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Is it safe to use -1 to set all bits to true?
...t's all about values - not bits. The variable is initialized with a value. If in the initializer you modify the bits of the variable used for initialization, the value will be generated according to those bits. The value you need, to initialize a to the highest possible value, is -1 or UINT_MAX. The...
Passing arguments forward to another javascript function
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but using apply like this might screw up the scope of b (if it's some inner function of an object for example)
– vsync
May 25 '13 at 22:47
3
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How to clone a case class instance and change just one field in Scala?
Let's say I have a case class that represents personas, people on different social networks. Instances of that class are fully immutable, and are held in immutable collections, to be eventually modified by an Akka actor.
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Default implementation for Object.GetHashCode()
...CONTRACTL_END;
VALIDATEOBJECTREF(obj);
DWORD idx = 0;
if (obj == 0)
return 0;
OBJECTREF objRef(obj);
HELPER_METHOD_FRAME_BEGIN_RET_1(objRef); // Set up a frame
idx = GetHashCodeEx(OBJECTREFToObject(objRef));
HELPER_METHOD_FRAME_END();...
Creating a zero-filled pandas data frame
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Note that you may run into int/float issue if you will be doing something like d.set_value(params) after initializing d to contain 0's. An easy fix is: d = pd.DataFrame(0.0, index=np.arange(len(data)), columns=feature_list).
– ximiki
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How to delete a word and go into insert mode in Vim?
... "a" commands are great in Vim, also try "ci{" inside a {} block, or "ca{" if you also wish to remove the {} characters too. To translate these commands to English to remember them better, try: "change inner { block" and "change a { block".
Documentation at http://vimdoc.sourceforge.net/htmldoc/mo...
How to convert an entire MySQL database characterset and collation to UTF-8?
...ablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Or if you're still on MySQL 5.5.2 or older which didn't support 4-byte UTF-8, use utf8 instead of utf8mb4:
ALTER DATABASE databasename CHARACTER SET utf8 COLLATE utf8_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET u...
How do I use itertools.groupby()?
...tor to iterate over each individual item in that group.
Here's a slightly different example with the same data, using a list comprehension:
for key, group in groupby(things, lambda x: x[0]):
listOfThings = " and ".join([thing[1] for thing in group])
print(key + "s: " + listOfThings + ".")
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Can enums be subclassed to add new elements?
...it - which defeats the point of an enum being a well-known set of values.
If you could tell us more about how you want to use this, we could potentially suggest alternative solutions.
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impro...
postgresql - replace all instances of a string within text field
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The Regular Expression Way
If you need stricter replacement matching, PostgreSQL's regexp_replace function can match using POSIX regular expression patterns. It has the syntax regexp_replace(source, pattern, replacement [, flags ]).
I will use flags i...