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What does iota of std::iota stand for?
...ase Greek letter iota.
In the quote above, I typed ι, U+03B9, “GREEK SMALL LETTER IOTA”, but Unicode actually has a dedicated code point for APL's iota: ⍳ is U+2373, “APL FUNCTIONAL SYMBOL IOTA”.
In response to the demands of commenters, I shall further address the etymology of “iot...
Truncate Two decimal places without rounding
... of decimal places (say 25) it will cause the end result to have precision error. I fixed it by changing the factor type to decimal.
– TheKingDave
Aug 19 '13 at 14:34
...
Git 工具 - 子模块(submodule)：一个仓库包含另一个仓库 - 开源 & Github -...
...or c3f01dc..c87d55d:
> catch non-null terminated lines
> more robust error handling
> more efficient db routine
> better connection routine
这非常有趣，因为我们可以直接看到将要提交到子模块中的提交日志。 提交之后，你也可以运行 git log -p ...
Is it correct to use alt tag for an anchor link?
...e that the src attribute isn’t allowed either.
By validating your HTML, errors like these are reported to you.
Note that the above is for HTML5, which is W3C’s HTML standard from 2014. In 2016, HTML 5.1 became the next HTML standard. Finding the allowed attributes works in the same way. You...
Asking the user for input until they give a valid response
...logic.
while True:
data = input("Please enter a loud message (must be all caps): ")
if not data.isupper():
print("Sorry, your response was not loud enough.")
continue
else:
#we're happy with the value given.
#we're ready to exit the loop.
break
w...
Rails 3.1: Engine vs. Mountable App
...s, someone please let me know and I'll fix this response. I have made a small article about the subject here Cheers!
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ViewController respondsToSelector: message sent to deallocated instance (CRASH)
...
Use Instruments to track down deallocated instance errors. Profile your application (Cmd ⌘+I) and choose Zombies template. After your application is running, try to crash it. You should get something like that:
Click on the arrow next to address in the popover to show ob...
Chaining multiple filter() in Django, is this a bug?
I always assumed that chaining multiple filter() calls in Django was always the same as collecting them in a single call.
4...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
...ble_name
end
end
I had to go and rename the model declaration file manually.
Edit:
In Rails 3.1 & 4, ActiveRecord::Migration::CommandRecorder knows how to reverse rename_table migrations, so you can do this:
class RenameOldTableToNewTable < ActiveRecord::Migration
def change
rena...
How to make a JSONP request from Javascript without JQuery?
...s helped me very much with my project. A minor issue: I've received SyntaxError: JSON.parse: unexpected character at line 1 column 2 of the JSON data. After adding single quotes to the data, everything worked fine, so: "processJSONPResponse('{"room":"main bedroom","items":["bed","chest of drawers"]...