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Finding JavaScript memory leaks with Chrome
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I appreciate your effort. Indeed, the three snapshot technique is regularly mentioned in tutorials. Unfortunately, the details are often left out. For instance, I appreciate the introduction of the $0 function in the console, t...
cartesian product in pandas
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Use pd.MultiIndex.from_product as an index in an otherwise empty dataframe, then reset its index, and you're done.
a = [1, 2, 3]
b = ["a", "b", "c"]
index = pd.MultiIndex.from_product([a, b], names = ["a", "b"])
pd.DataFrame(index = index).res...
Add column with constant value to pandas dataframe [duplicate]
...le times.
# Wrong
df['new'] = [[]] * len(df)
# Right
df['new'] = [[] for _ in range(len(df))]
Generating a copy: df.assign(new=0)
If you need a copy instead, use DataFrame.assign:
df.assign(new='y')
A B C new
0 x x x y
1 x x x y
2 x x x y
3 x x x y
And, if you ne...
Entity Framework - Invalid Column Name '*_ID"
...er I figured my problem out). If you have some error related to OtherTable_ID when you are retrieving Table, go to your OtherTable model and make sure you don't have an ICollection<Table> in there. Without a relationship defined, the framework will auto-assume that you must have a FK to Othe...
How do I get Windows to go as fast as Linux for compiling C++?
...le-file lookup times, with a btree structure. In Linux (last I looked), an app can read an entire folder with a single system call, and iterate through the resulting structure entirely in user code; Windows requires a separate sys call for each file. Either way, compilers shouldn't need to read the ...
Password hint font in Android
...different font (courrier?). How can I avoid this? I would like the hint to appear in the same font that when the EditText is not in password mode.
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How to make a transparent HTML button?
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For me, I had to apply the property "cursor: pointer" to button:hover. With solely button it did not work.
– Spixmaster
Aug 14 at 9:58
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Stored procedure slow when called from web, fast from Management Studio
...ocedure that insanely times out every single time it's called from the web application.
7 Answers
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“continue” in cursor.forEach()
I'm building an app using meteor.js and MongoDB and I have a question about cursor.forEach().
I want to check some conditions in the beginning of each forEach iteration and then skip the element if I don't have to do the operation on it so I can save some time.
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Using a Single Row configuration table in SQL Server database. Bad idea?
In developing a shopping cart application I've found that I needed to save settings and configurations based on the administrator's preferences and requirements. This information can be anything from company information, Shipping account IDs, PayPal API keys, notification preferences, etc.
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