov 23 '12 at 21:18
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show 23 more comments
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Get the latest record from mongodb collection
... want it to look nice
– Anthony
Jan 21 '16 at 19:26
So, what's the difference with this order : db.collection.find().s...
Scala: What is a TypeTag and how do I use it?
...5.7307 4.9328 45.2525 4.66231 44.6595 4.66231C43.6264 4.66231 43.1481 5.28821 43.1481 6.59048V11.9512C43.1481 13.2535 43.6264 13.8962 44.6595 13.8962C45.6924 13.8962 46.1709 13.2535 46.1709 11.9512V9.17788Z\"/\u003e\u003cpath d=\"M32.492 10.1419C32.492 12.6954 34.1182 14.0484 37.0451 14.0484C39.9723...
Java null check why use == instead of .equals()
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edited Dec 21 '10 at 16:37
answered Dec 21 '10 at 15:50
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水果vs蔬菜智能分类器 - EdgeML图像识别项目 · App Inventor 2 中文网
...建 Apps 首页 教育 中文教育版 各版本对比 App上架指南 入门必读 IoT专题 AI2拓展 Aia Store 关于 关于我们 发布日志 服务条款 ...
difference between variables inside and outside of __init__()
...s' % self.static_var
print 'Foo.static_var = %s' % Foo.static_var
f1 = Foo('f1')
f1.printAll()
f1.static_var = 'Shadowing static_var'
f1.printAll()
f2 = Foo('f2')
f2.printAll()
Foo.static_var = 'modified class'
f1.printAll()
f2.printAll()
Output:
self.instance_var = I am f1
self.s...