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How to execute raw SQL in Flask-SQLAlchemy app
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Have you tried:
result = db.engine.execute("<sql here>")
or:
from sqlalchemy import text
sql = text('select name from penguins')
result = db.engine.execute(sql)
names = [row[0] for row in result]
print names
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jQuery SVG vs. Raphael [closed]
I'm working on an interactive interface using SVG and JavaScript/jQuery, and I'm trying to decide between Raphael and jQuery SVG . I'd like to know
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Why can I change value of a constant in javascript
I know that ES6 is not standardized yet, but a lot of browsers currently support const keyword in JS.
7 Answers
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Undoing a git rebase
Does anybody know how to easily undo a git rebase?
18 Answers
18
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iOS开发过程中的各种tips - 更多技术 - 清泛网 - 专注C/C++及内核技术
...可以去看原文。
1.返回输入键盘
<UITextFieldDelegate>
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
2.CGRect
CGRectFromString(<#NSString *string#>)//有字符串恢复出矩形
CGRectInset(<#CGRect rect#>, <...
Instantiating a generic class in Java [duplicate]
I know Java's generics are somewhat inferior to .Net's.
10 Answers
10
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“Diff” an image using ImageMagick
How can I get the difference between two images? I have the original image. Someone has written on an exact duplicate of the original image. Now, I need to compare the original to the written on image and extract just the writing in image format.
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How does one reorder columns in a data frame?
...ws, and the 1,2,3,4 refers to the columns.
To change the order as in the above question do df2[,c(1,3,2,4)]
If you want to output this file as a csv, do write.csv(df2, file="somedf.csv")
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i...
When do we need curly braces around shell variables?
In shell scripts, when do we use {} when expanding variables?
7 Answers
7
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How can I change the version of npm using nvm?
I've been using NVM to install the latest versions of nodeJS for my node work. It works totally fine for installing separate versions and switching between them. It also installs the latest version of NPM within each local .../bin folder along with the node binary. However, there doesn't seem to be ...