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wdonahoe
2015-07-11 11:07:15 -04:00
parent f45be890af
commit 91b021f4b5
5 changed files with 35 additions and 110 deletions
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5
arrays_strings/permutation/permutation_solution.ipynb
View File

@@ -35,6 +35,7 @@
"source": [ "source": [
"## Constraints\n", "## Constraints\n",
"\n", "\n",
"* Can we assume the string is ASCII?\n", "* Can we assume the string is ASCII?\n",
" * Yes\n", " * Yes\n",
" * Note: Unicode strings could require special handling depending on your language\n", " * Note: Unicode strings could require special handling depending on your language\n",
@@ -163,7 +164,7 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 1, "execution_count": 3,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
@@ -241,7 +242,7 @@
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython2",
"version": "2.7.6" "version": "2.7.10"
} }
}, },
"nbformat": 4, "nbformat": 4,

47
arrays_strings/rotation/rotation_challenge.ipynb
View File

@@ -34,6 +34,7 @@
"source": [ "source": [
"## Constraints\n", "## Constraints\n",
"\n", "\n",
"* Can you assume the string is ASCII?\n", "* Can you assume the string is ASCII?\n",
" * Yes\n", " * Yes\n",
" * Note: Unicode strings could require special handling depending on your language\n", " * Note: Unicode strings could require special handling depending on your language\n",
@@ -74,38 +75,20 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 5, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [], "outputs": [],
"source": [ "source": [
"def is_substring(substr, s):\n", "def is_substring(s1, s2):\n",
" if len(s) < len(substr):\n", " # TODO: Implement me\n",
" return False\n", " pass\n",
" elif len(substr) == len(s) and len(s) == 0:\n",
" return True\n",
" pos = 0\n",
" while pos < len(s):\n",
" so_far = 0\n",
" while so_far < len(substr):\n",
" if substr[so_far] != s[pos]:\n",
" pos = pos + 1\n",
" break\n",
" else:\n",
" pos = pos + 1\n",
" so_far = so_far + 1\n",
" if so_far == len(substr):\n",
" return True\n",
" return False\n",
"\n", "\n",
"def is_rotation(s1, s2):\n", "def is_rotation(s1, s2):\n",
" if s1 is None or s2 is None:\n", " # TODO: Implement me\n",
" return False\n", " # Call is_substring only once\n",
" elif len(s1) != len(s2):\n", " pass"
" return False\n",
" else:\n",
" return is_substring(s2,s1+s1)"
] ]
}, },
{ {
@@ -126,19 +109,11 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 6, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [ "outputs": [],
{
"name": "stdout",
"output_type": "stream",
"text": [
"Success: test_rotation\n"
]
}
],
"source": [ "source": [
"# %load test_rotation.py\n", "# %load test_rotation.py\n",
"from nose.tools import assert_equal\n", "from nose.tools import assert_equal\n",
@@ -188,7 +163,7 @@
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython2",
"version": "2.7.6" "version": "2.7.10"
} }
}, },
"nbformat": 4, "nbformat": 4,

28
arrays_strings/unique_chars/unique_chars_challenge.ipynb
View File

@@ -34,6 +34,7 @@
"source": [ "source": [
"## Constraints\n", "## Constraints\n",
"\n", "\n",
"* Can you assume the string is ASCII?\n", "* Can you assume the string is ASCII?\n",
" * Yes\n", " * Yes\n",
" * Note: Unicode strings could require special handling depending on your language\n", " * Note: Unicode strings could require special handling depending on your language\n",
@@ -72,22 +73,15 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 2, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [], "outputs": [],
"source": [ "source": [
"def unique_chars(string):\n", "def unique_chars(string):\n",
" from collections import defaultdict\n", " # TODO: Implement me\n",
" \n", " pass"
" char_table = defaultdict(int)\n",
" for c in string:\n",
" if char_table[c] > 0:\n",
" return False\n",
" else:\n",
" char_table[c] = 1\n",
" return True"
] ]
}, },
{ {
@@ -106,19 +100,11 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 3, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [ "outputs": [],
{
"name": "stdout",
"output_type": "stream",
"text": [
"Success: test_unique_chars\n"
]
}
],
"source": [ "source": [
"# %load test_unique_chars.py\n", "# %load test_unique_chars.py\n",
"from nose.tools import assert_equal\n", "from nose.tools import assert_equal\n",
@@ -173,7 +159,7 @@
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython2",
"version": "2.7.6" "version": "2.7.10"
} }
}, },
"nbformat": 4, "nbformat": 4,

