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Get image data url in JavaScript?
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Yes, you would download the image with XMLHttpRequest. Hopefully, it would use the cached version of the image, but that would depend on the server and browser configuration, and you would have the request overhead to determine if the file has changed. That's why I didn't ...
Accessing dict_keys element by index in Python3
... a useful hint. If it is really the first item you want*, then
next(iter(q))
is much faster than
list(q)[0]
for large dicts, since the whole thing doesn't have to be stored in memory.
For 10.000.000 items I found it to be almost 40.000 times faster.
*The first item in case of a dict being ...
How to prune local tracking branches that do not exist on remote anymore
...ches that are not in the list of remotes.
This line should do the trick (requires bash or zsh, won't work with standard Bourne shell):
git branch -r | awk '{print $1}' | egrep -v -f /dev/fd/0 <(git branch -vv | grep origin) | awk '{print $1}' | xargs git branch -d
This string gets the list of re...
In Vim, how do I apply a macro to a set of lines?
...o repeat that macro on all of the remaining lines in the file. Is there a quick way to do this?
4 Answers
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Firefox Add-on RESTclient - How to input POST parameters?
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If you want to submit a POST request
You have to set the “request header” section of the Firefox plugin to have a “name” = “Content-Type” and “value” = “application/x-www-form-urlencoded”
Now, you are able to submit parameter like “...
How do I get the entity that represents the current user in Symfony2?
...name();
should be enougth!
$user is your User Object! You don't need to query it again.
Find out the way to set up your providers in security.yml from Sf2 Documentation and try again.
Best luck!
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How can I check if character in a string is a letter? (Python)
... low = 'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'
upper = 'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'
for n in count:
if n in low:
lowercase += 1...
How to hide command output in Bash
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Hi, I know it's an old question but can the same be done conditionally? Like I want to hide the output under certain condition? I know I can replicate the same part under if-else but is there a better way to do so?
– Usama Zaf...
Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...义变量时，变量名不加美元符号（$），如：
your_name="qinjx"
注意，变量名和等号之间不能有空格，这可能和你熟悉的所有编程语言都不一样。
除了显式地直接赋值，还可以用语句给变量赋值，如：
for file in `ls /etc`
使用变...
Windows batch: formatted date into variable
... Variables that will be set: Year, Month, Day, Hour, Minute, Second, Quarter, WeekInMonth, DayOfWeek
– user
Dec 29 '15 at 13:31
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