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Using the Swift if let with logical AND operator &&
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144
As of Swift 1.2, this is now possible. The Swift 1.2 and Xcode 6.3 beta release notes state:
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Regex replace uppercase with lowercase letters
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415
You may:
Find: (\w)
Replace With: \L$1
Or select the text, ctrl+K+L.
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Converting an integer to a hexadecimal string in Ruby
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You can give to_s a base other than 10:
10.to_s(16) #=> "a"
Note that in ruby 2.4 FixNum and BigNum were unified in the Integer class.
If you are using an older ruby check the documentation of FixNum#to_s and BigNum#to_s
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How do you delete an ActiveRecord object?
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It's destroy and destroy_all methods, like
user.destroy
User.find(15).destroy
User.destroy(15)
User.where(age: 20).destroy_all
User.destroy_all(age: 20)
Alternatively you can use delete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent associ...
How to overcome TypeError: unhashable type: 'list'
...ue = [x.strip() for x in line]
key = line[0].strip()
value = line[1].strip()
# Now we check if the dictionary contains the key; if so, append the new value,
# and if not, make a new list that contains the current value
# (For future reference, this is a great place for a default...
What does the WPF star do (Width=“100*”)
...r Height="*" means proportional sizing.
For example: to give 30% to column 1 and 70% to column 2 -
<ColumnDefinition Width="3*" />
<ColumnDefinition Width="7*" />
And likewise for rows -
<RowDefinition Height="3*" />
<RowDefinition Height="7*" />
The numbers do not ha...
How can I download HTML source in C#
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185
You can download files with the WebClient class:
using System.Net;
using (WebClient client =...
Set timeout for ajax (jQuery)
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edited Mar 7 '11 at 21:53
answered Mar 7 '11 at 21:43
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What does the tilde (~) mean in my composer.json file?
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143
Tilde means next significant release. In your case, it is equivalent to >= 2.0, < 3.0.
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How does IPython's magic %paste work?
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138
You can't copy to IPython directly. This are the steps:
Copy the lines you want to copy into...