34
sorting_searching/insertion_sort/insertion_sort_challenge.ipynb
View File

@@ -34,6 +34,7 @@
"source": [ "source": [
"## Constraints\n", "## Constraints\n",
"\n", "\n",
"* Is a naiive solution sufficient?\n", "* Is a naiive solution sufficient?\n",
" * Yes" " * Yes"
] ]
@@ -67,25 +68,15 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 4, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [], "outputs": [],
"source": [ "source": [
"def insert(l,item_pos):\n",
" item = l[item_pos]\n",
" while item_pos > 0:\n",
" if l[item_pos - 1] > item:\n",
" l[item_pos - 1], l[item_pos] = l[item_pos], l[item_pos - 1]\n",
" item_pos -= 1\n",
" else:\n",
" break\n",
"\n",
"def insertion_sort(data):\n", "def insertion_sort(data):\n",
" for i,item in enumerate(data):\n", " # TODO: Implement me\n",
" insert(data,i)\n", " pass"
" return data"
] ]
}, },
{ {
@@ -101,22 +92,11 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 5, "execution_count": null,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
"outputs": [ "outputs": [],
{
"name": "stdout",
"output_type": "stream",
"text": [
"Empty input\n",
"One element\n",
"Two or more elements\n",
"Success: test_insertion_sort\n"
]
}
],
"source": [ "source": [
"# %load test_insertion_sort.py\n", "# %load test_insertion_sort.py\n",
"from nose.tools import assert_equal\n", "from nose.tools import assert_equal\n",
@@ -173,7 +153,7 @@
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython2",
"version": "2.7.6" "version": "2.7.10"
} }
}, },
"nbformat": 4, "nbformat": 4,

31
sorting_searching/insertion_sort/insertion_sort_solution.ipynb
View File

@@ -33,6 +33,7 @@
"source": [ "source": [
"## Constraints\n", "## Constraints\n",
"\n", "\n",
"* Is a naiive solution sufficient?\n", "* Is a naiive solution sufficient?\n",
" * Yes" " * Yes"
] ]
@@ -151,7 +152,7 @@
}, },
{ {
"cell_type": "code", "cell_type": "code",
"execution_count": 1, "execution_count": 3,
"metadata": { "metadata": {
"collapsed": false "collapsed": false
}, },
@@ -160,34 +161,16 @@
"name": "stdout", "name": "stdout",
"output_type": "stream", "output_type": "stream",
"text": [ "text": [
"Empty input\n" "Empty input\n",
] "One element\n",
}, "Two or more elements\n",
{ "Success: test_insertion_sort\n"
"ename": "NameError",
"evalue": "global name 'insertion_sort' is not defined",
"output_type": "error",
"traceback": [
"\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[1;31mNameError\u001b[0m Traceback (most recent call last)",
"\u001b[1;32m/home/wdonahoe/Documents/interactive-coding-challenges/sorting_searching/insertion_sort/test_insertion_sort.py\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m 24\u001b[0m \u001b[1;32mif\u001b[0m \u001b[0m__name__\u001b[0m \u001b[1;33m==\u001b[0m \u001b[1;34m'__main__'\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 25\u001b[0m \u001b[0mtest\u001b[0m \u001b[1;33m=\u001b[0m \u001b[0mTestInsertionSort\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 26\u001b[1;33m \u001b[0mtest\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mtest_insertion_sort\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
"\u001b[1;32m/home/wdonahoe/Documents/interactive-coding-challenges/sorting_searching/insertion_sort/test_insertion_sort.py\u001b[0m in \u001b[0;36mtest_insertion_sort\u001b[1;34m(self)\u001b[0m\n\u001b[0;32m 7\u001b[0m \u001b[1;32mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'Empty input'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 8\u001b[0m \u001b[0mdata\u001b[0m \u001b[1;33m=\u001b[0m \u001b[1;33m[\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 9\u001b[1;33m \u001b[0minsertion_sort\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mdata\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m 10\u001b[0m \u001b[0massert_equal\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mdata\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;33m[\u001b[0m\u001b[1;33m]\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m 11\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
"\u001b[1;31mNameError\u001b[0m: global name 'insertion_sort' is not defined"
] ]
} }
], ],
"source": [ "source": [
"%run -i test_insertion_sort.py" "%run -i test_insertion_sort.py"
] ]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {
"collapsed": true
},
"outputs": [],
"source": []
} }
], ],
"metadata": { "metadata": {
@@ -206,7 +189,7 @@
"name": "python", "name": "python",
"nbconvert_exporter": "python", "nbconvert_exporter": "python",
"pygments_lexer": "ipython2", "pygments_lexer": "ipython2",
"version": "2.7.6" "version": "2.7.10"
} }
}, },
"nbformat": 4, "nbformat": 4,