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How do you know a variable type in java?
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answered Apr 20 '10 at 11:18
MartinMartin
31.6k1313 gold badges676...
Ruby - test for array
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You probably want to use kind_of().
>> s = "something"
=> "something"
>> s.kind_of?(Array)
=> false
>> s = ["something", "else"]
=> ["something", "else"]
>> s.kind_of?(Array)
=> true
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pyplot scatter plot marker size
... [72,100,144]:
fig,ax = plt.subplots(figsize=(1.5,2), dpi=dpi)
ax.set_title("fig.dpi={}".format(dpi))
ax.set_ylim(-3,3)
ax.set_xlim(-2,2)
ax.scatter([0],[1], s=10**2,
marker="s", linewidth=0, label="100 points^2")
ax.scatter([1],[1], s=(10*72./fig.dpi)**2, ...
Lock-free multi-threading is for real threading experts
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Current "lock-free" implementations follow the same pattern most of the time:
*read some state and make a copy of it**
*modify copy**
do an interlocked operation
retry if it fails
(*optional: depends on the data structure/algorithm)
T...
How can I undo a `git commit` locally and on a remote after `git push`
I have performed git commit followed by a git push . How can I revert that change on both local and remote repositories?
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How to remove “index.php” in codeigniter's path
... to the beginning of the RewriteCond. RewriteCond $1 !^\/(index\.php|assets|robots\.txt)
– Henry
Sep 8 '13 at 18:21
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Calculate difference in keys contained in two Python dictionaries
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You can use set operations on the keys:
diff = set(dictb.keys()) - set(dicta.keys())
Here is a class to find all the possibilities: what was added, what was removed, which key-value pairs are the same, and which key-value pairs are ch...
How to determine the longest increasing subsequence using dynamic programming?
I have a set of integers. I want to find the longest increasing subsequence of that set using dynamic programming.
19 Ans...
Python Dictionary Comprehension
...(5)}
>>> print d
{0: 0, 1: 1, 2: 4, 3: 9, 4: 16}
If you want to set them all to True:
>>> d = {n: True for n in range(5)}
>>> print d
{0: True, 1: True, 2: True, 3: True, 4: True}
What you seem to be asking for is a way to set multiple keys at once on an existing dict...
How to create a circular ImageView in Android? [duplicate]
...e;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;
public class RoundedImageView extends ImageView {
public RoundedImageView(Context context) {
super(context);
}
public RoundedImageView(Context context, AttributeSet...