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Django - filtering on foreign key properties
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student_user = User.objects.get(id=user_id)
available_subjects = Subject.objects.exclude(subject_grade__student__user=student_user) # My ans
enrolled_subjects = SubjectGrade.objects.filter(student__user=student_user)
context.update({'available_subjects': avail...
How can I play sound in Java?
...lename) {
this.loop = false;
try {
InputStream raw = Object.class.getResourceAsStream(filename);
stream = new BufferedInputStream(raw);
// ByteArrayOutputStream out = new ByteArrayOutputStream();
// byte[] buffer = new byte[1024];
...
Smooth GPS data
... wrong...(Below is image url, blue is filtered locations' path, orange are raw locations) app.box.com/s/w3uvaz007glp2utvgznmh8vlggvaiifk
– umesh
Apr 28 '15 at 13:43
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Using i and j as variables in Matlab
...always use 1i combined with a different loop variable.
Examples of single letter indices that for if you don't use many loop variables and letters suffice: t,u,k and p
Example of longer indices: i_loop,step,walk, and t_now
Of course this is a matter of personal taste as well, but it should not b...
Iterating through a JSON object
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Your loading of the JSON data is a little fragile. Instead of:
json_raw= raw.readlines()
json_object = json.loads(json_raw[0])
you should really just do:
json_object = json.load(raw)
You shouldn't think of what you get as a "JSON object". What you have is a list. The list contains two di...
Command prompt won't change directory to another drive
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@SZaman in my experience. CD never changed drive letter without it.
– kenny
Mar 10 '17 at 14:53
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PowerShell: Store Entire Text File Contents in Variable
...de note, in PowerShell 3.0 you can use the Get-Content cmdlet with the new Raw switch:
$text = Get-Content .\file.txt -Raw
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css 设置行间距，段落行高的方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...个单词之间的间距
Normal<length>必须以长度为单位
Letter-spacing
定义了每个字母之间的间距
同上
Text-decoration
定义文字的“装饰”样式
None|underline|overline|
line-through|blink
Vertical-align
定义了元素在垂...
Rails has_many with alias name
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Give this a shot:
has_many :jobs, foreign_key: "user_id", class_name: "Task"
Note, that :as is used for polymorphic associations.
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urlencode vs rawurlencode?
...ing a variable I have two choices to encode the string. urlencode() and rawurlencode() .
11 Answers
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